Digital transformer protection systems

Transformer Protection Systems

Digital TransformerProtection SystemsDigital TransformerProtection Systems


Software derived phase shift, ratio correction and zero-sequence filtering to meet any winding type, CT connection and grounding

Programmable I/O, Logic, and elements to meet different applications

Full complement of backup protection functions

Metering, Through Fault Capability, Sequence of Events Recording

Remote/Local Communication Capability

Digital Transformer Protection Systems


IPScom® Communications PC Software package for setpoint interrogation/modification, metering, monitoring, and downloading oscillograph records

IPSplot® Oscillographic Analysis Software package graphically displays, facilities analysis, and prints captured waveforms

Commissioning tools to speed factory acceptance testing and field start-up

Forensic engineering capabilities for rapid fault and event diagnostics

Interface and Analysis Software


M-3310 -- Introduced in 1998Two Winding applications

M-3311 -- Introduced in 2002Adaptable to 2, 3 Winding Applications

M-3311A --- Introduced in 2007Adaptable to 2, 3 or 4 Winding ApplicationsThrough fault recorderTrip circuit monitoringSequence of events recorderEnhanced oscillography

Digital Transformer Protection Relays


Digital Transformer Differential RelaysM-3310 / M-3311 / M-3311A

0/2/4*32/3/4 M3311A

0/1*22/3 M3311

0/3*12M3310Voltages # 87GD# WindingsModel

Expandable I/O adds: 12 Inputs and 8 Outputs *Optional I/O (M-3311A)

6 Self-wetted Inputs / 8 Programmable OutputsStandard I/O:


M-3310 and M-3311

More Than Your Average Differential Relays


M-3311A Two, Three or Four winding protection


M-3311A Rear panel


M-3311A-4W-2V234M-3311A-4W-0V034M-3311A-3W-4V423M-3311A-3W-2V223M-3311A-3W-0V023M-3311A-2W-4V412M-3311A-2W-2V212M-3311A-2W-0V012

ModelVoltages Gnd CT'sWindingsBeckwithApplication

M-3311A Application Configurations


Unique features of Beckwith Transformer Protection Relays

Adaptive overexcitation restraint based on 5th harmonic

Multiple ground directional differential elements

Graphical display of uncompensated and compensatedphasors for each winding to help commissioningThrough fault monitoring to schedule early maintenance and prevent transformer failures

User friendly setting of transformer/CT connection configurations

Voltage inputs with overexcitation protection

Event recording with 512 events in addition to Target log


Set the configuration

Select elements to set

Set elements

Define tripping and blocking assignments

Review/print summary

How do you set a relay?


M-3311 - 3 Winding


Challenge: To be able to handle ANY combination of transformer winding arrangements and CT connection arrangementsHow it is accomplished: Use a menu that contains EVERYpossible combination

- Set W1’s transformer configuration and CT configuration- Set W2’s transformer configuration and CT configuration- Set W3 transformer configuration and CT configuration

Relay selects the proper currents to use, directly or through vector subtractionRelay applies factors if required √ 3Relay applies zero sequence filter if required

- Standard or Custom selectionStandard handles most arrangements, including all ANSI standard typeCustom allows any possible connections to beaccommodated

M-3311 Application Adaptation


IPScom M-3311 Example: Relay Configuration

Standard


W1 = Delta AC at zero degrees (reference), y CTsW2 = Wye at –150 degrees, y CTsW3 = Wye at –330 degrees, y CTs“IEC,” Dy5y11,

ACy

A

BC

A

B

C

Yy

A

B

C

Yy

W1

W2 W3



M-3311 Application AdaptationDy5 Dy11


Pick off the menu and you are done!

Ability to create custom adaptations also



IPScom Example: Relay Configuration

Custom


M-3311 Custom Connections

Zero sequence currents could appear in this input to relay butin no other, causing possible false trip during an external fault.

i

1

9

I

i

IEC ReferenceD y1y 9

Beckwith reference: Dab/wye/wye

Winding #1 #2 #3

Winding Type Dab y1 y9

Dab - CT

a

cb

Line Current ∠º 330º 0º 240º

CCW rotation 330º 0º 240º

Relay CT Setting 0 23 0

Magnitude Comp. no yes noCT Degree 0º 330º 0º

Combined Comp. 1∠0º 1 √3∠330º 1∠0º

CT Compensation

Winding Compensation

Relay Phase Setting 11 0 8

CT Type Y Dab Y

Zero Sequence EliminationZero sequence filter enabled x

AB

C bc

a

c

b

a


M3311 Custom Table Selection


IPScom Example: Relay Configuration

Custom


Ground Fault


M-3311A - 4 Winding

51W1

50W1

46W3

50BFW3

50W3

51W3

59G

3-CT

3-CT

M-3311A

This function is available as astandard protective function.

This function is available in theOptional Single-Phase VoltageProtection Package.

M-3311A TypicalConnection DiagramFour Winding Model

B

1-CT

R

87GDW2

50NBFW2

51NW2

87H

Winding 1(W1)

Winding 2(W2) Winding 3

(W3)50GW2

51GW2

C

87T

1

46W2

50BFW2

50W2

51W2

1

50GW3

51GW3

87GDW3

50NBFW3

51NW3

R

1

1

1

3-CT

1-CT

50NBFW1

51NW1

50BFW1

49W1

49W2

49W3

50NW2

50NW1

50NW3

Targets(Optional)

Integral HMI(Optional)

Metering

Sequence OfEvents

Waveform Capture

IRIG-B

Front RS232Communication

Multiple SettingGroups

Programmable I/O

Self Diagnostics

Dual Power Supply(Optional)

*

*

*

Rear RS-232/485Communication

ProgrammableLogic

A

RJ45 Ethernet(Optional)

52 52

51W4

50W4

1

50NBFW4

51NW4

50BFW4

49W4

50NW4

*

3-CT

Winding 4(W4)

VT 2 1-VT 2

81O/U

2724

VX V0


M-3311A - 4 Winding

51Sum

50Sum

46W3

50BFW3

50W3

51W3

59G

3-CT

3-CT

M-3311A

This function is available as astandard protective function.

This function is available in theOptional Single-Phase VoltageProtection Package.

M-3311A TypicalConnection DiagramFour Winding Model

B

1-CT

R

87GDW2

50NBFW2

51NW2

87H

Winding 1(W1)

Winding 2(W2) Winding 3

(W3)50GW2

51GW2

C

87T

1

46W2

50BFW2

50W2

51W2

1

50GW3

51GW3

87GDW3

50NBFW3

51NW3

R

1

1

1

3-CT

1-CT

50NBF

Sum

51NSum

50BFSum

49Sum

49W2

49W3

50NW2

50NW1

50NW3

Targets(Optional)

Integral HMI(Optional)

Metering

Sequence OfEvents

Waveform Capture

IRIG-B

Front RS232Communication

Multiple SettingGroups

Programmable I/O

Self Diagnostics

Dual Power Supply(Optional)

*

*

*

Rear RS-232/485Communication

ProgrammableLogic

A

RJ45 Ethernet(Optional)

52 523-CT

Winding 4(W4)

VT 2 1-VT 2

81O/U

2724Σ

* Two sets of summed winding cuurentscan be enabled at a time.

VXVo


M-3311A IPScom Example: Relay Configuration

Current Summing

4 Windings


M-3311A Current Summing Application


Setting Current Summing Selection

Select W2 & W3


51 Function Current Summing Selection


87GD Function Current Summing Selection


IPScom Example: Element Selection


IPScom Example: Element Setting

Blocking InputsOutputs


Trip Characteristic – 87T

0.5

1.0

1.5

2.0

0.5 1.0 1.5 2.0

87T Pick Up

87T Pick Upwith 5th Harmonic Restraint

Slope 1

Slope 2

Slope 2Breakpoint

TRIP

RESTRAIN


M-3311 Programmable Logic


M-3311 Programmable Logic


IPScom Example: I/O Assignment


IPScom Example: Settings Summary


Available in primary and secondary values

Metering


Metering II


Function Status


Sequence of Events Recorder (total 512 Events are stored)


Through Fault Recorder

• In addition to the Event Recorder, the M3311A also has a separate Through Fault Recorder

• Each through fault record contains the serial number of the fault, duration of the event, maximum RMS fault current magnitude for each phase, I2 t and time stamp.

• It will also store the total number of through faults


Through Fault Recorder


Breaker Monitor


A very useful commissioning tool for viewing selected vectorsTwo Types- Differential

Displays uncompensated currents- You can see the phase shift and relative

magnitudesDisplays compensated currents

- If they are equal in magnitude, and W2 and W3 are 180 degrees out from W1, the field wiring and relay settings are in agreement

- All Currents and VoltagesDisplays all values

Vector Displays


Vector Display 87: M-3311W1, Phase A at 0 degrees

W2, Phase A at 0 degrees (180)W3, Phase A at 180 Degrees

W1, Phase A at 0 degreesW2, Phase A at 0 degrees (180)

W3, Phase A at 180 degrees


Waveform Capture


Front Panel- RS-232 for PC Interface

Rear Panel- RS-232 for Control System, SCADA or Modem

Interface- RS-485 for Control System and SCADA Interface- Optional Ethernet (M-3311A only)

Protocols- M-3310: MODBUS- M-3311: MODBUS and DNP- M-3311A: MODBUS, DNP, MODBUS over TCP/IP

DNP over TCP/IP and IEC 61850 is under development

Communications Flexibility


RS-232 Communication


RS-485 Communication


Fiber Optic Communication

©2008 Beckwith Electric Co., Inc.

Engineering

Digital transformer protection systems