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GEH-5375B&k

Epic MicroVersaTrip® System

for Power Break® SwitchboardsAKD-8 Switchgear

User's Manual

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GEH-5375B

WARNINGS, CAUTIONS, AND NOTESAS USED IN THIS PUBLICATION

WARNINGSWarning notices are used in this publication to emphasize that hazardous voltages, cur-rents, or other conditions that could cause personal injury exist in this equipment or maybe associated with its use.Warning notices are also used for situations in which inattention or lack of equipmentknowledge could cause either personal injury or damage to equipment.

CAUTIONSCaution notices are used for situations in which equipment might be damaged if care isnot taken.

NOTESNotes call attention to information that is especially significant to understanding andoperating the equipment.This document is based on information available at the time of its publication. Whileefforts have been made to ensure accuracy, the information contained herein does notcover all details or variations in hardware and software, nor does it provide for every pos-sible contingency in connection with installation, operation, and maintenance. Featuresmay be described herein that are not present in all hardware and software systems. GEElectrical Distribution & Control assumes no obligation of notice to holders of this docu-ment with respect to changes subsequently made.GE Electrical Distribution & Control makes no representation or warranty, expressed,implied, or statutory, with respect to, and assumes no responsibility for the accuracy,completeness, sufficiency, or usefulness of the information contained herein. No warran-tees of merchantability or fitness for purpose shall apply.

The following are trademarks of GE Company:

Epic MicroVersaTrip®, Power Break®

t ©Copyright 1993 GE CompanyAll Rights Reserved

»I

Epic MicroVersaTrip® SystemTable of ContentsChapter 1. Introduction

1-1 Read This First1-2 Epic MicroVersaTrip System1-S Trip Unit1-4 Field Programming Unit......1-5 Potential Transformers1-6 Control Power1-7 Remote Communications....

1123344

Chapter 2. Detailed Description2-1Field Programming Unit.

InputsOutputs ...Communications

66666Discrete Input Contacts Monitoring

FPU Catalog Numbers 662-2 Trip Units

InputsOutputsCircuit Breaker ApplicationsEpic MicroVersaTrip Trip Unit Catalog NumbersMicroVersaTrip PM Trip Unit Catalog Numbers..

2-3Rating PlugsRating Plug Catalog Numbers

2-4 Interchangeability2-5 Overcurrent Functions

6667788

1010

Current SettingLong-Time Pickup and DelayIndicator LightShort-Time Pickup and Delay (Optional) ..Instantaneous PickupGround-Fault Pickup and Delay (Optional)Zone-Selective Interlock

2-6 Neutral-Current Transformers2-7 Wiring

101010101111111212

Chapter 3. System Operation3*1 FPU Faceplate3*2 Function Keys3-3Action and Command Keys ..

Last Display / Last eventSelect Breaker

1313131313

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Epic MicroVersaTrip® SystemTable of Contents

14ProgramClearHelpSilence Alarm ....KeypadEnterCommand Block

141515151515

Chapter 4. Installation4-1 Overview4-2 Password Protection4-3System Setup

Date and Time4-4 System Parameters

Demand IntervalCommunication Parameters

4-5 Breaker ParametersAddress DefinitionAdding Breakers to the SystemCurrent Rating for Metering Module ....Modification of Breaker Current RatingAdding Another Breaker to the System .Removing a Breaker from the System

1717171718181819191921212122

Chapter 5. Operation of Function Keys5-1 Displaying Screens5-2 View Meters

232324Phase RMS Current Display

Line-to-Neutral Voltage DisplayLine-to-Llne Voltage DisplayEnergy-Flow DisplayDemand DisplayPeak-Demand DisplayReal-Power DisplayReactive-Power DisplayTotal-Power DisplayPower-Factor DisplayPeak-Capacity DisplayFrequency Display

2424242424252525252525265-3 View Status 26Device Status Display

Functional Self-Test Display 26

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m

Epic MicroVersaTrip® SystemTable of Contents

Breaker Status DisplayOvercurrent Status DisplayProtective-Relaying Status Display

5-4 View/Change Set PointsUndervoltage Set Point and DelayVoltage-Unbalance Set Point and Time DelayCurrent-Unbalance Set Point and Delay ...

Reverse-Power Set Point and DelayOvervoltage Set Point and Delay

5-5 View EventsProtective-Relay EventsOvercurrent EventsSystem-Communication EventsEnergy Error EventsElectronic Component EventsClearing Events in the Event Log

5-6Set-Up SystemTime of Power Up

5-7 Discrete Contacts

26262626272728292930303131313232323333

IChapter 6. Trouble-Shooting Guide. 34

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Epic MicroVersaTrip® SystemList of Figures

&1. AKR circuit breaker frame, Epic MicroVersaTrip trip unit, and field programming unit

mounted in switchgear2. Connection diagram of Epic MicroVersaTrip system3. Epic MicroVersaTrip trip unit.4. MicroVersaTrip PM trip unit5. Field programming unit front panel6. RS-232 connector mounted in vertical wire trough

1. Function keys on left side of FPU faceplate .....8. SET-UP SYSTEM key9. Group of four action and command keys

10. SILENCE ALARM key.11. Numeric keypad and ENTER key12. Command block, containing list of screens and their sequence

123.345

131314151516

4

4i r

Epic MicroVersaTrip® SystemList of Tables

1. FPU catalog numbers2. Power Break circuit breaker types usable with Epic MicroVersaTrip and MicroVersaTrip

PM trip units3. Type AKR circuit breaker frames usable with Epic MicroVersaTrip and MicroVersaTrip

PM trip units4. Epic MicroVersaTrip trip unit catalog number prefixes and corresponding current

sensor ratings5. Epic MicroVersaTrip trip unit catalog number suffixes for optional protective

functions6. Trip unit catalog number prefixes and corresponding current sensor ratings7. MicroVersaTrip PM trip unit catalog number suffixes for optional protective functions....8. MicroVersaTrip PM trip unit suffixes for communication, metering, and relaying9. Epic MicroVersaTrip rating plug catalog numbers

10. MicroVersaTrip PM rating plug catalog numbers11. Ranges of values of current setting as a fraction of radng plug ampere rating, X12. Adjustable instantaneous pickup settings, as a multiple of X13. Ground-fault pickup settings14. Voltages measured at FPU terminal block15. Failure codes for electronic components

6

7

7

7

788899

1011111732

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Epic MicroVersaTrip® SystemChapter / . Introduction

* • Power supply• Remote communications1-1 Read This First

The Power Break circuit breakers in Power Breakswitchboards and Type AKR circuit breakers in AKD-8 switchgear, used with the Epic MicroVersaTrip®system, consist of two main elements:

• Circuit breaker frame

Each trip unit is mounted at the breaker, as shown inFigure 1. The field programming unit is mounted inthe switchboard or switchgear at a convenient height.The trip unit is connected to the phase CTs insidethe breaker. In addition, it is connected to the PTs,

• Trip unit, which includes the rating plug power supplies, and the FPU, as shown in Figure 2.To alter the rating of a breaker, a different rating The PTs> Power P P t y> voltage conditioners, and

modem are also mounted in the switchboard orplug is inserted in place of the one supplied with thebreaker. The new rating plug must be compatible switchgear.with both the breaker frame and sensor ratings. An External or customer-wired ports are factory wired toincorrect rating plug can not be inserted into thetrip unit.

a vertical terminal board mounted in a wire troughat the rear of the switchboard. Refer to the elemen-tary electrical diagrams for the connection pointswithin the equipment.The trip unit is configured at the factory to match

the specific sensor in the breaker. Moving a trip unitto a different breaker, without regard to the sensorrating, may result in an unsafe condition. Therefore,it is important that the following caution beobserved:

CAUTION: Spare Epic MicroVersaTrip or Micro-VersaTrip PM trip units should not be kept as gen-eral replacements for use in any breaker. If the sen-sor rating of the breaker and the rating for which thetrip unit was configured at the factory are not thesame, an unsafe condition can result. If a spare isrequired, we recommend maintaining a completebreaker frame, trip unit, and rating plug for installa-tion as a unit.It is not necessary to remove the trip unit to test the breaker.The MicroVersaTrip RMS-9 test kit (Cat. No.TVRMS) may be plugged into the rating plug testsocket to test the breaker while the breaker is carry-ing current.

1-2 Epic MicroVersaTrip System

The Epic MicroVersaTrip system consists of the fol-lowing components:

• Trip unit• Field programming unit (FPU)

• Potential transformers (PTs)

• Voltage conditioners

Figure 1. AKR circuit breaker frame, Epic MicroVersaTrip tripunit, and field programming unit mounted in switchgear.w

1

Epic MicroVersaTrip0 SystemChapter / , Introduction

Modern HostComputer Direct Line for

Short Distances(50’ or less)Telephone

ModernField

ProgrammingControlPowerSource

PowerSupplyUnit

RS-232ControlPower

Port

BusCommunicationBus Switchgear or Switchboard

/W\

1) \PSy r

A

Q Main FeederFeeder Feeder

ss 4;Iff, — f. Trip CUnit

TripUnit

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Figure 2.Connection diagram of Epic MicroVersaTrip system.

7-3 Trip Unit Current is sensed by the breaker CTs and trip isinitiated by the flux-shift trip device. Externalpower is not required for an overcurrent trip.The setpoints for these functions are selected withswitches on the front of the trip unit (EpicMicroVersaTrip) or with the front-panel displayand function keys (MicroVersaTrip PM).

• Metering- Current (all three phases)- Voltage (line-to-line and line-to-neutral)- Power (real and total)All the sensing for metered parameters dis-played at the FPU is performed at the trip unit.

Either Epic MicroVersaTrip trip units, shown inFigure 3, or MicroVersaTrip PM trip units, shown inFigure 4, may be used with the Epic MicroVersaTripsystem. These trip pnits perform the following func-tions:• Overcurrent protection- Long-time protection

- Instantaneous protection- Short-time protection (optional)- Ground-fault protection (optional)

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Epic MicroVersaTrip® SystemChapter 1. Introduction

MicroVersaTrip PROGRAMMER

IINSTANTANEOUS PICKUPCURRENT SETTING

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Figure 3 Epic MicroVersaTrip trip unit Figure 4. MicroVersaTrip PM trip unit.1-4 Field Programming Unit• Protective relaying

- Undervoltage- Unbalanced voltage- Unbalanced current

The FPU, shown in Figure 5, is the user interface forthe Epic system. Metering parameters, protective-relay set points, event information, and breaker sta-tus are all stored and displayed at the FPU. TheFPU’s memory is nonvolatile, so that information isretained even during loss of power.

Reverse powerOvervoltage

These parameters are sensed by the trip unit,with set points defined at the FPU. With PM trip The FPU has no role in the protective functions ofunits, the set points may be entered either at the the system. The communication link can be discon-FPU or at the trip unit itself. (See GEH-5891A nected with no effect on protection, including over-for details on defining set points at the PM trip current and protective relaying,unit.) Protective relaying requires external con-trol power at the trip unit.

1-5 Potential Transformers• CommunicationThe Epic MicroVersaTrip trip unit communi-cates with the FPU through a shielded, twisted- The Potential transformers serve as the voltage input

to the Epic system. Two or three PTs are required foreach feeder network, depending on the type of con-nection (delta or wye). Depending on the installa-tion, the PTs may be used for other purposes in theswitchboard.

pair link. The trip unit sends information, suchas metering and trip data, to the FPU throughthis link.I

3

Epic MicroVersaTrip® SystemChapter l IntroductionThe PTs typically scale the input voltage to 120 Vacat their secondaries. Voltage conditioners furtherreduce the output to a nominal 1.76 Vac, as requiredby the trip units.

RS-232 cable is installed in the switchboard. Thecable is terminated at a 25-pin male connectormounted in the vertical wire trough at the rear of theswitchboard section containing the FPU, as shown inFigure 6. If this option is not selected, the 25-pinconnector is attached to the back of the FPU.If the distance between the host computer and theFPU is less than 50 feet, the two can be directly con-nected. For longer distances, a modem is requiredfor reliable communications. A factory-wired four-line telephone cable connects to a terminal blockmounted in the vertical wire trough at the rear of theswitchboard section containing the FPU, Refer to GEElectronic Instrumentation and Control System HostInterface documentation (GEI-72110) for informa-tion on host communication.

1-6 Control PowerExternal control power is required for operation ofthe FPU and the metering, protective relaying, andevent enunciation functions. Input power may besupplied at 48 Vdc, 85 to 265 Vac, or 100 to 370 Vdc.The power supply converts the supply voltage to thelevels required by the Epic system.

1-7 Remote CommunicationsThe FPU is supplied with an RS-232 port that allowscommunication with a host computer. A nine-wire

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Figure 5. Field programming unit front panel.

4

Epic MicroVersaTrip® SystemChapter 1. Introduction

Figure 6. FIS-232 connector mounted in vertical wire trough.

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5

Epic MicroVersaTrip® SystemChapter 2, Detailed Description

2-1 Field Programming Unit Catalog # Description

TFPU2 No discrete inputs

120 Vac / 125 Vdc discreteinputs48 Vdc discrete inputs

InputsInputs to the FPU comprise

• Control power• FPU display and command keys• Metering and breaker status from trip units

• Discrete input contacts (optional)• Commands and data from the host computer

TFPU2DG1

TFPU2DG2Table 1. FPU catalog numbers.

2-2 Trip Units

OutputsOutputs from the FPU comprise

• Messages to the FPU display screen• Commands to trip units• External alarm signals• Data to the host computer

InputsInputs to the trip unit comprise the following:

• Control power• System current and voltage• Commands from the FPU• Status of the breaker contacts

System current inputs from the CTs are scaled bythe rating plug and voltage inputs from the PTs are

The RS-232 port of the FPU allows two-way commu- scaled by voltage conditioners. Both are then trans-nications between the FPU and a host computer. formed into digital signals by analog-to-digital con-

verters.

Communications

With suitable application software, the host com-puter can control data logging, maintenancescheduling, and diagnostic displays. Outputs

Outputs from the trip unit comprise the following:• Metering and breaker status to the FPU• Breaker trip signals because of phase overcun

rent, ground fault, or protective relaying• Front-panel display on MicroVersaTrip PM trip

units

Discrete Input Contacts MonitoringWhen this option is selected, a special 16-contact-pair terminal board is added to the FPU. Any con-tact-making device, such as an enclosure-door switchor transformer overtemperature alarm switch, canbe monitored by this function.The host computer can request the status of any ofthese contacts, which is then transmitted over theRS-232 link with the FPU. The status of discrete con- Epic MicroVersaTrip and MicroVersaTrip PM triptacts is not available at the FPU display screen. All units can be used with the Power Break circuitdisplays, reporting, and alarms are performed by the breakers listed in Table 2 and the type AKR circuit

breakers listed in Table 3.

Circuit Breaker Applications

host computer.Two versions of this option are available, for 120 Vac/125 Vdc or 48 Vdc control power.FPU Catalog NumbersThree versions of FPU are available, as described inTable 1. 'V •

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6iff:i8

Epic MicroVersaTrip® SystemChapter 2. Detailed Descriptionm

Protective FunctionSuffixType THPType TPShort-time overcurrentType THC STypeTCInstantaneous overcurrentType TUP IHigh-range instantaneous pickup

H-adjustableK-fixed (AKR-30S only)

HorTable2. Power Break circuit breaker types usable with EpicMicroVersaTrip and MicroVersaTrip PM trip units. K

G Ground faultAKR-8D-30H AKR-8D-50H

Zone-selective interlock:Z1-ground fault onlyZ2-ground fault and short time

Z1 orAKRT-8D-50HAKR(U)-8D-S0S Z2AKR-8D-75AKR(U)-8D-30

AKR-8D-100AKR(U)-8D-50 X Switchable instantaneous and ground fault(AKR only)

Table3. Type AKR circuit breaker frames usable with EpicMicroVersaTrip and MicroVersaTrip PM tripunits. Table5. Epic MicroVersaTrip trip unit catalog number suffixes

for optional protective functions.Epic MicroVersaTrip Trip Unit CatalogNumbersThere are three basic Epic MicroVersaTrip trip unitcatalog number prefixes, depending on frame sizeand sensor rating. The prefixes that determine theallowable current sensor ratings are listed in Table4, One of these is present on all trip unit catalognumbers, and is immediately followed by the letterL, indicating long-time overcurrent protection.

For example, a trip unit with catalog numberTS20LSH has the following functions:

TS20- trip unit for sensor rating from 150 to 2000amperes

L-long-time overcurrent protectionS-short-time overcurrent protectionH- high-range instantaneous pickup

MicroVersaTrip PM Trip Unit Catalog NumbersThere are three basic MicroVersaTrip PM trip unitcatalog number prefixes, depending on frame sizeand sensor rating. The prefixes that determine theallowable current sensor ratings are listed in Table6. One of these is present on all trip unit catalognumbers. Immediately following this prefix is theletter L, indicating long-time overcurrent protec-tion.

Current Sensor Ampere RatingsPrefix AKRPower Break

150, 400, 600, 800,1600, 2000

TS20 200, 400, 800,1000, 1600, 2000

2500, 3000TS32 3200TS40 4000 4000

Table 4. Epic MicroVersaTrip trip unit catalog number prefixesand corresponding current sensor ratings.

Additional letters are appended to the catalog num-ber to indicate installed protective functions, aslisted in Table 5. They are appended from left toright in the order given.

Current Sensor Ampere RatingsAKRPower BreakPrefix

150, 400, 600, 800,1600, 2000

200, 400, 800,1000, 1600, 2000

TT20

32002500, 3000TT3240004000TT40

Table6. Trip unit catalog number prefixes and correspondingcurrent sensor ratings.

7

~ Epic MicroVersaTrip® SystemChapterZ DetailedDescription

iAdditional letters are appended to the catalog num- 2-3 Rating Plugsber to indicate installed protective functions, as InTable 7. They are appended from left to right in the Each trip unit requires a rating plug. Rating plugsorder given. provide scaling and signal conditioning between the

current transformers and the analog-to-digital con-verters inside the trip unit. They are inter-changeable and are available with ratings of 100 to4000 amperes. Several rating plugs are available foreach sensor.

Protective FunctionSuffixShort-time overcurrentS

I Instantaneous overcurrentEach rating plug is keyed to a particular sensor.Each trip unit is configured at the factory to acceptonly the specific rating plugs for the sensors withwhich it is shipped.The indicator light and test jack are included in theradng plug.

Hor High-range instantaneousH-adjustableK-fixed (AKR-30S only)

K

G Ground faultZ1 or Zone-selective interlock:

Z1-ground fault onlyZ2-ground fault and short time

Switchable instantaneous and ground fault(AKR only)

Z2

Rating Plug Catalog NumbersCatalog numbers for the available rating plugs withtheir current ratings and associated sensor ratingsare listed in Table 9 for Epic MicroVersaTrip tripunits and in Table 10 for MicroVersaTrip PM tripunits.

X

Table7. MicroVersaTrip PM trip unit catalog number suffixesfor optional protective functions.

MicroVersaTrip PM catalog numbers contain anadditional one- or two-letter suffix to indicate thecommunication, metering, and relaying functionsinstalled, as shown in Table 8.

Suffix FunctionMetering, relaying, and communication

Metering and communicationPMM

Relaying and communication

Table 8. MicroVersaTrip PM trip unit suffixes for communica-tion, metering,and relaying.

P

For example, a trip unit with catalog numberTT32LSIG has the following functions:

TT32 - trip unit for sensor ratings greater than2000 and up to 3200 amperes.

L- long-time overcurrent protectionS-short-time overcurrent protectionI -standard instantaneous protectionG-ground-fault protection

8

Epic MicroVersaTrip® SystemChapter 2. Detailed Description

SensorRating, Amps

PlugPlugSensorRating, Amps Cat No.Breaker Frames Breaker FramesRatingRatingCat No.

TR1B60TR1B80TR1B100TR1B125TR1B150

60 60TR1S60TR1S80TR1S100TR1S125TR1S150

80 80150AKR30S, AKR30H 100100 AKRS0S, AKR30H150 125125 150150

100100 TR2B100TR2B150TR2B200

TR2S100TR2S150TR2S200

150 TP82, THP82TC82, THC82150200 200TP82, THP82

TC82, THC82 200200 150TR4B150TR4B200TR4B225TR4B250TR4B300TR4B400

150TR4S150TR4S200TR4S225TR4S250TR4S300TR4S400

200200 400 225 TP84, THP84TC84, THC84

AKR30S, AKR30H400 TP84, THP84

TC84, THC84AKR30S, AKR30H

225 250250 300300 400400 300TR8B300TR8B400TR8B450TR8B500TR8B600TR8B700TR8B800

300TR8S300TR8S400TR8S500TR8S600TR8S700TR8S80O

TP88,THP88TC88, THC88

AKR30S, AKR30HAKR50S, AKR50H

400400 450 TP88, THP88TC88, THC88

AKR30S, AKRS0HAKR50S, AKR50H

500800 800 500600700 600

700800 800400 TP1610, THP1610TP2510, THP2510TC1610, THC1610TC2510, THC2510

TR10S400TR10S600TR10S800TRIOS!000

400TR10B400TR10B600TR10B800TR10B900

TR10B1000

600 TC2510, THC2510TP1610,THP1610TP2510, THP2510

6001000 800 80010001000 900600TR16S600TR16S800TR16S1000TR16S1200TRI6SI600

1000TC1610, THC1610TP1616, THP1616AKR50S, AKR50H

800TR16B600TR16B800

TR16B1000TR16B1100TR16B1200TR16B1600

6001600 1000 8001200 TC1610, THC1610AKR50S, AKR50HTP1616, THP1616

10001600 11001600TR20S800TR20S1000TR20S1200TR20S1600TR20S2000

TC2020, THC2020TC2520, THC2520TP2020, THP2020TP2520, THP2520

AKRT50H

800 12001000 16002000 1200TR20B750TR20B800

TR20B1000TR20B1200TR20B1500TR20B1600TR20B2000

7501600 TC2020, THC2020TC2520, THC2520TP2020,THP2020TP2520, THP2520

AKRT50H

8002000 1000TR25S1600TR25S2000TR25S2500

1600 12002000TC2525, THC2525TP2525, THP2525

2500 2000 15002500 1600TR30S2000TR30S2500TR30S3000

2000 20002500 TC3030, THC30S0TP3030, THP3030

3000 TR25B1600TR25B2000TR25B2500

16003000 TC2525,THC2525TP2525, THP25252500 2000

TR32S1200TR32S1600TR32S2400TR32S3200

1200 2500AKR-753200 1600 2000TR30B2000TR30B2500TR30B3000

2400 TC3030, THC3030TP3030, THP3030

250030003200 3000TR40S1600TR40S2000TR40S2500TR40S3000TR40S4000

1600 1200TR32B1200TR32B1600TR32B2400TR32B3200

TC4040, THC4040TP4040, THP4040

AKR-100

2000 16002500 AKR75240032004000 3000 32004000 1600TR40B1600TR40B2000TR40B2500TR40B8000TR40B3600TR40B4000

Table 9. Epic MicroVersaTrip rating plug catalog numbers. 2000TC4040, THC4040TP4040, THP4040

25004000 3000

36004000

Table 10.MicroVersaTrip PM rating plug catalog numbers.

9

Epic MicroVersaTrip® SystemChapter 2. Detailed Description

2-4 Interchangeability Current SettingBreaker Family.5 X..6 X,.7 X, ,BX, .85 X,.9*.95X 1.OX

Power BreakThe trip unit is integral to the circuit breaker and isnot intended to be removed from the breaker. Therating plug is the only interchangeable elementWhen the breaker is shipped, the trip unit is keyedto the specific sensor (CT) installed in the breakerand will only accept rating plugs intended for thatsensor.

.5*.6X; .7X, .8 X, .9X,.9sx; i .ox; 1.1X

AKR

Table 11.Ranges of values of current setting as a fraction ofrating plug ampere rating: X.

NOTE; Rating plugs are interchangeable only Long-Time Pickup and Delaybetween trip units of the same type and sensor rat-ing. They are not interchangeable between EpicMicroVersaTrip trip units and MicroVersaTrip PM •trip units.

Long-time delay allows temporary overloads withouttripping for such loads as motor starting and weld-mg.The long-time pickup is fixed at 1.1 times the cur-rent setting, C, for Power Break and 1.0 for AKRbreakers.The four time-delay bands provide increas-ing time to trip for any given overload current. Forexample, for an overload of 600% of the current set-ting, the nominal time delays for the four bands are2.4, 4.9, 9.8, and 20 seconds.

CAUTION: Removing a trip unit and installing it in abreaker with a different sensor rating may result indifferent overcurrent-protection characteristics. It isstrongly recommended that the trip unit not beremoved from its breaker under any circumstances.If the trip unit is, however, removed from a breaker,it must be reinstalled in the same breaker or abreaker with the same frame and sensor ratings.Removal of a trip unit requires readdressing of thebreaker, since the address is stored in the trip unit

Indicator LightWhen the current reaches .96 of the long-timepickup setting, the indicator light on the radng plugstarts flashing. When the breaker load current isgreater than the pickup threshold, the light stays oncontinuously. For MicroVersaTrip PM trip units,“PICKUP” appears on the front-panel display.2-5 Overcurrent Functions

Following are descriptions of the overcurrent-pro-tection functions available with Epic MicroVersaTriptrip units. Functions are standard unless indicated asoptional. For descriptions of the functions availablewith MicroVersaTrip PM trip units, see GEH-5891A.

Short-Time Pickup and Delay (Optional)This feature, identified by catalog number suffix S,allows the breaker to carry a high current for a shorttime. The pickup current is selected as a multiple ofthe current setting. The range of values is 1.5C, 2C,2.5C, 3Q 4C, 5a ?C; and 9C.Current Setting

The current setting, C, is the current that thebreaker will carry indefinitely without tripping. It is The adjustable short-dme delay allows coordinationset as a fraction of the ampere rating of the rating among upstream and downstream breakers thatplug, X The ranges of values for Power B reak and have the same short-time pickup setting. The switchAKR circuit breakers are listed in Table 11. can be set to place the I2t section of the short-time

trip curve either in or outWhen the switch is set to 1^ OUT, the trip time ifdetermined by the constant time-delay bands. For ^the MIN, INT, and MAX settings, the time delays atthe lower limits of the bands are .10, .21, and .35 sec-ond, respectively. ,:'W&

10

Epic MicroVersaTrip® SystemChapter 2. Detailed Description

With Short-TimeFrame Size (A) Without Short-Time1.5, 2, 3, 5, 7, 9, 10, 13, 151.5, 2, 3, 5, 7, 9, 10800, 1600, 2000

1.5, 2, 3, 5, 7, 9, 10, 131.5, 2, 3, 5, 7, 9, 102500, 30001.5, 2, 3, 5, 7, 9 1.5, 2, 3, 5, 7, 94000

Table 12. Adjustable instantaneous pickup settings, as a multiple ofX.

When the switch is set to I2T IN, the trip time isdetermined by the I2t section of the curve, with adelay of .40 second at 600% of C. If the fault currentmagnitude is high enough, the time delay switchesto the constant-delay band corresponding to theswitch setting of MIN, INT, or MAX.

Frame Size, inAmperes Ground-Fault Pickup Settings

800, 1600, 2000 .2, .25, .3, .35,.4, .45, .5, .6.2, .22, .24, .26, .28, .3, .34, .372500, 3000

.2, .22, .24, .26, .28, .34000

Table 13.Ground-fault pickup settings.When the switch is set to FT OUT, the trip time isdetermined by the constant time-delay bands. Forthe MIN, INT, and MAX settings, the time delays atthe lower limits of the bands are .10, .21, and .35 sec-ond, respectively.When the switch is set to PT IN, the trip time isdetermined by the I2t section of the curve, with adelay of .40 second at 600% of C. If the fault currentmagnitude is high enough, the time delay switchesto the constant-delay band corresponding to theswitch setting of MIN, INT, or MAX.

Instantaneous PickupInstantaneous pickup provides immediate (no inten-tional time delay) interruption of severe overloads.One of the following choices must be made whenspecifying a trip unit

1. Adjustable Instantaneous - The range ofadjustments depends on the breaker framesize and on whether short-time pickup isincluded. The settings are specified as a multi-ple of the ampere rating, X, of the rating plug.Table 12 shows the possibilities.

2. High-Range Instantaneous - High-rangeinstantaneous pickup is fixed at 100% of theshort-time rating.

w

Zone-Selective InterlockZone-selective interlock allows the breaker closest toa fault to trip first, thus preventing upstream break-ers from tripping unnecessarily. It is available in twoversions:

• ground fault only (Cat. No. suffix Zl) or• ground fault and short time (Cat. No. suffix

Z2).One or more zone-selective-interlock modules [CatNo. TIM1 (120 Vac input) or TIM2 (125 Vdcinput)] must be used with this option. Refer toinstruction book, GEK-64467, for connection details.Whenever a breaker goes into ground-fault pickup(Zl) and/or short-time pickup (Z2) and the fault-current magnitude is such that the constant-timedelay is in effect, a signal is sent to the upstream

Ground-Fault Pickup and Delay (Optional)Ground-fault pickup settings are adjustable, with nosetting exceeding 1200 amperes, to comply with theNational Electrical Code, Section 230-95. The set-tings are multiples of the sensor ampere rating, $and are dependent on frame size, as shown in Table13. Ground-fault pickup is identified by catalognumber suffix G.Adjustable ground-fault delay allows for coordina-don among upstream and downstream breakers thathave the same ground-fault pickup setting. Theswitch can be set to place the I2t section of theground-fault trip curve either in or out

11

Epic MicroVersaTrip® SystemChapter 2. Detailed Descriptionbreaker through the zone-selective-interlock mod-ule. This signal causes the upstream breaker’s delayband (ground fault for Zl, both ground fault andshort time for Z2) to change from minimum to theactual setting.Note that a trip unit with the zone-interlock optionwill time out on the minimum delay band forground fault and/or short time (depending on theoption selected) if it receives no signal from a downrstream interlock module. The actual settings aremeaningful only when a zone-interlock signal isreceived.

2-6 Neutral-Current TransformersNeutral-current transformers are required on four-wire systems if the trip unit has ground-fault protec-tion.If the load circuit does not include a neutral (forexample; three-phase, three-wire systems), the neu-tral-sensor terminals on the circuit breaker are leftopen. Do not short these terminals.

/ When a neutral is included in the load circuit,neutral-sensor line and load markings must berespected when making bus or cable connections.The polarity of connecting wires from the secondaryof the neutral sensor to the circuit breaker must alsobe observed, with white connected to white andblack to black.A neutral sensor can only be used with a breakerwhose sensor rating, S, matches the tap setting onthe neutral sensor.

2-7 WiringBreaker current transformers are wired at thefactory. For information on wiring, refer to theequipment front view and the elementary electricaldiagrams.

' > >X

12

, ' . ” V • .*• v V 1 1' ’ 1* •s 4

Epic MicroVersaTrip® SystemChapter 3. System Operation1

3-1 FPU FaceplateThe Epic MicroVersaTrip FPU communicates withthe individual breakers’ trip units. The EpicMicroVersaTrip FPU faceplate, shown in Figure 5,contains an easy-to-use keyboard that allows theoperator to set and modify system parameters and isarranged for ease of operation. The vacuum fluores-cent display allows the operator to view system valuesand events regardless of lighting conditions.The screen automatically blanks if no key is pressedfor approximately 15 minutes. To reactivate the FPUscreen, simply press one of the function keys.

Figure8. SET-UP SYSTEM key.

and breaker parameters. As with the other functionkeys, it is always active and has a section that lightsOn the left side of the faceplate is a group of four when this function is in use.

orange keys, labeled VIEW METERS, VIEWSTATUS, VIEW / CHANGE SET POINTS, andVIEW EVENTS, as illustrated in Figure 7. These keys 3-3 Action and Command Keysare always active, so the operator can call any ofthese functions at any time. These keys have LEDsections that light to indicate the currently activeoperating mode. The functions are described indetail in a later section of this manual.

3-2 Function Keys

The remainder of the keys on the faceplate areaction and command keys, used to monitor andmodify parameter values. These are describedbelow.

Last Display / Last eventNext display / Next eventThese two keys, located directly below the displayscreen, allow the operator to scroll through thescreens for each operating mode. The LASTDISPLAY / LAST EVENT key brings back theprevious display screen. The NEXT DISPLAY /NEXT EVENT key advances the display to the nextscreen.

3*<cfmiVfewr— l ' SELEC

, BREAKmmm ISM

( )VIEW STATUS g PROGRV:

( )VIEW/CHANGE ^SET POINTS 'i CUEA

• ft ( )VIEW EVENTS & HEL Select BreakerThe SELECT BREAKER key, the first of four in agroup to the right of the function keys and illus-trated in Figure 9, allows the operator to choose thebreaker for which information is to be viewed ormodified. This action may be performed in all oper-ating modes except VIEW EVENTS.

1 5 . 9

Figure 7. Function keys on left side of FPU faceplate.To the right and above this group is a white keylabeled SET-UP SYSTEM, as shown in Figure 8. Thiskey is typically used during system installation, con-figuration, or modification, as when breakers arebeing added to or deleted from the system. It allowsthe operator to view and modify general system-wide

I

13

Epic MicroVersaTrip® SystemChapter 3. System Operation

entry is made, press ENTER again to select thebreaker.

ProgramThis function allows the operator to selectively mod-ify all Epic parameters from the FPU. When thevalue to be modified is displayed on the screen,press the PROGRAM key. You will then beprompted to enter the password, after which (if thecorrect password is entered) the FPU displays anediting screen.The editing screen displays the current value for theparameter and provides an area for the operator toenter a new value, initially filled with *#’ characters,one for each digit. As each digit is entered, itreplaces one of the pound signs. After entry is com-plete, press ENTER to update the parameter withthe new value.Certain Epic parameters must be selected from afixed set of values. In these instances, press the ‘O'key to display the next available selection. When thedesired value is displayed, press ENTER to updatethe parameter with that value.Any incorrect values are easily changed. PressingCLEAR removes all the entered digits. The promptarea is again filled with pound signs.ClearThe CLEAR key can be used for the following func-tions:

• Reset metering values (energy consumption,peak capacity, and peak demand).

• Remove breakers from FPU recognition.• Clear individual events.• Abort entry of new parameter values, screen

numbers, and breaker addresses.To perform any of these operations, select the valueto be cleared by displaying it on the screen, thenpress CLEAR. The FPU prompts for the password; ifthis is entered correctly, it then requests confirma-tion that the displayed value is to be reset. PressENTER to perform the reset; otherwise, CLEAR tcancels the operation and the value is unchanged.

Figure 9. Group of four action and command keys,

There are two ways to select a breaker:• After pressing the SELECT BREAKER key, press

either NEXT DISPLAY or LAST DISPLAY. Thelatter keys cause the FPU to sequentially displaythe addresses of each of the defined breakers.When the desired breaker’s address appears,press ENTER to select that breaker.

• The desired breaker’s address may also beentered directly. After pressing SELECTBREAKER, press the CLEAR key. The string,_ appears on the FPU display, with the‘A’ flashing periodically. The NEXT DISPLAYand LAST DISPLAY keys cause the display toscroll through the available characters. Whenthe desired character appears, press ENTER tomove on to the next position. After the last

A

14• %

VAi-...

r •

Epic MicroVersaTrip® Systemi

Chapter 3. System OperationSpecific examples are given below under thedescriptions of the other keys.

HelpThe HELP key may be pressed at any time to obtainon-line information about the current operatingmode. Press NEXT DISPLAY or LAST DISPLAY toscroll through all the help information available forthe current mode. Press CLEAR to return to theoperation.

Silence AlarmThe orange SILENCE ALARM key, shown in Figure10, is to the right of the SET-UP SYSTEM key andabove the numeric keypad. When an event occurs,this key lights up, indicating that a new, unviewedevent has been stored in the FPU. Additionally, a setof contacts closes inside the FPU. These contacts areaccessible through external terminals and may beused to control an audible alarm. Typically, they arefactory wired to the vertical wire trough in the rearof the switchboard section containing the FPU.Pressing the SILENCE ALARM key causes these con-tacts to open, turning off the audible alarm. TheSILENCE ALARM key remains lit until the newevent is viewed. If multiple new events are recorded,the key remains lit until all new events have beenviewed.

m Figure 11. Numeric keypad and ENTER key.

SILENCE ALARM key, allows the entry of numericcharacters.EnterThe ENTER key, located below the numeric keypad,as shown in Figure 11, confirms and stores the entryof a new parameter value.Command BlockThe command block, illustrated in Figure 12 andfound on the right side of the faceplate, contains alist of the metering, status, and relay set-pointscreens. The screens are listed in the order in whichthey appear as the operator scrolls through eachfunction. The number corresponding to eachscreen can be used to access it directly, rather thanscrolling through the list, as is described below inthe operation of the function keys.

Figure 10. SILENCE ALARM key

KeypadThe numeric keypad, illustrated in Figure 11 andfound in the center of the faceplate below the

15Ihk*-.

Epic MicroVersaTrip® SystemChapter 3. System Operation

RelaySetpointsCode Meter Status

Current Self Test1 UV Limit

2 Voltage L*N Breaker UV Delay

. • : Over Current VU LimitVoltage L»l3 .\

:• VRelayEnergy KWH VU Delay\• 0

$ /v \v Present Demand KW CU Limit

Real Power KW '

6 ;CU DelayS’

7 PR Limit

: : TO.,IPower KVA . __ _ \i,, POW P,O,M - VU

:il Cap,c.„ J' 12 1 ^

PR Delay

•V:V**-*''** •

1*^ \iV-*—

Figure 12. Command block, containing list of screens and theirsequence.

*

- 16

V*.VrtyrH'AI*J*I*«-*A "»J >«"**.*.*..*-"

Epic MicroVersaTrip® SystemChapter 4. Installation

4-1 Overview 4-3 System SetupInstallation of an Epic MicroVersaTrip system With control power on, measure the voltages at therequires only control power. The installation tasksinclude assignments of breaker addresses and set-ting system parameters.The specific parameters involved during the systemsetup are as follows:

• System Parameters- Date- Time- Demand interval- Host communication baud-rate selection (ifapplicable)

- Host-communication parity selection (ifapplicable)

- Host-communication stop-bit selection (ifapplicable)

• Breaker Parameters- Breaker address- Breaker activated/deactivated- Breaker potential transformer rating- Breaker potential transformer configuration- Sensor rating for TSM1 metering module- Power-flow direction

rFPU rear connectors with a dc volt meter.Connector 1 (Cl ) is the left connector, connector 2(C2) is on the right The pin numbers are shown ona label on the back of the FPU. Insert the meterprobes with the external communication leads inplace. The maximum and minimum voltages forthese measurements are listed in Table 14.

FPUTerminal

Nos. Voltage Range (dc)Min Max

+4.75VC2-1 8c C2-4 +5.25VC2-5 & C2-4 +11V +13 VC2-6 8c C2-4 -11V -13VCl-1 & Cl-2 +23V +25VCl-6 & Cl-5 +15V +25V

Table 14. Voltages measured at FPU terminal block.If the voltages are within limits, reset the FPU bycycling the control power on and off. The FPU willthen perform a self-check of its internal hardware.During this mode, the display will contain thefollowing message:

4-2 Password Protection Self Test In

ProgressA password must be assigned before the system canbe used. The instructions for password definitionare sent to one person at each facility. It is this per- The self-test may take 10-30 seconds to complete,son’s responsibility to assign the system password After a successful seif-test, the time and date are dis-and to share this information with the appropriate played. A failure message or a blank screen indicatepeople. a malfunctioning FPU or a lack of control power.Note that once the local password has been Removing the control-power fuse (or turning theassigned, it is impossible to recall it from the FPU. If circuit breaker off) Is the only way to completelyit is forgotten, a new local password must be shut off power to the FPU.assigned.The system-setup tasks can be performed as soon asthe local password has been assigned.

Date and TimeTo change the system date and time, press the SET-UP SYSTEM key while the date and time are on thedisplay. The display then shows the current softwareversion and verifies that setup mode is operating:

i

17

Epic MicroVersaTrip® SystemChapter 4. Installation

System Configuration Enter date mm/dd/yyyy

Setup. Version x.xx ##/##/####

Enter the date with the numeric keypad and pressENTER when finished. For example, if the date isAugust 3, 1992, press 08031992 ENTER.

Press NEXT DISPLAYto display time of day:

Time of day hh:mm:ss

14:26:414-4 System Parameters

To change the current time, press the PROGRAMkey. The system then asks for the password: Demand Interval

Press NEXT DISPLAY to move to the systemdemand-interval display. The present demand inter-val and the available choices are shown:

Enter Password

# # # # #

Demand IntervalEnter the assigned local password and press ENTER.If the proper password is entered, the displaychanges to the following: (05,15,30,60) 15 Min

The demand interval (the sliding time period forwhich demand is accumulated for all breakers) isinitially set at 15 minutes. To change the interval,press the PROGRAM key to get the following dis-play:

Enter time hh:mm:ss

# # : # # : # #

Enter the current time on the numeric keypad,using a 24-hour clock, and press ENTER when fin-ished. For example, if the current time is 7:05 p.m.,press 190500 ENTER.If the entry is made correctly, the display changes tothe date screen, shown below. The screen may blankafter the time change if the new time is more thanabout 15 minutes different from the previous value(the FPU has, in effect, been fooled into thinkingthat no key has been hit for that long). If so, pressSET-UP SYSTEM, then NEXT DISPLAY to scroll tothe time screen.Note that the FPU will not adjust for daylight savingstime. The time must be changed correspondingly bythe operator.

rEnter Demand Intrval

Old = 15, New = ##

Enter one of the four allowable intervals (5, 15, 30,or 60), then press ENTER

Communication ParametersThe next display shows the baud rate:

Host Baud Rate

9600 Baud

To select a different baud rate, press PROGRAM toobtain the following display:

Date mm/dd/yyyy

08/03/19929600 Baud— To change the month, day, and year, press the

PROGRAM key.The date-entry display appears: Press '0' to toggle

18

&H. Epic MicroVersaTrip® SystemChapter 4. Installation

m

’

Press the 0 key to cycle the baud rate through arange of values (110, 300, 1200, 2400, 4800, 9600).When the proper value has been reached, pressENTER to make the selection.The next display shows the number of host data bitsfor the RS-232 line:

U V W X Y Z 0 1 2 3 4 5 6 7 8 9 $ % & * - + « .(blank). No definition of the address format is nec-essary, so different breakers in the same system mayhave addresses of any length and character combina-tion that obeys these simple rules.Since the address-definition scheme is so flexible, wesuggest that the names be assigned in a distinctivefashion. Two possibilities are as follows:

• Assign breaker names based on their functions.BOIL1 could be assigned to the breaker associ-ated with boiler #1, GEN-4 to the breaker forgenerator #4, EMR2 for emergency shut off #2,and so on.

• Assign addresses to breakers based on theirlocations in the switchboard. Thus, 2B3 couldindicate the breaker located in substation 2,stack B, position 3.

It is also good practice to document the breakernames and configuration information for later useby service personnel. A suggested worksheet for doc-umenting breaker configuration information is pro-vided in this manual.

Host Data Bits

Eight Data Bits

To change the number of data bits per transmissionbyte, press PROGRAM, then press the 0 key to tog-gle between the two allowable values (seven oreight).The host stop-bit display appears next:

r Host Stop Bits

One Bit

4 To change the number of stop bits, pressPROGRAM, then press the 0 key to toggle betweenthe two allowable values (one or two). Press ENTERto store the new value.The final communications display shows host parity:

I uAdding Breakers to the SystemBefore beginning breaker-address definition, ensurethat all breakers to be added to the system areracked in and have control power. Then press the

. SET-UP SYSTEM key, enter 8 from the numerickeypad, and press ENTER. The display shows thenumber of breakers that have been defined:

Host Parity

No

To change the parity, press PROGRAM, then pressthe 0 key to cycle among the choices (odd, even, orno parity). Press ENTER to store the new value.

System has 0

breakers defined

This screen may be viewed at any time.Note that if one or more breakers have already beendefined, the installed breakers’ addresses are dis-played. In this case, press CLEAR instead of SELECTBREAKER to reach this display and add a newbreaker.When this display is activated for a new breaker, the‘A’ in the first character position is flashing. PressNEXT DISPLAYor LAST DISPLAY to cycle throughthe available characters, as defined above.When thedesired character is reached, press ENTER. The

4-5 Breaker Parameters

NOTE: Power Break breaker address assignmentshould be carefully planned. Use an aid, such as aone-line diagram of the system, to determine suit-able names for each breaker.Address DefinitionBreaker addresses may be between two and fivecharacters long. Each character may be one of thefollowing: A B C D E F G H I J K L M N O P Q R S T

19

Epic MicroVersaTrip® SystemChapter 4. Installationflashing ‘A* appears in the second character posi-tion, while the first position contains the selectedcharacter.This procedure must be repeated for all five posi-tions. Any unused positions, such as with a two-,three-, or four-character name, must be filled withblanks.

PT Primary Rating

277 Volts #FEEDl

To change the rating, press PROGRAM, whichchanges the display to the following:

Enter PT Rtg (Volts)Blanks may be placed anywhere in the breakername. The digits 0 to 9 may be selected by pressingthe numeric keypad, as well as by scrolling. Old- 277 New=#####

After the fifth character has been entered, the fol- To determine the correct PT primary rating, refer tolowing screen is displayed (the breaker name is the name plate of the potential transformer supply-assumed to be FEED1): ing 120 volts to the voltage conditioners. Forinstance, for a 480:120 transformer, the value to beentered is 480 volts. Incorrect definition of the PT pri-mary rating will result in incorrect metering values. Enterthe new rating with the numeric keypad, then pressENTER. The display changes to show the breakerstatus for monitoring by the FPU:

Add breaker

#FEED1to system?

To signify yes, press ENTER; otherwise, press SET-UP SYSTEM to start over. If the answer is yes, thefollowing two messages alternate on the screen: Breaker is

Turn any switch or Deactivated #FEED1in selected breaker If a breaker is activated, the FPU periodically per-forms self-tests on that breaker. If the Power Break

trip unit does not respond to a request by the FPU(such as when a breaker is racked out), the FPU logsa failure event.

r pull rating plug

in selected breaker

CAUTION: We recommend that breakers be deacti-vated before they are racked out, so that unneces-sary failure events are not recorded. When a breakeris reinstalled, reactivate it to ensure that it is con-stantly monitored by the FPU.The overcurrent or protective-relaying functions ofthe breaker are not affected by its activation status.Deactivating a breaker simply means that its tripunit is not monitored by the FPU and no failureevents are logged.To change the activation status, press PROGRAM,then press 0 to toggle between the two states. PressENTER to confirm the change. The above displayreappears with the new status shown. Press ENTERagain to advance to the next display:

If the breaker to be added is equipped with an EpicMicroVersaTrip trip unit, turn any switch and returnit to its original position, or pull out and reinsert therating plug. If a MicroVersaTipl PM trip unit isinstalled, press any function key on the front panel.The indicator light on the rating plug will startblinking to indicate the selection. Press ENTER toget the message,

Successful addition

Press Enter #FEED1

The nesft display shows the PT primary rating:?;

20. :i» HI.

.w

I Epic MicroVersaTrip® SystemChapter 4. Installation

f

been successfully defined, the display will show thisvalue:Pot. Xfrmer Connect!

#PEED1Not SetupBreaker Rating Plug

This screen identifies how the potential transform-ers are connected with the primary bus. If the PTprimary is a four-wire connection, the selectionshould be wye. If the PT primary is a three-way con-nection, the selection should be delta. To make theselection, press PROGRAM, after which the follow-ing appears on the display (with the current connec-tion shown):

#FEED13000 Amps

Current Rating for Metering ModuleInstead of the rating plug value as defined above,the metering module requires the entry of thebreaker sensor rating.The initial display is

Breaker RatingPT Connect Wye

#TSMlNot SetupPress "0" to toggle

To set the sensor rating, press PROGRAM, whichchanges the display to the following:

Press 0 to alternate between the two choices. PressENTER to complete the selection and confirm yourchoice:

Breaker Rating AmpsPot. Transformer

01d=3000 ,New=*####Connect Delta #FEED1

Enter the new rating from the numeric keypad andpress ENTER. The setting is then confirmed by areturn to the previous display.Press ENTER again to display the power-flow status:

Power flow fromModification of Breaker Current RatingThe current rating of a Power Break breaker ischanged by replacing the rating plug in its trip unitIf the breaker has an assigned name, this name willbe retained. The new breaker rating is automaticallyindicated in the system-setup screen. To prevent acommunication-failure event, deactivate the breakerbefore removing the old rating plug. Reactivate thebreaker after the new rating plug is installed.

Line to load #FEED1

The two choices are line to load or load to line. Thenormal configuration is with the line side enteringthe top of the breaker. If the application requiresthe line side to be connected to the bottom of thebreaker, change this setting to load to line to definereverse flow as the standard. (This is needed forproper reverse-current protective relaying andenergy-flow accumulation.)To change the preferred direction of power flow,press PROGRAM, then the 0 key to toggle betweenthe two alternatives. Press ENTER to reconfirm thechoice.Press ENTER to display the breaker current rating.This value must be identical to the X value printedon the front of the rating plug. If the breaker has

Adding Another Breaker to the SystemTo add another breaker, press SET-UP SYSTEM,then 9 on the keypad, and ENTER.The display indi-cates the last breaker whose parameters werereviewed:

@1 System Information

for breaker #FEED1

21

Epic MicroVersaTrip® SystemChapter 4. InstallationPress SELECT BREAKER, then CLEAR to reach thefollowing display;

Enter Breaker Addr

A

The sequence from this point is identical to that forinstalling the first breaker, described above.Removinga Breaker from the SystemA breaker may need to be removed during systemreconfiguration, elimination of a breaker, or if abreaker has been defined with an incorrect name.To begin the process, press SET-UP SYSTEM, then 9on the keypad, and ENTER.The display is similar tothe following:

System Information

for breaker #FEED1

To display the breaker to be removed, select it usingthe SELECT BREAKER function described above.Press CLEAR to enter the breaker-removal modeand display the following:

Remove breaker

from system? #FEEDl'

Press ENTER to remove the displayed breaker fromthe system or CLEAR to cancel the operation. Thelocal password is required each time a request ismade to remove a breaker from the system.

22

Epic MicroVersaTrip® SystemChapter 5. Operation of Function KeysJ

V1 Any of the screens listed under "Meter” on the com-mand block can now be displayed. Information ispresented for the breaker currently selected. Atpower up, the FPU selects the first breaker inalphanumeric order for viewing. To display otherscreens on the command-block list, press NEXTDISPLAY to move down the list and LAST DISPLAYto move back up.If NEXT DISPLAY is pressed while the last screen isdisplayed, the FPU emits a short beep and the keyno longer operates. The same is true if LASTDISPLAY is pressed while the first screen is dis-played.The following parameters are metered for eachbreaker with an Epic MicroVersaTrip orMicroVersaTrip PM trip unit and are listed on thecommand block for display in this mode:• Phase rms current• Line-to-neutral rms voltage• Line-to-line rms voltage• Energy flow in kWH• Present demand in kW• Peak demand in kW• Real power in kW• Reactive power in kVAR• Total power in kVA• Power factor• % capacity• Frequency

The status of the auxiliary switch, which indicateswhether the breaker is open or closed, affects themetering values displayed. The FPU polls the auxil-iary switch every minute and adjusts the meteringaccordingly. Thus, from the time a breaker isopened or closed, there may be a delay of at mostone minute before the new condition is reflected inthe metering screens.Most meter displays are updated every three sec-onds. Each of the displays is described below, in thesequence in which they appear.

5-1 Displaying ScreensThe Epic MicroVersaTrip system provides two meth-ods for displaying a specific screen in any of thefunction modes.• Press the key for the desired mode, then press

LAST DISPLAY or NEXT DISPLAY to scrollthrough the screens in the order listed in thecommand block.

• Press the key for the desired mode, then findthe number of the desired screen from thecommand block. Enter this number on the key-pad, then press ENTER to immediately displaythat screen. This direct-access method may berepeated any number of times.

It is also possible to select a parameter (such as“Real Power kW”) for a particular breaker, thenobtain the value of the same parameter for differentbreakers. Select the screen of interest, then pressSELECT BREAKER. Press LAST DISPLAY or NEXTDISPLAY to change the breaker number. PressENTER after the breaker of interest is displayed to

* obtain the desired parameter value for that breaker.This feature is available with the functions VIEWMETERS, VIEW STATUS, and VIEW / CHANGESET POINTS.NOTE: MicroVersaTrip PM trip units allow meteringof breaker parameters, viewing breaker status, andsetting up breaker protection parameters at the tripunit using the front panel display and function keys,as described in GEH-5891A. These functions mayalso be performed on the FPU, as described below.Epic MicroVersaTrip trip units require use of theFPU for these functions.

5-2 View MetersPressing VIEW METERS brings up the followingdisplay:

Meter

f Displays

23

Epic MicroVersaTrip® SystemChapter !). OperationofFunction Keys

Every 15 minutes, the FPU reads the energy flowfrom the breaker and updates the value in its ownnonvolatile memory.Thus, if control power is lost orif the breaker is racked out, the energy-consumptionhistory to date is retained in the FPU. When the sys-tem is re-energized, the energy-flow accumulationcontinues as before.Since the FPU updates its memory every 15 minutes,the energy consumption may be lost from as muchas the last 15 minutes before a control-power loss.The FPU indicates if a loss of energy consumption issuspected. Refer to the section describing the VIEWEVENTS function for the appropriate event display.To clear the FPU energy accumulator, first call upthis display, then press CLEAR. Enter the correctpassword, then press ENTER to return the accumu-lator to zero.The energy value does not change when the breakeris open. The value may be negative when power isflowing from the load to the line side.The value is updated every three seconds when theenergy display is active. The display automaticallyswitches to MWh when the value exceeds 9999.9kWh. The accuracy is 4 to 5%.

Phase RMS Current Display

la* 1450 lb- 1590

les 1600Amps #FEED1

This display shows the rms phase currents in ampsin the three phases for the selected breaker. Sincethese are instantaneous values, they will change asthe load fluctuates. If the breaker is open or if thecurrent magnitude is below 5% of the rating-plugvalue, all the currents are shown as 0. Values aregiven to the nearest ampere.Line-to-Neutral Voltage Display

Va-n= 277 Vb-n* 276

#FEED1Vc-n=s 276

This display shows the rms line-to-neutral voltagesfor the three phases of the selected breaker. Thesevalues change as the load fluctuates. Values are dis-played to the nearest volt.Line-to-Line Voltage Display

Demand DisplayVa-b= 477 Vb-c= 479

15 MinDemandVc~a= 480 #FEED1

#FEEDl123 KWThis display shows the rms line-to-line voltages forthe three phases of the selected breaker. These val-ues change as the load fluctuates. Values are dis-played to the nearest volt. This screen is not dis-played if the PT primaries are connected in a deltaconfiguration.

yThis display shows the demand in kW in the lastinterval for the selected breaker. Note that the inter-val is defined during system setup. The possibleselections are 5, 15, 30, and 60 minutes. The displayautomatically switches to MW when the valueexceeds 9999 kW.Energy-Flow Display

r Peak-Demand DisplayEnergy from 01/20/92

Peak Demand 246KW4293.7KWH #FEEDl

01/20/92 13:25#FEEDlThe energy-flow measurement is performed at thetrip unit and communicated to the FPU.The displayshows the total energy flow and the date from whichit was accumulated for the selected breaker.

This display shows the peak demand and the dateand time at which it occurred on the selected

24

ml"1"

Epic MicroVersaTrip® SystemChapter 5. Operation of Function Keys

9 breaker, since the last time it was reset To reset the play automatically switches to MVA if any of the val-peak demand to zero, press CLEAR, enter the pass- ues exceeds 9999 kVA.word, then press ENTER.

;•

Power-Factor DisplayReal-Power Display

PF a=.95Lag b=.89Lagf

Real Poweri

c».91Lag #FEEDl1

#FEED1823KWori

! This display shows the real power flowing throughthe selected breaker. The value may be negativewhen power is flowing from the load to the line sideof the breaker. It is zero when the breaker is open.The display automatically switches to MW when thevalue exceeds 9999 kW.

Power Factor 1,00!

Lagging #FEEDl

If the PT primary connection is wye, this displayshows the power factor for each phase at theselected breaker. If the PT primary connection isdelta, the aggregate power factor is displayed. Whena breaker is open, its power factor is shown as 1.00.

Reactive-Power Display

Reactive Power

Peak-Capacity Display105Kvar #FEED1

rThis display shows the reactive power flowingthrough the selected breaker. The displayed valuemay be negative for a capacitive load. The value iszero when the breaker is open. The display automat-ically switches to MVAr when the value exceeds 9999 This display shows the peak percent capacity that

has flowed through the selected breaker, with thedate and time at which it occurred. The peak capac-ity is the ratio of the maximum current through thebreaker to the rating-plug value.To reset the value to zero, press CLEAR, then enterthe password, and press ENTER.

Peak Capacity 60%

01/20/92 09:Q0#FEED1

kVAr.Total-Power Display

Ta« 300 Tb= 289

Tc= 305 Kva #FEED1

Frequency Displayor

FrequencyTotal Power

#FEEDl60.1Hz#FEEDl0 Kva

This display shows the frequency of the current inthe system, to the nearest 0.1 Hz, as measured at theselected breaker.

If the PT primary connection is wye, this displayshows the total power flowing through each phase inthe selected breaker. If the PT primary connectionis delta, the aggregate total power is displayed. Allvalues are zero when the breaker is open. The dis-

5-3 View StatusiThe VIEW STATUS key is used to display the follow-ing status information:

25

Epic MicroVersaTrip® SystemChapter 5. Operation of Function Keys

This display is not available with the TSM1 meteringmodule.• Device status

• Functional self-test• Breaker position• Overcurrent• Protective relaying

Overcurrent Status Display

Over Current Status

Normal #FEEDlDevice Status Display

This display shows the present overcurrent-protec-tion status of the selected breaker. The possiblemodes are normal, time-overcurrent trip, ground-fault trip, and instantaneous trip. This display is notavailable with the TSM1 metering module.

Device Status

Displays

This display indicates that VIEW STATUS has beenpressed. This function allows access to the displayslisted under “Status” in the command block.Individual screens are viewed by the methodsdescribed under the above section, “AccessingScreens.”

Protective-Relaying Status Display

Protective Relaying

Status Normal #FEED1Functional Self-Test Display

This display shows the present protective-relayingstatus of the selected breaker. The possible modesare normal, undervoltage trip, voltage-unbalancetrip, current-unbalance trip, power-reversal trip, andovervoltage trip. This display is not available withthe TSM1 metering module.

Functional Self Test

#FEED1Passed

This display shows the result of the self-test of theselected breaker.The FPU performs a self-test while other tasks aredormant or waiting. The self-test consists of checksof the integrity of ROM, nonvolatile memory, andperipheral devices. If a failure is detected, the FPUstores the event and starts the alarm. The RAM isparity checked in hardware. The processor is inter-rupted if a parity failure occurs.The FPU polls each trip unit for its self-test status.Failures are stored in the event buffer and the alarmsequence is started.

5-4 View/Change Set Points

Device Set

Points Display

This display indicates that VIEW/CHANGE SETPOINTS has been pressed. This key allows access tothe screens listed under “Relay Setpoints” in thecommand block. Individual screens are viewed bythe methods described under the above section,“Accessing Screens.”This function is used to review and modify the setpoints and time delays of the following relays. Anasterisk (*) indicates that the range of pickup setpoints for these functions is different forMicroVersaTrip PM trip units; refer to GEH-5891Afor the correct values.

Breaker Status Display

Breaker Status

Tripped #FEED1

This display shows the status of the selected breaker.The possible modes are open, closed, or tripped.

26

v

Epic MicroVersaTrip® SystemChapters. Operation of Function Keys

3• Undervoltage relay• Voltage-unbalance relay*• Current-unbalance relay*• Power-reversal relay*• Overvoltage relay

The relay set points are expressed in percent andthe time delays in seconds. Each protective-relayfunction can be disabled for each breaker individu-

Enter the new limit on the numeric keypad, thenpress ENTER to store the new value or CLEAR tocancel the change.The following display shows the undervoltage delaytime, in this example set at 15 seconds. It may be setbetween 1 and 15 seconds, with 1-second resolution.

Under Voltage

ally. Delay 15 Sec. #FEED1r

Undervoltage Set Point and DelayCommon applications for the undervoltage function

To change the delay or to disable the undervoltageprotective relay, press PROGRAM, then enter thelocal password and press ENTER.The following dis-play appears:are

• To detect an undervoltage condition in a motorcircuit and trip to prevent damage to themotor.

• To detect undervoltage or loss of voltage on apower source and trip the main breaker topermit switching to an alternate power source.

\ The time delay defines the time interval after thecondition is detected before the breaker is tripped.The comparable GE Type IAV undervoltage relay isa single-phase, inverse-time device in which the timedelay varies as a function of the voltage level.

Under Vlt Dly, Off=0

01d= 15, New=##

Enter the desired delay from the numeric keypad,or 0 to turn undervoltage protection off, followed byENTER. The following display shows the result ofentering 0:

Under Voltage

#FEED1OffUnder Voltage

Limit 87% #FEED1 Voltage-Unbalance Set Point and Time DelayThe most common application for voltage-unbal-ance protection is to protect motors from damagecaused by single-phase conditions by detecting smallvoltage unbalances in the three-phase system. Whilethe motors continue to run on single-phase power,their back EMFs maintain nearly full voltage on theopen phase. Therefore, a sensitive voltage-unbal-ance relay is required to sense the single-phase con-dition.The Epic MicroVersaTrip minimum pickup sensitiv-ity of 5% unbalance is comparable to the sensitivityof the GE Type NBV high-speed voltage-unbalancerelay normally used for this function. The EpicMicroVersaTrip adjustable pickup range is 5% to50% unbalance, while the NBV relay range isapproximately 5% to 10% unbalance. The NBVrelay requires an auxiliary timing relay to avoid nui-

The undervoltage limit may be set between 50 and90% with 1% resolution. In the example above, thelimit is set at 87%. This means that if an undervolt-age that is 13% below system voltage occurs at theselected breaker, and it remains in effect for thespecified time delay, the breaker will trip.To change the set point, press PROGRAM with theabove screen displayed, then enter the password.The following display will appear:

Under Voltage Limit

Old- 87%, New=##

f

27

Epic MicroVersaTrip® SystemChapter 5. Operation of Function Keyssance tripping, while the Epic function has aninherent time-delay adjustment range of 1 to 15 sec-onds.The Epic MicroVersaTrip voltage-unbalance relaymonitors positive phase-sequence voltage and maynot provide protection if the system consists pre-dominantly of motor loads that could maintainnormal voltage on the open phase. The NBV relaymonitors negative phase-sequence voltage and is notaffected by the motor-winding capacitive coupling,which tends to maintain positive-sequence voltagelevels on the open phase.The following display shows the voltage-unbalanceset point, in this example set for 25%, which meansthat if there is a voltage unbalance between phasesof 25% that persists for the specified delay time,then the breaker will trip. The limit may be setbetween 5% and 50% unbalance, with a resolutionofl%.

V Unbal Delay Off=0

01d= 10, New=##

Enter the desired value at the numeric keypad, fol-lowed by ENTER. A value of 0 disables voltage-unbalance protection.Current-Unbalance Set Point and DelayThe most common application for current-unbal-ance protection is to protect motors from damagecaused by single-phase conditions by detecting theunbalanced flow of current in the three phases.(Voltage relays may not sense a single-phase condi-tion because the voltage level and phase balancemay be maintained near normal by the back EMFgenerated by the rotating motors.)The Epic MicroVersaTrip current-unbalance relaymay be set to trip between 5% and 50% unbalance,with a 1- to 15-second delay. The comparable GEType IJG current-unbalance relay has a fixed pickuplevel of 25% unbalance or greater, with a 2.5- or 5.0-second delay, depending on the relay modelselected.This current-unbalance function should not be usedwith a three-phase, four-wire load, since neutralloading could cause unbalanced phase currents as anormal condition.The display below shows the current-unbalance setpoint, in this example 50%. It may be set to anyvalue between 5% and 50%, with 1% resolution.

Voltage Unbalance

Limit 25% #FEED1

To change the set point, press PROGRAM, thenenter the password and press ENTER.The followingdisplay will appear:

Volt Unbalance Limit

Old* 25%, New=##%

Enter the new set point using the numeric keypad,then press ENTER to store the new value.The following display shows the voltage-unbalancedelay, in this case set at 10 seconds. It may be set forany value between 1 and 15 seconds, with 1-secondresolution.

Current Unbalance

Limit 50% #FEED1

Voltage Unbalance To change the set point, press PROGRAM, thenenter the password and press ENTER. The followingdisplay appears:Delay 10 sec #FEED1

To change the delay time, press PROGRAM, thenenter the password and press ENTER.The followingdisplay appears:

Cur Unbalance Limit

01d» 50%, New*##

28

w

Epic MicroVersaTrip® SystemChapter 5. Operation of Function Keyst

Enter the new value on the numeric keypad, thenpress ENTER,

The delay time is shown on the following display:

Reverse Power Limit

Old-100, New=####

Enter the new value on the numeric keypad, thenpress ENTER.The delay time is shown in the following display:

Current Unbalance

Delay 12 sec #FEED1

To change the delay, press PROGRAM, then enterthe local password and press ENTER, The followingdisplay appears:

Reverse Power

Delay 8 sec. #FEED1

C Unbal Delay Off=0 The delay time may be set to any value between 1and 15 seconds, with a resolution of 1 second. Tochange the delay, press PROGRAM, then enter thepassword and press ENTER. The following displayappears:

01d= 12, New=## JEnter the new value on the numeric keypad, thenpress ENTER. A time delay of 0 disables current-unbalance protection. Rev PWR Delay Off=0

Reverse-Power Set Point and DelayA common application of reverse-power protectionis to sense reverse-power flow on systems employingnormally closed main and tie breakers, such as spotnetwork systems. The reverse-power relay trips themain breaker and interrupts the reverse-power flow(magnetizing current) to the transformer when pri-mary power to the transformer is interrupted.The Epic MicroVersaTrip reverse-power relay func-tion has pickup sensitivity equal to the GE type CCPsensitive power-directional relay commonly used forthis function. The CCP relay requires an auxiliarytime-delay relay to avoid nuisance tripping. TheEpic MicroVersaTrip function has a delay range of 1to 15 seconds.The display below shows the reverse-power set point.It may be set anywhere between 1 and 7200 kW, witha resolution of 1 kW.

01d= 8, News##

Enter the new value on the numeric keypad, thenpress ENTER, To disable reverse-power protection,enter 0 for the new value.

'

\

Overvoltage Set Point and DelayThe overvoltage set point is shown on the followingdisplay:

Over Voltage

Limit 110% #FEED1

To change the set point, press PROGRAM, thenenter the password and press ENTER.The followingscreen appeara

Over Voltage Limit

Reverse Power 01d=> 110%, New=###

Limit 100 Kw #FEED1Enter the new value from the numeric keypad, thenpress ENTER. The acceptable range is 110% to150%, with a resolution of 1%.The delay time is shown in the following display:

To change the set point, press PROGRAM, thenenter the password and press ENTER.The followingdisplay appears:

29

Epic MicroVersaTrip® SystemChapter 5. Operation of Function Keys

New events also turn on the SILENCE ALARM lightand close the alarm-relay contacts. Press theSILENCE ALARM key to open the contacts.The keyremains lit until the new events are viewed.To view events, press VIEW EVENT, then NEXTEVENT or LAST EVENT to scroll back and forththrough the events in chronological or reverseorder. To view the most-recent event first, pressVIEW EVENT and then LAST EVENT.Up to 64 events are stored by the FPU in nonvolatilememory. If a new event is received when the log isfull, the oldest event is discarded to make room forthe new event

Over Voltage

Delay 1 sec. #FEED1

To change the delay time, press PROGRAM, thenenter the password and press ENTER.The followingdisplay appears:

Over Vlt Dly, Off=0

Oldss 1, New=> ##

Enter the new value from the numeric keypad, thenpress ENTER.The delay time may be set at any valuefrom 1 to 15 seconds, with a resolution of1second. Protective-Relay Events

A typical event display is as follows:5-5 View EventsPressing VIEW EVENTS displays the number ofevents logged since they were last reviewed:

1 03/20 13:12:59.15

Rev Power Trp #FEED1

Event Displays The first line contains the event number followed bythe date and time at which it occurred. This exam-ple indicates that event #1 occurred on March 20 at1:12:59.15 p.m. The second line contains the eventdescription, in this case a reverse-power trip, and theaddress of the breaker reporting the event. Theother types of protective-relay trips are undervolt-age:

15 events logged

This mode allows the operator to review and deleteevents from the log. These events may be any of thefollowing:• Protective-relaying events. These are trips

caused by a protective-relay function.• Overcurrent-protection events. These are trips

caused by an overcurrent function.• Epic MicroVersaTrip system-unit communica-

tion failures. These occur when the FPU losescommunication with one of the breaker tripunits. These may occur when a breaker isracked out, disconnecting the secondary dis-connect and thus breaking the communicationline. In this case, the operator presses SET-UPSYSTEM and proceeds to the display that allowsdeactivating the breaker.

• Device failures. These occur if an electroniccomponent fails..The FPU stores such failuresin the event log; the codes are described laterin this section.

4 03/22 08:55:14.25

Under Vlt Trp #FEED1

30

Epic MicroVersaTrip® SystemChapter 5. OperationofFunction Keys9

overvoltage: System-Communication. EventsThe following displays illustrate the events that mayoccur if there is a communications problem. Referto the trouble-shooting guide for assistance.

n6 03/22 11:36:19.34

Over Vlt Trp #FEED1

03/20 05:32:47.39voltage unbalance:Homenet Overrun

9 03/25 22:14:04.36

Vlt Unbal Trp flFEEDl 2 03/20 11:52:19.44

and current unbalance: Homenet Comm Error

n7 03/24 03:29:39.57 03/20 17:09:23.05;

Cur Unbal Trp #FEED1 Failure CodeO #FEED1JA Homenet communication error or a failure code0 indicates lack of communication between the spe-cific Epic MicroVersaTrip trip unit and the FPU. If abreaker is racked out without its first being deacti-vated, failure code 0 appears. Insure that thebreaker is racked in before contacting GE.

Overcurrent EventsOvercurrent events are displayed as follows:

) 9 03/23 18:49:14.28

LT Trip 3094A #FEED1

Energy Error EventsIf the FPU has been turned off or a breaker hasbeen racked out for a long time, energy-flow mea-surements may be incorrect. Both the trip unit andthe FPU are involved in updating the energy infor-mation. If communication between the FPU and thetrip unit is interrupted for service reasons, the Epicsystem may lose energy information.The system can detect such a condition and the fol-lowing warning message will appear:

This example indicates that event #9 was a long-timetrip at 3094 amperes. The current at the time of thetrip is saved for both short- and long-time overcur-rent trips. The other types of overcurrent-event dis-plays are ground fault:

14 03/29 23:21:48.39

GF Trp 0.35S #FEEDl

short-dme:6 05/15 13:36:50.85

16 03/30 16:02:43.56

Kwh Not Synch #FEED1ST Trip 3094A #FEED1

This message indicates that some energy informa-don was lost at some time before the time of themessage. We recommend that you reset the energycounter at this point to resynchronize and start over.

and instantaneous:

20 03/30 03:27:42.25r-Inst Trip #FEED1

31

Epic MicroVersaTrip® SystemChapter 5. Operation of Function KeysElectronic Component EventsThe following displays illustrate the events that mayoccur if an electronic component in the FPU fails. Ifany of the following events occur/ call ProductService in Plainville, Connecticut at (800) 8GE-EPIC.

Unit FailCode Description

Trip unit failed to communi-cate0

Protection A/D failure12 Protection RAM failure12 05 /28 17:12 :39.65 3 Protection ROM failure

Protection NVM failure4IOP Failure

5 Metering A/D failureMetering RAM failure613 05/29 01:13 : 57.15

7 Metering ROM failureMetering NVM failure

Bad ROM CRC8

Metering interrupt failureMetering IPC failure

917 06 / 05 03 : 21:35.1910

Bad NVM ChecksumTable 15. Failurecodes for electronic components.

5. Press ENTER if you want to delete it6. Press CLEAR if you want to cancel the opera- ftion.7. The original event display will appear.

To delete all of the events in the log, follow this pro-cedure:1. Press VIEW EVENTS.2. Press CLEAR.3. Enter the password.4. Press ENTER.5. The display will ask if you want to delete all the

events.6. Press ENTER to delete all events.7. Press CLEAR to cancel the operation.

21 06 / 07 09 : 24 :03.29

Memory Parity Error

The Power Break trip unit may generate one of tenfailure codes. The event display is illustrated below.The FPU automatically deactivates the breaker whenan event with any of these failure codes is logged.

1 11/28 17 :25:55.48

FAILURE CODEN #FEED1

N may be any one of the codes listed in Table 15.Refer to the trouble-shooting guide for diagnosis.Clearing Events in the Event LogAny or all of the events in the event log can be 5-6 Set-Up Systemdeleted. To delete a single event, select the event bydisplaying it, then follow this sequence:

1. Press CLEAR.2. Enter the password.3. P^ess ENTER.4. The display will ask if you want to delete the

event.

The SET-UP SYSTEM function allows viewing andchanging of the following system parameters:• Date• Time• FPU version number (can’t be changed)• Host interface parameters

;S2

»Epic MicroVersaTrip® System

Chapters. Operation of Function Keys$switchboard section. The contacts require 120 Vacor 125 Vdc wetting voltage to operate. An optionalcatalog number is available for 48 Vdc wetting volt-age.

• Demand interval• Number of breakers defined

The following breaker parameters may also beviewed and changed:

• Breaker addresses• Potential transformer connection• Potential transformer rating• Rating plug value• Power-flow direction

To view this information, press SET-UP SYSTEM,then scroll through the displays with NEXTDISPLAYand LAST DISPLAY.To change a system parameter, display the value tobe changed, then press PROGRAM and enter thepassword. Enter the new value on the numeric key-pad, then press ENTER to save the new value in thesystem setup. (See the description of the PROGRAMfunction above.)Complete descriptions and instructions for modifi-cation of these parameters are found in theInstallation section.

!

Time of Power UpTo display the last time the FPU was powered up,press SET-UP SYSTEM, enter 19 on the numerickeypad, the press ENTER. This information is usefulfor determining if there were control-power fluctua-tions.This time is automatically updated by the FPUevery time it goes through a power-on reset process.

5-7 Discrete ContactsThe discrete-contact monitoring option may beinstalled in any FPU, allowing the FPU to monitorup to 16 contact pairs. These contacts can beassigned to monitor any desired function, such ascompartment-door switches or protective-devicecontacts. Status information (open or closed) is cohlected by the FPU but can’t be viewed at the FPU; itis only available over the RS-232 link for display bythe host computer.The contact terminals are factory-wired from theFPU to the vertical wire trough in the rear of the

33

V .

Epic MicroVersaTrip® SystemChapter 6. Trouble-Shooting GuideThis guide is provided for trouble-shooting and isolating common problems that may occur during start up.It does not cover every possible condition. Contact Product Service in Plainville, Connecticut at (800) 8GE-EPIC (800-848-8742) if the problem is not resolved by these procedures.

Possible CauseSymptom Corrective Action1. The FPU display is The screen is blanked auto- Press any of the function keys to energize

matically if no key is pressed the display,for approximately 15 minutes.Control power is not available. Check the control-power fuse and power-

supply switch.Check the Epic power fuse or circuitbreaker.

blank.

Epic power is not available.

2. The FPU will not Power is not reaching the trip Check the wiring terminations across thecommunicate with any units.circuit breaker trip Communication voltage is not Measure the voltage at the FPU (Cl-6 to

Cl-5). Contact Product Service for assis-tance if the voltage is below 15Vdc.

shipping splits.unit. present

S. The FPU will not The breaker may be in the Ensure that the breaker is in the test posi-tion.

The trip unit has no rating Check that the rating plug is installed inthe trip unit

The same address was See Condition 4.assigned to more than onebreaker,

communicate with a wrong position,specific breaker.

plug.

4. Communication is Two or more breakers have Delete all the breakers from the system,intermittent, with been assigned the same Rack out all the breakers and add themfluctuating rating-plug address. again one at a time as described in the

system set-up section.values.

5. Voltage readings are The PT primary rating was Verify the PT primary rating definition.defined incorrectly.The PT primary correction Verify the PT primary connection defini-was defined incorrectly.A PT primary fuse is open.

incorrect

tion.Check the PT primary fuses.

6. The phase currents For current magnitudes below None,.read zero, even though 5% of the rating-plug value,the breaker'is drawing the FPU displays 0 amps,current The sensor rating was not Verify the sensor rating definition as

described in section 4-5.defined.

34

s> • •'V

Epic MicroVersaTrip® SystemChapter 6. Trouble-Shooting Guide

Possible Cause Corrective ActionSymptom7. Power readings are The PT primary rating was Verily the PT primary rating definition as

incorrect defined incorrectly. described in section 4-5.The PT primary connection Verify the PT primary connection defini-was defined incorrectly.A PT primary fuse is open.The sensor rating of the TSM1 Verify the TSM1 sensor rating definition asmetering module (if present) described in section 4-5.was not defined.

tion as described in section 4-5.Check the PT primary fuses.

Contact Product Service to replace thebattery.8. The clock loses time The clock battery is dead,

when control power isshut off.

9, A breaker is deacti- The trip unit was not reacti- Reactivate the breakervated because of vated after being racked out

for maintenance.Two or more breakers were See Condition 4.assigned the same address.The rating plug was removed. Check the rating plug.The shipping split was not Check the wiring terminations at the

shipping split

Failure Code 0.

Iproperly connected.

Check the PT fuses.There are loose wires in the Check the voltage-sensing section (PTs) for

loose wires.10. A breaker is deacti- The PT fuses were removed,

vated because ofFailure Code 9. PTs.

The secondary disconnect has Check the secondary disconnect of the triploose pins.Condition must be reset

unit for loose pins.Turn the control power off for 15 seconds.If the failure recurs, contact ProductService.

i11, A breaker is deacti- Condition is not serviceable by Contact Product Service,

vated because of user.Failure Code 1, 2, 3, 4,5, 6, 7, 8, or 10.

12. The host PC will not The host was set up incor- Check the FPU host setup for incorrectbaud rate, data bits, stop bits, and paritycommunicate with the rectly.

FPU. bits.The host and FPU are con- Check the cable; a null modem is requirednected without a null modem, for direct connection.

35i

n>Epic MicroVersaTrip® SystemChapter 6. Trouble-Shooting Guide 4Symptom Possible Cause Corrective Action13. An Epic MVT trip unit The trip unit is an older- Remove the rating plug to address the unit

as described in section 4-5.cannot be addressed generation unitby turning a switch.

14. The pickup LED does The trip unit is an older- The rating plug must be removed to com-not flash during generation unitaddressing. plete addressing, as described in section

4-5.15. Overvoltage set points The trip unit is an older- Overvoltage relaying is not available; con-

do not appear on the generation unitFPU. tact Product Service to order a trip unit

upgrade.

16. Power-flow direction The trip unit is an older- Power-flow direction is not available; con-cannot be set at the generation unit.FPU. tact Product Service to order a trip unit

upgrade.17. The value on the rat- The current rating was not Enter the current rating at the trip unit to

ing plug label does not entered at the trip unitmatch the value indi-cated at the FPU (PMonly).

match the rating plug value.i

*i

36