GE IMCC

7/31/2019 GE IMCC

1/8

GE Power Management205

MM3IntelligentMCC

Controller

MM3IntelligentMCC

Controller

The Motor Manager 3 (MM3)combines control functions andcomprehensive motor protection inone package. This compact deviceprovides sophisticated control andprotective relaying at significant costsavings over the discrete devicesnormally found in a low voltagemotor control center (MCC).

One MM3 is required for everystarter in the MCC. The contactorscan be energized and de-energizedusing the MM3s direct wired inputs,or via the serial port. A total of 6fixed and 10 programmable switchinputs are available. A wide range ofstarter types may be controlled bythe MM3 using two contactoroutputs and two auxiliary outputs.One analog input can beprogrammed by the user as well asone analog out. A programmableundervoltage auto restart function isavailable.

Motor protection features for themost common causes of failure areprovided to prevent costly shutdowns and rewinds. These includeoverload, phase unbalance, lockedrotor (stall), ground fault, undercur-rent and underpower. A thermistorinput can also be provided to protecta hot winding. The relay checks thecontactor status at start and stopcommands to indicate contactor fail-ure. Alarms are provided to warn of

additional abnormal conditions.

The MM3 has two mounting configu-rations: chassis mount no display, andpanel mount local display. Bothmodels have a 2 wire RS485 ModBus

RTU protocol communication portoperating at up to 57,600 bps. Thepanel mount model has a stop keyand 8 status LEDs, a 2 by 20 linedisplay, 2 additional command modeLEDs, and a keypad, which allows fulllocal access without a computer.

DESCRIPTION

Integrated process and electrical controlwith protection for low voltage motors.

Applicationss Low voltage motor control centerss Integrated process & electrical control

Protections Overloads

Phase unbalances Contactor failures Locked/stalled rotors Ground faults Hot winding thermistors Undercurrent/underpower

Controls Undervoltage auto restarts Outputs: 2 contactor, 2 programmables Inputs: 6 fixed, 10 programmables 1 analog inputs 1 analog output 4-20 mA

Monitoring and Meterings Display phase current, ground current,

thermal capacity, analog input, power,energy, etc.

s Trip record and pre-trip valuess Maintenance informations Self-test

User Interfacess RS485 ModBus Port, 1200 - 57,600 bpss Display model for local interfaces Up to 10 status LEDs

Featuress Reduces MCC and field wirings Replaces timers, relays, protective

devices, meters, panel indicatorss Integrated primary CTs up to 250 FLCs Local faceplates Standard removable rear terminalss Remote Touchscreen graphical interface

(connects up to 32 units)

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MM3 Intelligent MCC ControllerMM3 Intelligent MCC Controller

Motor Protection www.GEindustrial.com/pm

PROTECTION AND CONTROL

The MM3 is available with differentprotection and control featuresdepending on the model ordered asoutlined in the Model Table (page 208).

Overload (49/51)An overload trip is caused when the

thermal capacity value equals 100%.Thermal capacity used is calculatedfrom accumulated I2t value and chosenoverload curves. True RMS currentsensing ensures correct response tothe heating effect of harmonics. One of12 different I2t time-overcurrent over-load curves may be selected from 8standard curves and 4 NEMA compati-ble curves.

Of the 12 overload curves available 4 are NEMAcompatible time/current overload curves.

Phase Unbalance (46)The MM3 monitors the percentageunbalance in the motor phase currents.If a phase current unbalance of greater

than 15% exists for more than 5seconds an alarm is generated. If aphase current unbalance of greaterthan 30% exists for more than 5seconds a trip occurs.

Locked/Stalled Rotor (48)Mechanical equipment such as pumpsor fans can be quickly damaged if itgets jammed resulting in a locked rotorstall. The MM3 will trip when therunning current exceeds the stalledrotor trip level after the programmedtime delay. If stall protection is not

required this feature may be set toOFF. This feature is disabled duringthe inrush of motor starting.

Ground fault (50G/51G)The ground fault level is measured as apercentage of FLC. Ground overcurrentcan be detected either from the resid-ual connection of the phase CTs orfrom the zero sequence CT. A delaytime is set to prevent nuisance alarms

from momentary surges. Both aground fault alarm and trip are provid-ed. The alarm can be set below the triplevel to get an early warning of insula-tion breakdown.

Overtemperature (49)An input from motor winding thermis-tors is available. The MM3 can acceptboth positive temperature coefficient(PTC) and negative temperature coeffi-cient (NTC) sensors. A thermistor levelcan be selected for both alarm and trip.

Cooling TimeAfter an overload trip the thermalcapacity value will decrease exponen-tially to model the coolingcharacteristic of the motor. An over-load trip can normally be reset whenthe thermal capacity value decreases to15%. A stopped motor cooling time canbe set to determine how long it takesfor a stopped motor to reach steadystate ambient temperature from itsmaximum allowable temperature.

Undercurrent/Underpower (37)

Both undercurrent and underpoweralarms and trips are provided with timedelays. Protection against failed

shearpin, loss of pump flow, etc.,which may result in only a smallchange in current is provided by theunder power alarm.

Contactor FailureThe MM3 monitors the contactor while

performing start and stop commands.If the contactor does not change status(open to closed or closed to open) anopen control circuit or weldedcontactor alarm is triggered.

Additional AlarmsThe MM3 has programmable alarms towarn of a number of abnormal condi-tions. These include: acceleration timeexceeded, abnormal inverter starter,incomplete start, motor greasing,contactor inspection, motor stop time,analog input, and process interlock

switch open.

StartersThe MM3 can control a variety ofstarter types using the contactoroutputs. Contactor A is used for fullvoltage non-reversing starters.Contactor A and B are used for revers-ing, two speed, autotransformer,inverter, wye-delta open transition, slipring, and part winding starters.Contactors A, B, and one auxiliaryoutput are used for the reduced volt-age wye-delta closed transition starter.

100000

10000

1000

100

10

10.1 0.5 1 2 3 4 5 6 7 89 10 20 50 100

807903D4.cdr

TIMEIN

SECONDS

MULTIPLE OF PICKUP CURRENT (PER UNIT)

CURVE #

CLASS 30

CLASS 20

CLASS 15

CLASS 10

FUNCTIONAL BLOCK DIAGRAM

52

480 VOLT BUS

FUSE

CONTACTOR

PHASE PT

PHASE CT

GROUND CT

THERMISTOR

MOTOR

LOAD

WINDING

THERMISTOR49

51G

51 49 37 46

59 27

4-20mA

INPUT

CONTROL

INPUTS

AUX 2

RELAY

RS485 REMOTECOMMUNICATION

1200-57K6 BAUD

PROCESSPLC OR

TRANSDUCER

809751A2.dwg

AUX 1RELAY

CONTACTOR B(REVERSE/DELTA)

CONTACTOR A(FORWARD/WYE)

MOTOR

MANAGER 3

49/51 Overload

46 Phase unbalance

(single phase)

Welded/open contactor

50G/51G Ground fault48 Locked rotor/stalled rotor

37 Undercurrent/underpower

27 Undervoltage

59 Overvoltage

49 Hot winding (thermistor) option 3

DEVICE PROTECTION

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www.GEindustrial.com/pm Motor Protection

at which a number of routine mainte-nance tasks should be performed.When these times are exceeded analarm is generated. These include:

s Motor greasing interval: number ofhours after which motor bearings

must be lubricated

s Contactor inspection: number ofstarts after which contactor contactsmust be inspected for wear

s Maximum motor stopped time: Themaximum number of hours that themotor can be left not running

NetworkingGateway solutions exist to connect theMM3 to installed protocols in a givensystem. The X-Link is a gateway prod-uct from SST (www.sstech.on.ca). Thisproduct makes it possible to transfer

data between two communicationsnetworks. Networks such as ModBus,ModBus Plus, ProfiBus, DeviceNet,Data Highway Plus, GE Fanuc,ControlNet and DNP are supported.

Undervoltage Auto RestartIt is possible to automatically restartthe motor after a momentary powerloss if this feature is enabled. When thecontrol voltage drops below thedropout voltage the contactors are de-

energized. The MM3 can initiate timersto restart selected drives upon thereturn of supply voltage. If control volt-age is restored within the programmedrestart time it will be restarted immedi-ately. If the control voltage takes longerto be restored the MM3 can beprogrammed to attempt to restart themotor after a programmed time delay.

OutputsThe MM3 has one or two contactors (Aand B). There are also two auxiliaryprogrammable output relays available

on the MM3. These two outputs can beassigned to any one of 31 functions.

Switched InputsThe MM3 has up to 6 fixed controlinputs. These are used for start A andB, stop, local isolator, and contactor Aand B status. The MM3 also has up to10 programmable switch inputs. Eachinput can have one of 33 interlock func-tions assigned to it. Once a function isassigned to one interlock input thatfunction cannot be assigned to anyother interlock input.

Analog InputThe analog input can be scaled to userdefined values. High and low alarmand trip setpoints are recorded withtime delays.

MeteringThe MM3 meters and displays:

s RMS current of each phase

s Ground fault leakage current

s Motor load as a % of full load current

s Thermal capacity used (%) accordingto I2t history and chosen overloadcurve; hot/cold ratio is used to modelheating when running below fullmotor current

s % unbalance

s Power (kW)

s Energy (kWh)

s Voltage

s Analog input

Trip RecordWhen the MM3 issues a trip command

a trip record is generated. This includesthe cause of the trip and pre-trip actualvalues.

Statistics and MaintenanceThe MM3 records statistical data aboutrelay and motor operation. The MM3also allows the user to set the interval

MONITORING AND METERING

MCC WIRING

CONVERTIONAL MCC MCC WITH MOTOR MANAGER 3SUPERVISORY CONTROL SYSTEM FOR ONE STARTERSUPERVISORY CONTROL SYSTEM FOR ONE STARTER

TWO WIREREMOTE CONTROL

CONTROL CABLE

LOCAL MCC

RS485 TWISTED PAIR

MM III240/120 V AC

FIELDSTOP

CONTRACTOR

809755A2.AI

PANEL DEVICES

RUNNINGINDICATOR

STOPPEDINDICATIOR

TRIPPEDINDICATIOR

HOURSRUNCOUNTER

NUMBERSOFSTARTS

STARTPUSHBUTTON

STOPPU SHBUTTON

STOPRELAY

STOPRELAY

O/LRELAY

STARTRELAY

STARTRELAY

CONTACTORC3

CONTACTORC2

CONTACTORTRIP FIELDSTOP

GROUNDFAULT

STALLRELAY

THERMISTOR U/CRELAY

ACCELTIME

TRIPRELAY

L

N

TRIPPEDRUNNINGSTOPPED24V DCOUTPUTS

10 WIRECONTROL CABLE

240/120V AC

L

N

Cost Effective MCC Wiring with MM3.

RS232 CABLES FROMCOM PORT OF THESERIAL CARDAND X-LINK TO F485

NULL

MODEM

CABLE

SUPPLIE

DWITH

X-LIN

K

FORX

-LINK

CONF

IGURA

TION

CONN

ECTEDF

ROMX-L

INK

CONF

IGPO

RTTO

PCCOMPO

RT

TWISTED PAIRSHIELDEDTWISTED PAIR

SLAVE 1 SLAVE 1 SLAVE 1

SLAVE 2 SLAVE 2 SLAVE 2

SLAVE 3

SHIELDEDTWISTED PAIR

DAISY-CHAIN 1DAISY-CHAIN 2DAISY-CHAIN 3

RS232

COMPUTER

F I BE R O P TI C R S4 8 5 P O WE R P O WE R

9VAC/9VDCTx Rx + -C OM GND + -

9VAC/9VDCCOMPORT

F485 OR SCI BOX

RS232

COMPUTER


9VAC/9VDCTx Rx + -C OMGND + -

9VAC/9VDCCOMPORT

F485 OR SCI BOX

RS232

COMPUTER


9VAC/9VDCTx Rx + -C OM GND + -

9VAC/9VDCCOMPORT

F485 OR SCI BOX

STOP

SETPOINT

ACTUAL

RESET

STORE

STARTA

STARTBMANUAL

AUTOCONTACTORA

CONTACTORB

AUX 1

AUX 2

RUNNING

STOPPED

TRIPPED

ALARM

FAULT

MESSAGE

VALUE

PC EQUIPPED WITH:SST 5136-PFB PROFIBUS CARDMICROSOFT EXCELSST X-LINK CONFIGURATION SOFTWARESST DP MASTER DDE SERVER SOFTWARESST PROFIBUS CONFIGURATION SOFTWARE

SST X-LINK EQUIPPED WITH:SST 5136-PBMS PROFIBUS CARDOPTIONAL RS232 SERIAL CARDKERNEL DRIVERMODBUS DRIVER (DRIVER 1)PROFIBUS-PBMSLV DRIVER (DRIVER 2)

PROFIBUS-DPNETWORK

MODBUSNETWORK

S T A T US C O M M UN IC A TE R E L A Y S

POWER QUALITY METERPQM

SIMULATION

ALARM

SELF TEST

PROGRAM

TX2

TX1

RX2

RX1

AUX2

ALARM

AUX3

AUX1

SR469

S R4 6 9 I N SE RV I CE S T OP P ED R 1 T R IP

S E TP O IN T AC CE SS S T AR T IN G R 2 A U XI L IA RY

C O MP U TE R RS 23 2 R UN N IN G R 3 A U X IL I AR Y

R4 ALARM

R5 BLOCKSTART

R6 SERVICE

MESSAGE

HOTRTD

LOSSOF LOAD

MOTORMANAGEMENTRELAY

PROGRAMPORT SETPOINT 7 8 9

4 5 6

1 2 3

. 0 HELP

MESSAGE

VALUE

ACTUAL

ESCAPE

ENTER

TM

RESET

NEXT

RESETPOSSIBLE

COMPUTERRS485

AUXILIARYRS4 85

LOCKOUT

SR4 6 9 ST AT U S M O T O RSTA T U S O U T P U T REL A YS

OVERLOAD PICKUP

UNBALANCEPICKUP

GROUND PICKUP

STOP

RUNNING RELAYA

STOPPED RELAYB

T RI PP ED A U X RE LA Y 1

A LA RM A U X R EL AY 2

VALUE

MESSAGE

A U T O M A N UA L

STORE

RESET

ACTUAL

SETPOINT

START

A

START

B

STOP

RUNNING RELAYA

STOPPED RELAYB

T RI PP ED A U X RE LA Y 1


VALUE

MESSAGE

A U T O M A N UA L

STORE

RESET

ACTUAL

SETPOINT

START

A

START

B

STOP

R UN NI N G R EL AY A

STOPPED RELAYB

TRIPPED AUX RELAY1


VALUE

MESSAGE

A U T O M A N UA L

STORE

RESET

ACTUAL

SETPOINT

START

A

START

B

STOP

R UN N IN G R EL AY A

STOPPED RELAYB

TRIPPED AUX RELAY1

A LA RM A UX R EL AY 2

VALUE

MESSAGE

A U T O M A N UA L

STORE

RESET

ACTUAL

SETPOINT

START

A

START

B

809822a1.ai

X-Link makes it possible to transfer data between two communications networks.

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CommunicationThe MM3 uses a ModBus RTU RS485connection for communication. Up to32 MM3s can be daisy chained togeth-er on a single communication channel.The MM3 supports operation at 1200 to57600 bps. A RS232/485 converter

module may be used to connect apersonal computer to the MM3.

SoftwareThe MM3 is provided with a freecommunications program calledMM3PC. It runs on a personal comput-er under Windows. It allows access toall the features of the MM3 with easyto use pull down menus. Using thisprogram it is possible to:

s Program or modify setpointss Load or save setpoints from or to a disks Read actual values from the MM3

s Monitor statuss Read pre-trip data and trip records Display dynamic trending of actual

valuess Get help on any topics Print the instruction manual from disks Simulate and test features

Windows based software is supplied with the MM3.

Mounting ConfigurationsThe MM3 can be ordered in twomounting configurations; the chassismount and the panel mount with localdisplay.

The chassis mount model is the black box

version of the MM3. It is mounted inside the motorcontrol center (MCC).

The chassis mount version has theadded flexibility of using the displayport as a second communications port.The advantage is that slower meteringfunctions can be assigned to onecommunications port while the otherport could be used for high speedcommand operations such asStart/Stop or quick status updates suchas tripped, running, etc. Using thesecond port provides a means forredundant communication channelsguaranteeing control and status infor-mation even if one channel isinterrupted.

Alternatively up to 32 MM3s could be daisychained and connected to a Touch-screenGraphical Interface (TGI) module for remotestatus/command operations.

The panel mount with display model is the Top ofthe Line MM3.

The panel mount with local displaymodel is mounted on the front panel ofthe MCC with its 2 by 20 alphanumericdisplay, full keypad, and 10 status LEDsexposed to the operator for completelocal viewing and setpoint program-

ming. The setpoints can also be loadedinto the relay through the RS485communications port.

MODELSUSER INTERFACES

Model Table: The MM3 is available in chassis mount or panel mount models.

Protection 3 phase overload protection (49/51) 3 phase overload protection (49/51)Phase unbalance (46) Phase unbalance (46)Welded/open contactor Welded/open contactorGround fault trips (50G/51G) Ground fault trips (50G/51G)Stalled rotor protection (48) Stalled rotor protection (48)Display kw and kWh Display kw and kWhUndercurrent/underpower (37) Undercurrent/underpower (37)Overvoltage (59) Overvoltage (59)Undervoltage (27) Undervoltage (27)

Inputs 4 control 6 control2 programmable 10 programmable

Thermistor inputAnalog in inputAnalog output

Relays Contactor A Contactor A

Contactor BAux 1 Aux 1Aux 2 or ESD relay Aux 2 or ESD relay

OPTION 1 (Standard) OPTION 2

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FEATURES

Front View

STATUS INDICATORS:

RUNNING: Contactor is energizedand motor is running.

STOPPED: Contactor is not ener-gized and motor is not running.

TRIPPED: Contactor is not ener-gized. Motor is not running. TheMM3 has tripped the motor due toa fault. Normally a cause of tripmessage will be displayed.

ALARM: One or more alarm condi-tions are present. Normally acause of alarm message will bedisplayed.

GROUND CT INPUT50:0.025 ground faultinput.

Rear View

DISPLAY:

2 line, 40 character illuminated displaycommunicates all messages in simpleEnglish for easy interpretation by usersunfamiliar with unit.

SUPPLY VOLTAGErequired to power the MM3

VOLTAGE INPUTPhase A voltage input forvoltage and power monitoring.

SWITCH INPUTSOpto-isolated 120/240 VAC live inputs for various interlock functions. Theinterlock inputs are fully programmable and can be assigned to suchfunctions as setpoint access, plant interlock, test, and various others.

COMMUNICATIONSRS485 2 wire serialcommunication portoperates at 1200 - 57,600bps for remotecommands, monitoringand setpoint store.ModBus RTU protocol.

Groundsafety andsurge

THERMISTORNTC or PTC thermistorinput for hot windingdetection.

ANALOG INPUT/OUTPUT4 - 20mA input for processcontrol monitoring /alarming / tripping.

4 RELAYSsContactor A: direct on

line / forward / wyesContactor B: reverse / deltasUser programmable relay

(AUX 1)sUser programmable relay

(AUX 2)

PROGRAM KEYS:

ACTUAL VALUES: Press to enteractual values mode to display actu-al motor values such as current,ground leakage, thermal capacity.

SETPOINTS: Press to enter setpoint

mode to alter or examine setpoints.STORE: Save a newly enteredsetpoint.

RESET: Reset the MM3 after a trip.

MESSAGE: Move to the desiredsetpoint or actual value message.

VALUE: Increment or decrementcurrently displayed setpoint value.

CONTROL KEYS:

AUTO: Selectsoperation of start via communi-cation port.

MANUAL: Selects manual opera-tion of motor using start key.

START A: Energize contactor A.

START B: Energize contactor B.STOP: De-energize contactors.

RELAY INDICATORS:

RELAY A: Contactor A energized.

RELAY B: Contactor B energized.

AUX 1: User programmable relay 1 energized.

AUX 2: User programmable relay 2 energized.

CONTROL POWER120/240 VAC supply voltageselector switch and fuseaccess door

Ground safety

RESIDUAL GROUND INPUT

PHASE CT INPUTS3 isolated phase CT inputs

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TYPICAL WIRING

809772A4.dwg

GE Power Management

PHONE JACK

TO REMOTE DISPLAY48

21

22

24

23

30

29

28

18

17

16

15

14

13

12

11

1

2

3

4

56

7

8

9

10 2520

26

27

31

32

33

43

42

41

40

39

38

37

36

35

34

44

45

46

47

EARTH SAFETY

EARTH SAFETY

EARTH SURGE

LIVE

NEUTRALCONTROLPOWE

R

ANALOG IN SHIELD

ANALOG -

ANALOG +

THERMISTOR -

THERMISTOR +

ANALOGIN

CONTACTOR BSTATUS NO

CONTACTOR A

STATUS NO

ISOLATORSTATUS NO

START B

START AFIXEDSWITCHINPU

TS

STOP

INTERLOCKINPUT 1

INTERLOCKINPUT 2

INTERLOCKINPUT 3

INTERLOCKINPUT 4

INTERLOCKINPUT 5

INTERLOCKINPUT 6

INTERLOCKINPUT 7

INTERLOCKINPUT 8

INTERLOCKINPUT 9

INTERLOCKINPUT 10

PROGRA

MMABLEINPUTS

INTERNAL CONNECTOR

MOTOR MANAGER 3OPTION 2

SERIAL 485 A+

SERIAL 485 B-

485 SHIELD

ANALOG +

ANALOG -

ANALOG OUTSHIELDA

NALOG

OUT

RS485

PROGRAMMABLE

RELAY1

P

ROGRAMMABLE

RELAY2

PROG.

RELAY2

EXT.COIL +24 VDC

+24 COM

COM

COM

N/C

N/C

N/O

N/O

MOTORCT PHASE C

CT PHASE B

CT GROUND

CT MODULE

CT PHASE ACONTACTOR

L1

L2

L3

A

A

A

F3

F4

F5

F2F1

A

B

C

480 VOLTS

C

AB

480 VOLTS

110/230 VAC

A

STATORTHERMISTOR

4-20mAANALOG IN

MCC GROUND BUS

NOTES:1. RELAY CONTACT STATE SHOWN WITH CONTROL POWER NOT APPLIED.2. TERMINALS MARKED WITH "*" MUST BE CONNECTED BEFORE MOTOR CAN BE STARTED.

3. DO NOT GROUND TERMINAL 19 WHEN USING A EXTERNAL GROUND CT.

CONTACTOR A

4-20 mAANALOG OUT

RS485

19

= OPTION 2

*

*

N/O

N/O

CONTACTOR

B

CONTACTOR

A

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PROTECTION

OVERLOAD CURVESTrip Time: 200 ms up to 10 secAccuracy: 2% of trip time over 10 secDetection Level: 1% of primary CT amps

GROUND FAULT TRIP TIMEAccuracy: - 0 ms, + 50 ms, 0.0 = less than 50 ms

SINGLE PHASE (PHASE UNBALANCE)Range: Greater than 30% U/B

Accuracy: 2 percentage pointsTrip Delay: 5 sec, 1 secCalculation Method: If IAV IFLC : UB = |

IM - IAV | x 100IAV

If IAV < IFLC : UB =| IM - IAV | x 100

IFLC

Where: IAV = average phase currentsIM = current in a phase with maximum

deviation from IAVIFLC = motor full load current setting

UNDERCURRENTRange: 10-100% of motor FLC, or OFFDelay Range: 1 to 60 secAccuracy: 1 sec

UNDERVOLTAGE SUPPLY VOLTAGEUndervoltage: 65 % of nominal (120 VAC or 240 VAC)

immediate restart for maximum diptime of 0.1-0.5 s ec or OFFdelayed restart for maximum dip time of0.1-10.0 sec/unlimited time

Delay Restart Range: 0.2-300 sec

Delay Restart Accuracy: 0.2 sec

211



9

Motor protection and control shall beprovided by an intell igent controldevice capable of manual or automaticcontrol.

Protection features available shallinclude trip and alarms for:

Overload with 12 overload curves

Phase unbalance

Welded/open contactor

Ground fault

Locked/stalled rotor

Thermistor for hot winding

Undercurrent and underpower

Additional alarms for abnormalconditions

Control features available shall include:

6 fixed control inputs for start A & B,stop, local isolator, contactor A & Bstatus

10 programmable inputs, each ofwhich can be assigned to any one of33 functions

2 contactors (A & B)

2 auxiliary relays, each of whichcan be assigned to any one of31 functions

One analog input with high and lowalarm and trip setpoints

Undervoltage auto restart

Motor current sensing shall be frominternal primary CTs up to 250 FLC.Ground sensing shall be from an exter-nal core balance CT or residually.

Metering values shall include: RMS current of each phase

RMS ground fault leakage current

Thermal capacity

Analog input

Motor load

Thermal capacity used

Unbalance

Power (kW)

Energy (kWh)

RMS voltage

GUIDEFORM SPECIFICATIONS

APPROVALS

: IEC 947-1, IEC 1010-1Quality Assurance System (registered by QMI):

UL Listed for USA and Canada

ISO: 9001 - 1994

PACKAGING

Max. Weight: 6 lbs 12 oz (3.1 kg)Shipping Dimensions: 12" x 9" x 7.5" (350 mm x 229 mm x 190 mm)

INSTALLATION

WARNING: HAZARD may result if the product is notused for its intended purpose.

FUSE TYPE/RATING

0.5 A 250 VFast blow, high breaking capacity

TYPE TESTS

Transients: ANSI/IEEE C37.90.1 Oscillatory/Fast Risetime TransientsIEC 801-4 Electrical Fast Transient/Burst Requirements

Impulse: IEC 255-5 5 kV Impulse Voltage TestRFI: 150 MHz, 450 MHz 5 W Handheld

Transmitter @ 25 cmStatic: IEC 801-2 Electrostatic DischargeHipot: 1500 V, 1 min all input > 30 V

ENVIRONMENTAL

Pollution Degree: 2Overvoltage Category: 2Insulation Voltage 300 VContinuous Operating Temperature:Peak Operating Temperature:

0

C to 60C, 16Hrs

(IEC60068-2-2)85

C

IP Class: IEC 529 IPX0

POWER SUPPLY

SUPPLY VOLTAGEAC Nominal: 120 VAC, range 80-135 VAC

240 VAC, range 150-250 VACFrequency: 50/60 HzPower Consumption: 25 VA (Maximum)

7 VA (Nominal)

COMMUNICATIONS

Type: RS485 2 wire, half duplexBaud Rate: 1,200-57,600 bpsProtocol: ModBus RTUFunctions: Read/write setpoints, read actual values,

execute commands, read coil status,read device status, loopback test

INPUTS

THERMISTOR INPUTSSensor Types: posit ive temperature coefficient PTC

RHOT=100-30,000 negative temperature coefficient NTCRHOT=100-30,000

Delay: 1 secAccuracy: 5% or 100 (whichever is greater)

ANALOG INPUTRange: 4-20 mAAccuracy: 1% of full scaleAlarm: Programmable 4-20 mATrip: Programmable 4-20 mAAccuracy: 2% of full scale readingIsolation: 15 V isolated, active source

OUTPUTS

RELAY CONTACTS

MM3 CONTACTOR A & B OUTPUT RELAYSVOLTAGE MAKE/CARRY MAX. OPERATING MAX. SWITCH.

CONTINUOUS CURRENT CAPACITY

RESISTIVE 30 VDC 8 A 8 A 2500 VA300 W

250 VDC 8 A 8 A 2500 VA300 W

INDUCTIVE 30 VDC 3.5 A 8 A 1250 VA220 W

(PF=0.4) 250 VDC 3.5 A 8 A 1250 VA220 W

CONFIGURATION SPST-NO Contactor A & B FormACONTACT MATERIAL SilverAlloy (AgCdO)MAX OPERATING VOLTAGE 380 VAC, 125 VDCMIN PERMISSIBLE LOAD 5 VDC, 100 mA

METERING

PHASE CURRENT INPUTSConversion: True RMS, sample time 1.67 msRange: 0.1 to 8 x phase CT primary amps

setpoint when external CTs are used.2 to 250 A, FLC < 32 A

Accuracy: (2% + 1)*

GROUND FAULT CURRENT INPUTConversion: True RMS, sample time 1.67 msRange: 0.1 to 1.0 x FLC amps setpoint

(residual connection)0.5 to 15.0 A (50:0.025 CT)

Full Scale: 1.5 x FLC amps setpoint(residual connection)15 A (50:0.025 CT)

Accuracy: (2% + 2)* (residual connection) FLC < 32 A (2% + 6)* (residual connection) FLC < 32 A50:0.025 CT: 0.3 A

*Accuracy is given as ([% of reading] + [number of least significant digits])

MONITORING

VOLTAGE INPUT/POWER READINGConversion: True RMS, sample time 1.67 msVoltage Full Scale: 1.5 x VT PrimaryVoltage Accuracy: 2% of VT Primary or

2% of reading, whichever is greaterPower Accuracy: 5% of nominal or

5% of reading, whichever is greaterInput Voltage: Nominal: 120 VAC or 240 VAC

Max: 250 VACVT Burden: 0.01 VA

ACCELERATION TIMERange: 0.5 to 125 sec, or OFFAccuracy: 0.5 sec

THERMAL COOLING TIMESRange: 5-1080 min when motor stopped

50% of motor stopped value whenmotor running

Accuracy: 1 minSTALLED ROTORRange: 1.15 to 4.50 x FLC, or OFFDelay Range: 0.5 to 5 secAccuracy: 0.5 sec

*Specifications subject to change without notice.

NOTE: It is recommended that all MM3 relays are powered up atleast once per year to avoid deterioration of electrolytic capaci-

tors in the p ower supply.

OUTPUTS

MM3 CONTACTOR AUX 1 & AUX 2 OUTPUT RELAYSVOLTAGE MAKE/CARRY MAX. OPERATING MAX. SWITCH.

CONTINUOUS CURRENT CAPACITY

RESISTIVE 30 VDC 8 A 8 A 2400 VA240 W

250 VAC 8 A 8 A 2000 VA240 W

INDUCTIVE 30 VDC 3.5 A 8 A 875 VA(PF = 0.4) 170 W

250 VAC 3.5 A 8 A 875 A170 W

CONFIGURATION SPST-NO + SPST-NC AUX 1 & 2 Form ACONTACT MATERIAL Silver Alloy (AgCdO)MAX OPERATING VOLTAGE 380 VAC, 125 VDCMIN PERMISSIBLE LOAD 5 VDC, 10 mA

ANALOG OUTPUTSOutput: 4-20 mAMax Load: 600 Max Output: 21 mAAccuracy: 2% of full scale readingIsolation: 36 V isolated, active source

MM3 TECHNICAL SPECIFICATIONS

7/31/2019 GE IMCC

8/8212


Motor Protection www GEindustrial com/pm

AccessoriesMM3PC software package supplied free

RS232 TO RS485 CONVERTER boxdesigned for harsh industrial environ-ments

5A PHASE CT: 300, 350, 400, 500, 600,750, 1000

50:0.025 Ground CT for sensitiveground detection on high resistancegrounded systems

Control key cover hides auto, manual

and start buttons

CUTOUT

6.49(164.8)

6.25(158.8)

0.10(2.54)

0.078 T Typ(2)8 PLACES

1.15(29.2)

0.17(4.3)

2.31(58.7)

3.47(88.1)

4.063(117.6)

4.073(117.6)

3.285(83.4)

3.75(95.3)

(4) - 0.156(4)

0.950(24.1)

0.704(17.9)

1.030(26.1)

0.704(17.9)

1.040(26.4)

2.270(57.7)

1.25(31.8)1.25(31.8)1.25(31.8)

3.963(100.7)

3.963(100.7)

2.950(74.9)

2.950(74.9)

1.475(37.5)

1.475(37.5)

NOTECT & MAIN MODULES

CAN BE SPLIT MOUNTED&

INTERFACED WITH CABLE

2.090(53.1)

2.622(66.6)

(4) - 0.156(4)

9.833(249.8)

8.850(224.8)

REAR VIEW3.600(91.5)

4.712(119.7)

SIDE VIEW FRONT VIEW MOUNTING DETAIL

CT MODULE

MAINMODULE

SIDE VIEW FRONT VIEW

DISPLAYMODULE

4.00(101.6)

6.750(171.5)

1.57(40)

0.85(21.6)

COMM PORTTO

MAIN MODULE

DISPLAY PORT

252627282930313233343536373839

1 2 3 4 5 6 7 8 9 1 011 121314 15

REMOTE CT PORT

161718192021222324

404142434445464748

WARNING

Checkvoltageswitchbeforeinstallation

RUNNING

STOPPED

TRIPPED

ALARM

RELAYA

RELAYB

AUX.RELAY1

AUX.RELAY2

MESSAGE

VALUE

STOP

CUTOUT

CUTOUT CUTOUT CUTOUT

CL CL CL

CL

MOUNTING DETAIL

SPLIT

LINE

809800A1.ai

DIMENSIONS

The motor manager shall generate atrip report each time a trip command isissued. It shall include the cause of thetrip and the pre-trip metering values.

Statistical data and routine maintenancealarms shall be included features of themotor manager.

A RS485 ModBus RTU connectionshall be used for communication. Itshall support operation at 1200 to57,600 bps. A RS232/485 convertermodule can be used to connect apersonal computer to the motormanager. Software shall be provided

to allow easy access to all features.

A remote panel mount model shallbe available with a 2 by 20 characterdisplay, control keys, and 10 LEDs toprovide local access wi thout acomputer.

GUIDEFORM SPECIFICATIONS continued

MM3 * * * *MM3 Product family

1 Option 1 basic unit

2 Option 2 full unit

E ESD relay

A Aux 2 relay

N No display (chassis unit)

W With local display

120 120 VAC control voltage

240 240 VAC control voltage

ORDERING

To order select the basic model and the desiredfeatures from the Selection Guide below.

www.GEindustrial.com/pm

Order online Order online

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Documents

GE IMCC