g
GE Power Management
MM3
RUNNING
STOPPED
TRIPPED
ALARM
RELAY ARELAY A
RELAY BRELAY B
AUX RELAY 1AUX RELAY 1
AUX RELAY 2AUX RELAY 2
MOTOR MANAGER 3
Instruction Manual
MM3 Revision: 1.00
Manual P/N: GEK-106295 (1601-0107-A2)
Copyright © 2001 GE Power Management
ACTUALACTUAL
SETPOINTSETPOINT
AUTAUTO
STSTOREORE
RESETRESET
MESSAGE
VALUE
MANUALMANUAL
®
STOP
Units must be powered up at least once per year to avoid deterioration
of electrolytic capacitors and subsequent relay failure.
NOTE
GE Power Management
215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: (905) 294-6222 Fax: (905) 294-8512
Internet:
KWWSZZZ*(LQGXVWULDOFRPSP
STARTASTART
STARTBSTART
A
B
R
E
D
G
E
R
I
E
S
T
Manufactured under an
ISO9001 Registered system.
These instructions do not purport to cover all details or variations in equipment nor provide for
every possible contingency to be met in connection with installation, operation, or maintenance.
Should further information be desired or should particular problems arise which are not covered
sufficiently for the purchaser’s purpose, the matter should be referred to the General Electric Company.
To the extent required the products described herein meet applicable ANSI, IEEE, and NEMA standards; but no s uch assurance is given with res pect to local codes and ordin ances because they
vary greatly.
TABLE OF CONTENTS
g
1. INTRODUCTION
2. INSTALLATION
1.1 OVERVIEW
1.1.1 DESCRIPTION..........................................................................................1-1
1.1.2 FEATURES................................................................................................1-1
1.1.3 ORDER CODES........................................................................................1-3
1.1.4 ACCESSORIES.........................................................................................1-3
1.2 TECHNICAL SPECIFICATIONS
1.2.1 MM3 SPECIFICATIONS.......................................... ..................... ............. 1-4
2.1 MOUNTING
2.1.1 DESCRIPTION..........................................................................................2-1
2.2 WIRING
2.2.1 TYPICAL WIRING DIAGRAM....................................................................2-3
2.3 INPUTS AND OUTPUTS
2.3.1 OVERVIEW................................................................................................ 2-4
a PHASE CT INPUTS................................................................................... 2-4
b GROUND FAULT CT INPUT (19/20)...................................... ...................2-4
c SUPPLY VOLTAGE (22/23/24)................................................................. 2-4
d GROUND (21/48) SURGE......................................................................... 2-4
e EXTERNAL CONNECTIONS..................................................... ...............2-4
f THERMISTOR INPUT (17/18)................................................................... 2-4
ANALOG INPUT (28/29)............................................................................2-4
h AUX 2 COIL (34/35)...................................................................................2-5
i OUTPUT RELAYS (36 - 47) ......................................................................2-5
j SERIAL COMMUNICATION PORT (25/26/27).......................................... 2-5
k SWITCH INPUTS (1 - 16).......................................................................... 2-6
l PROGRAMMABLE SWITCH INPUTS (1 - 10).......................................... 2-6
m STOP (11).................................................................................................. 2-6
n START A (12) AND START B (13)............................................................ 2-6
o LOCAL ISOLATOR N/O (14) ..................................................................... 2-6
p CONTACTOR STATUS (A: 15, B: 16) ....................................................... 2-6
q DIELECTRIC STRENGTH TESTING ........................................................2-7
3. HARDWARE
3.1 USER INTERFACE
3.1.1 DESCRIPTION..........................................................................................3-1
3.1.2 MESSAGE DISPLAY.. .. .. ......................... .................................... ............. . 3-1
3.1.3 INDICATOR LEDS..................................................................................... 3-2
3.2 KEYPAD
3.2.1 SETPOINTS KEY ...................................................................................... 3-3
3.2.2 ACTUAL VALUES KEY.............................................................................3-3
3.2.3 STORE KEY..............................................................................................3-4
3.2.4 ST OP KEY........................................................................ ...................... .. . 3-4
3.2.5 RESET KEY...............................................................................................3-4
3.2.6 START A KEY............................................................................................ 3-4
3.2.7 START B KEY............................................................................................ 3-4
3.2.8 MESSAGE UP/DOWN KEYS....................................................................3-5
3.2.9 MESSAGE LEFT/RIGHT KEYS................................................................. 3-5
3.2.10 VALUE UP/DOWN KEYS..........................................................................3-5
3.3 HARDWARE DESCRIPTION
3.3.1 MM3 DESIGN................................................................................. ........... 3-6
GE Power Management MM3 Motor Manager 3
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TABLE OF CONTENTS
4. SETPOINTS
4.1 OVERVIEW
4.1.1 DESCRIPTION ..........................................................................................4-1
4.1.2 SETPOINT MESSAGE ABBREVIATIONS ................................................4-1
4.1.3 SETPOINTS MESSAGE SUM MA R Y......... ............................................... 4-2
4.2 S1 CONFIGURATION
4.2.1 DESCRIPTION ..........................................................................................4-3
4.2.2 COMMUNICATIONS ................................................................................. 4-3
4.2.3 MOTOR IDENTIFICATION................................. ..................... ..................4-4
4.2.4 STARTER............................................... ..................... ..............................4-4
4.2.5 CT/VT INPUTS..........................................................................................4-6
4.2.6 THERMISTOR........................................................................................... 4-7
4.2.7 FAULT MODE........................................... ................................................. 4-7
4.2.8 STATISTICS...................... ........................................................................4-8
4.2.9 PROGRAMMABLE MESSAGE.................................................................4-8
4.2.10 PREFERENCES........................................................................................4-8
4.3 S2 PROTECTION
4.3.1 DESCRIPTION ..........................................................................................4-9
4.3.2 MOTOR PROTECTION – THERMAL......................................................4-10
4.3.3 MOTOR PROTECTION – GROUND FAULT...........................................4-11
4.3.4 MOTOR PROTECTION – OPTIONS....................................................... 4-13
4.3.5 LOAD PROTECTION............................................................................... 4-15
4.3.6 UNDER/OVERVOLTAGE PROTECTION ................. .............................. 4-17
4.4 S3 PROCESS
4.4.1 DESCRIPTION ........................................................................................4-18
4.4.2 PROGRAMMABLE INPUTS.................................................................... 4-19
4.4.3 INTERLOCK NAMES............................................................................... 4-23
4.4.4 STOP CONFIGURATION........................................................................4-24
4.4.5 ANALOG INPUT............................ ..................... ..................... ................4-24
4.4.6 PROCESS OPTIONS........ .......................................... ..................... ....... 4-26
4.5 S4 CONTROL
4.5.1 DESCRIPTION ........................................................................................4-27
4.5.2 UNDERVOLTAGE AUTO RESTART ......................................................4-27
4.5.3 AUX 1/2 RELAY CONFIG........................................................................4-28
4.6 S5 MONITORING
4.6.1 DESCRIPTION ........................................................................................4-31
4.6.2 PLANT CONDITION............................. ..................... ..................... ......... 4-31
4.6.3 PRESET COUNTERS AND TIMERS ...................................................... 4-32
4.7 S6 FACTORY DATA
4.7.1 DESCRIPTION ........................................................................................4-33
4.7.2 PRODUCT FIRMWARE IDENTIFICATION ............................................. 4-33
4.7.3 PRODUCT MODEL IDENTIFICATION....................................................4-34
4.7.4 FACTORY SERVICE DATA....................................................................4-34
4.8 MM3 STANDARD OVERLOAD CURVES
4.8.1 OVERLOAD CURVE TRIP TIMES.......................................................... 4-35
4.9 NEMA COMPATIBLE OVERLOAD CURVES
4.9.1 NEMA CURVE TRIP TIMES.................................................................... 4-37
4.10 S7 TESTING
4.10.1 DESCRIPTION ........................................................................................4-39
4.10.2 TEST CONFIGURATION.........................................................................4-39
4.10.3 TEST RELAYS AND LEDS......................................................................4-40
4.10.4 CURRENT SIMULATION ............................................ ............................ 4-41
4.10.5 ANALOG OUTPUT SIMULATION........................................................... 4-42
4.10.6 ANALOG INPUT SIMULATION ............................................................... 4-43
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MM3 Motor Manager 3
GE Power Management
TABLE OF CONTENTS
4.10.7 SWITCH INPUTS SIMULATION.............................................................. 4-44
4.10.8 THERMISTOR SIMULATION.................................................................. 4-46
5. ACTUAL VALUES
5.1 OVERVIEW
5.1.1 DESCRIPTION..........................................................................................5-1
5.1.2 DEFAULT MESSAGE SELECTION ..........................................................5-1
5.1.3 ACTUAL VALUES MESSAGE ABBREVIATIONS.....................................5-2
5.1.4 ACTUAL VALUES MESSAGE SUMMARY ............................................... 5-2
5.2 ACTUAL VALUES MESSAGES
5.3 A1 DATA
5.3.1 DESCRIPTION..........................................................................................5-3
5.3.2 MOTOR DATA......................................................... ..................................5-3
5.3.3 PROCESS DATA....................................................................................... 5-4
5.3.4 PR OGRAMMABLE MESSAG E ....... .............................................. .. .......... 5-4
5.4 A2 STATUS
5.4.1 DESCRIPTION..........................................................................................5-5
5.4.2 TRIP DATA ................................................................................................ 5-5
5.4.3 ALARM DATA............................................................................................5-6
5.4.4 MOTOR STATUS ...................................................................................... 5-8
5.5 A3 INPUTS
5.5.1 DESCRIPTION..........................................................................................5-9
5.5.2 INPUT CONTACTS STATUS............................................................. ....... 5-9
5.6 A4 STATISTICS
5.6.1 DESCRIPTION........................................................................................5-11
5.6.2 TIMERS................................................................................................... 5-11
5.6.3 COUNTERS.............................................................................................5-12
6. COMMUNICATIONS
6.1 MM3 MODBUS PROTOCOL
6.1.1 OVERVIEW................................................................................................ 6-1
6.1.2 ELECTRICAL INTERFACE.................................................... ...................6-1
6.1.3 DATA FRAME FORMAT AND DATA RATE.............................................. 6-1
6.1.4 DATA PACKET FORMAT.................................. ........................................6-2
6.1.5 ER ROR CHECK I N G ......... ........... .. ....................... .. ....................... .. .......... 6-2
a CRC-16 ALGORITHM................................................................................ 6-3
6.1.6 TIMING ...................................................................................................... 6-3
6.2 MM3 SUPPORTED FUNCTIONS
6.2.1 DESCRIPTION..........................................................................................6-4
6.2.2 FUNCTION CODE 01H .............................................................................6-4
6.2.3 FUNCTION CODE 03H .............................................................................6-5
6.2.4 FUNCTION CODE 04H .............................................................................6-6
6.2.5 FUNCTION CODE 05H .............................................................................6-7
6.2.6 FUNCTION CODE 06H .............................................................................6-8
6.2.7 FUNCTION CODE 07H .............................................................................6-9
6.2.8 FUNCTION CODE 08H ...........................................................................6-10
6.2.9 FUNCTION CODE 10H ...........................................................................6-11
6.3 ERROR RESPONSES
6.3.1 DESCRIPTION........................................................................................6-12
6.4 APPLICATIONS
6.4.1 PERFORMING COMMANDS USING FUNCTION CODE 10H............... 6-13
GE Power Management MM3 Motor Manager 3
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TABLE OF CONTENTS
6.4.2 STORING COMMUNICATIONS ADDRESS USING THE BROADCAST
COMMAND..............................................................................................6-14
6.4.3 USING THE USER DEFINABLE MEMORY MAP ................................... 6-15
6.4.4 USER DEFINABLE MEMORY MAP DEFAULT VALUES .......................6-16
6.5 MEMORY MAP
6.5.1 DESCRIPTION ........................................................................................6-18
6.5.2 MEMORY MAP TABLE............................................................................6-18
6.6 DATA FORMATS
6.6.1 DATA FORMATS TABLE ........................................................................ 6-37
7. TESTING
8. MM3PC SOFTWARE
7.1 INJECTION TESTING
7.1.1 PRIMARY INJECTION TESTING .............................................................. 7-1
7.1.2 SECONDARY INJECTION TESTING........................................................ 7-1
7.2 FUNCTIONAL TESTS
7.2.1 PHASE CURRENT FUNCTIONS.................................... ....................... ... 7-2
7.2.2 UN BALANCE EXAMPLES .. .. ............. .............. .. .. ............. ............. ............ 7 - 3
a EXAMPLE #1.............................................................................................7-3
b EXAMPLE #2.............................................................................................7-3
7.2.3 GROUND FAULT CURRENT FUNCTIONS............ ......................... ......... 7-3
7.2.4 INPUT FUNCTIONS................................. ................................................. 7-4
7.2.5 THERMISTOR INPUT TESTS...................................................................7-4
7.2.6 POWER FAIL TEST...................................................................................7-4
8.1 OVERVIEW
8.1.1 DESCRIPTION ..........................................................................................8-1
8.1.2 HARDWARE & SOFTWARE REQUIREMENTS ....................................... 8-1
8.1.3 CHECKING IF INSTALLATION/UPGRADE IS REQUIRED......................8-2
8.2 INSTALLING MM3PC
8.2.1 SOFTWARE INSTALLATION/UPGRADE .................................................8-3
8.3 CONFIGURATION
8.3.1 CONFIGURING MM3PC ...........................................................................8-4
8.3.2 MM3PC PROGRAM MENUS ....................................................................8-5
8.4 USING MM3PC
8.4.1 SAVING SETPOINTS TO A FILE................................ ..............................8-6
8.4.2 MM3 FIRMWARE UPGRADES................................................................. 8-7
8.4.3 LOADING SETPOINT FILES.....................................................................8-8
8.4.4 ENTERING SETPOINTS........................................................................... 8-9
8.4.5 VIEWING ACTUAL VALUES................................................................... 8-10
8.5 CHASSIS MOUNT UNITS
8.5.1 DESCRIPTION ........................................................................................8-12
8.5.2 SETTING THE BAUD RATE AND PARITY.............................................8-12
9. STARTER TYPES
iv
9.1 FV NON-REVERSING STARTER
9.1.1 DESCRIPTION ..........................................................................................9-1
9.1.2 MM3 SEQUENCES ........................................................... ..................... ... 9-1
9.2 FV REVERSING STARTER
9.2.1 DESCRIPTION ..........................................................................................9-3
MM3 Motor Manager 3
GE Power Management
TABLE OF CONTENTS
9.2.2 MM3 SEQUENCES ..................................................... ..................... ......... 9-4
9.2.3 NOTES.......... ..................... ............................................................. ........... 9-4
9.3 TWO SPEED STARTER
9.3.1 DESCRIPTION..........................................................................................9-6
9.3.2 MM3 SEQUENCES ..................................................... ..................... ......... 9-7
9.4 SLIP RING STARTER
9.4.1 DESCRIPTION........................................................................................9-11
9.4.2 MM3 SEQUENCES ..................................................... ..................... ....... 9-12
9.5 PRIMARY RESISTANCE STARTER
9.5.1 DESCRIPTION........................................................................................9-14
9.5.2 MM3 SEQUENCE.................................................................................... 9-15
9.6 INVERTER STARTER
9.6.1 DESCRIPTION........................................................................................9-17
9.6.2 MM3 SEQUENCES ..................................................... ..................... ....... 9-17
9.7 AUTOTRANSFORMER OPEN TRANSITION STARTER
9.7.1 DESCRIPTION........................................................................................9-19
9.7.2 MM3 SEQUENCES ..................................................... ..................... ....... 9-20
9.8 AUTOTRANSFORMER CLOSED TRANSITION STARTER
9.8.1 DESCRIPTION........................................................................................9-23
9.8.2 MM3 SEQUENCES ..................................................... ..................... ....... 9-24
9.9 PART WINDING STARTER
9.9.1 DESCRIPTION........................................................................................9-27
9.9.2 MM3 SEQUENCE.................................................................................... 9-27
9.10 WYE-DELTA OPEN TRANSITION STARTER
9.10.1 DESCRIPTION........................................................................................9-28
9.10.2 MM3 SEQUENCES ..................................................... ..................... ....... 9-29
9.11 WYE-DELTA CLOSED TRANSITION STARTER
9.11.1 DESCRIPTION........................................................................................9-31
9.11.2 MM3 SEQUENCE.................................................................................... 9-32
9.12 DUTY/STANDBY STARTER
9.12.1 DESCRIPTION........................................................................................9-34
9.12.2 MM3 SEQUENCES ..................................................... ..................... ....... 9-34
9.13 SOFT STARTER
9.13.1 DESCRIPTION........................................................................................9-36
9.13.2 MM3 SEQUENCE.................................................................................... 9-36
10. CONTROL WIRE
APPLICATIONS
10.1 TWO WIRE CONTROL
10.1.1 DESCRIPTION........................................................................................10-1
10.1.2 CONTROL OPERATION............................................................ ............. 10-1
10.2 HAND/OFF/AUTO CONFIGURATION
10.2.1 2-WIRE HAND / 2-WIRE AUTO...............................................................10-3
10.2.2 CONTROL OPERATION............................................................ ............. 10-3
10.2.3 3-WIRE HAND / 2-WIRE AUTO...............................................................10-5
10.2.4 CONTROL OPERATION............................................................ ............. 10-5
10.2.5 3 WIRE HAND / 3 WIRE AUTO .............................................................. 10-7
10.2.6 CONTROL OPERATION............................................................ ............. 10-7
10.3 HAND/AUTO CONFIGURATION
10.3.1 3-WIRE HAND / 2-WIRE AUTO...............................................................10-9
10.3.2 CONTROL OPERATION............................................................ ............. 10-9
GE Power Management MM3 Motor Manager 3
v
TABLE OF CONTENTS
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A. MM3 COMMISSIONING
SUMMARY
B. FREQUENTLY ASKED
QUESTIONS
C. DO’S AND DONT’S
D. ASYMMETRICAL
STARTING CURRENT
A.1 COMMISIONING SUMMARY
A.1.1 DESCRIPTION ..........................................................................................A-1
B.1 MM3 FAQ
B.1.1 QUESTIONS AND ANSWERS ..................................................................B-1
C.1 DO’S AND DONT’S
C.1.1 CHECKLIST...............................................................................................C-1
a MM3 GROUNDING............................................................................. .......C-1
b GROUNDING OF PHASE AND GROUND CTS............................. ...........C-1
c RS485 COMMUNICATIONS PORT ..........................................................C-1
d SWITCH INPUTS.................................. ..................... ..................... ...........C-2
e THERMISTOR AND ANALOG INPUTS ....................................................C-2
f STOP SWITCH INPUT ..............................................................................C-2
CONTACTOR STATUS FEEDBACK............ .......................................... ...C-2
D.1 ASYMMETRICAL CURRENT
D.1.1 OVERVIEW................................................................................................D-1
E. CT ISOLATION
F. TABLES AND FIGURES
G. EU DECLARATION OF
CONFORMITY
H. WARRANTY
E.1 CT ISOLATION
E.1.1 MM3 CT WITHSTAND...................... ..................... ..................... ...............E-1
E.1.2 CT SIZE AND SATURATION....................................................................E-1
F.1 TABLES AND FIGURES
F.1.1 LIST OF TABLES................... ........................................ ..................... .......F-1
F.1.2 LIST OF FIGURES ....................................................................................F-1
G.1 EU DECLARATION OF CONFORMITY
H.1 WARRANTY
H.1.1 GE POWER MANAGEMENT WARRANTY...............................................H-1
vi
MM3 Motor Manager 3
GE Power Management
1 INTRODUCTION 1.1 OVERVIEW
1 INTRODUCTION 1.1 OVERVIEW 1.1.1 DESCRIPTION
The MM3 combines control functio ns normally fou nd in a low vo ltage motor c ontrol center (MCC) with motor
protection. This comp ac t, mi cr op ro ce ss or ba se d dev i ce , pr ov ide s sop h isti ca ted con t rol a nd protective relayin g
at significant cost savings over an MCC design using discrete devices.
Standard features simplify maintenance and plant expansion. One MM3 is required for every starter unit in the
MCC. The contactor can be energi zed an d de-ener gized usi ng the MM3's d irect-wir ed inputs or via the s erial
port. Full voltage non-rever sing, full voltage Reversing, two-speed, autotransformer, inverter, wye-delta, sli p
ring, and part winding type starters may be completely controlled by the MM3 using the two contactor outputs.
Motor protection is inc luded for t he most c ommon c auses of fai lure to prev ent cost ly shutdown s and rewi nds.
These include three-phase overload, stalled rotor, ground fault and loss of phase.
A two-wire RS485 M odbus communic ations port is p rovided for high speed communic ations with a c omplete
line-up of MCCs. A ny MM3 may b e interrogated on demand to d etermine both ac tual and setpoi nt operating
parameters. Fast response time to a request for alarm or trip status makes real time control of a complete process possible. Statistical recording of running hours and number of starts and trips assists with predictive
maintenance scheduling.
1.1.2 FEATURES
The MM3 has been developed with economy in mind. The customer is able to choose from different options to
achieve maximum benef it from the relay when integrated into the process environment. The standard MM 3
comes with three-ph ase ov er load protection (49/51) , si ng le- ph as e, 4 co ntr ol inputs (Start, Stop , Lo ca l Is olator,
Contactor A status) plus 2 programmable inputs. The full version adds the following additional features:
nd
•2
contactor control (wye/delta, two speed, reversing, etc.) including all timers, relays and control inputs
1
• Undercurrent/underpower protection (37)
• Thermistor (49) input which accepts PTC and NTC thermistor types
• Analog input/output
• 6 more programmable inputs plus 2 control inputs
T able 1–1: MM3 OPTIONS
OPTION 1 (STANDARD) OPTION 2 (FULL)
Contactor A Contactor A
Serial Communications Serial Communications
4 Programmable Inputs 10 Programmable Inputs
4 Control Inputs 6 Control Inputs
3 Phase Inputs 3 Phase Inputs
1 Ground Fault Input 1 Ground Fault Input
Aux 1 Relay Aux 1 Relay
Aux 2 / ESD Relay Contactor B
VT Input Aux 2 / ESD Relay
VT Input
Thermistor Input
Analog In put
Analog Outp ut
GE Power Management MM3 Motor Manager 3 1-1
1
1.1 OVERVIEW 1 INTRODUCTION
Figure 1–1: FUNCTIONAL BLOCK DIAGRAM
1-2 MM3 Motor Manager 3 GE Power Management
1 INTRODUCTION 1.1 OVERVIEW
1.1.3 ORDER CODES
This instruction manual describes the features of a MM3 with all options included.
NOTE
Table 1–2: SELECTION GUIDE
MM3
Base Unit
MM3 Options
Display N | No Display (Chassis Unit)
Power 120 120 V AC Control Voltage
MM3
g g g g
|||| Product Family
1 | | | Option 1: Basic Unit
2 | | | Option 2: Full Unit
E | | ESD Relay
A | | Aux 2 Relay
W | With Local Display
240 240 V AC Control Voltage
Examples:
• MM3–2–E–N–120: full-featured MM3, ESD relay, Chassis mount unit with 120 V AC control power
• MM3–1–A–W–240: basic MM3 with Aux. 2 relay, Local Display and 240 V AC control power
1.1.4 ACCESSORIES
1
MM3PC Software:
•
RS-232/485:
•
5A Phase CT:
•
50:0.025 Ground CT:
•
Control key cover:
•
Software package to aid in setting up MM3 operating parameters (free)
RS232 to RS485 converter box designed for harsh industrial environments
300, 350, 400, 500, 600, 750, 1000
For sensitive ground detection on high resistance grounded systems
Covers the auto/manual LEDs, keys and keypad start buttons
GE Power Management MM3 Motor Manager 3 1-3
1.2 TECHNICAL SPECIFICATIONS 1 INTRODUCTION
1.2 TECHNICAL SPECIFICATIONS 1.2.1 MM3 SPECIFICATIONS
1
PHASE CURRENT INPUTS
CONVERSION: true RMS, sample time 1.67 ms
RANGE: 0.1 to 8 × Phase CT Primary Amps
setpoint when external CTs used
0.2 to 250 A; FLC < 32 A
1 to 2000 A; FLC ≥ 32 A
ACCURACY: ± (2% +1)
GROUND FAULT CURRENT INPUT
CONVERSION: true RMS, sample time 1.67 ms
RANGE: 0.1 to 1.0 × FLC Amps setpoint
0.5 to 15.0 A (50:0.025 CT)
FULL SCALE: 1.5 × FLC Amps setpoint
15 A (50:0.025 CT)
ACCURACY: ± (2%+2), FLC < 32 A
± (2%+6), FLC ≥ 32 A
± 0.3 A (50:0.025 CT)
† Accuracy given as: ± ([% of reading] + [number of least
significant digits])
VOLTAGE INPUT / POWER READING
CONVERSION: true RMS, sample time 1.67 ms
VOL TAGE FULL
SCALE: 1.5 × VT Primary
VOL TAGE
ACCURACY: ± 2% of VT Primary or 2% of read-
ing, whichever is greater
POWER ACCURACY:± 5% of nominal or ± 5% of re ad ing ,
whichever is greater
INPUT VOLTAGE: Nominal: 120 VAC or 240 VAC
Max: 250 VAC
VT BURDEN: 0.01 VA
OVERLOAD CURVES
TRIP TIME
ACCURACY: ± 200 ms up to 10 seconds
± 2% of trip time over 10 seconds
DETECTION LEVEL: ± 1% of primary CT Amps
GROUND FAULT TRIP TIME
ACCURACY: –0 ms/+50 ms
0.0 = less than 50 ms
ACCELERATION TIME
RANGE: 0.5 to 125 seconds or OFF
ACCURACY: ± 0.5 sec.
†
(Residual Connection)
(Residual Connection)
(Residual Connection)
THERMAL COOLING TIMES
RANGE: 5 to 1080 min. when motor stopped
50% of motor stopped value when
motor running.
ACCURACY: ± 1 minute
SINGLE PHASE
RANGE: greater than 30% U/B
ACCURACY: ± 2 percentage points
TRIP DELAY: 5 sec., ±1 sec.
CALCULATION METHOD:
IMI
–
IAVI
if
≥
FLC
IAVI
if
<
FLC
†
†
†
where:
I
= average phase current
AV
I
= current in a phase with maximum deviation from
M
I
= motor full load current setting
FLC
:
:
UB
UB
%
%
=
=
-------------------
I
AV
IMI
–
-------------------
I
FLC
A
100
×
A
100
×
I
AV
UNDERCURRENT
RANGE: 10 to 100% × motor FLC or OFF
DELAY RANGE: 1 to 60 seconds
ACCURACY: ±1 sec.
STALLED ROTOR
RANGE: 1.15 to 4.50× FLC or OFF
DELAY RANGE: 0.5 to 5 seconds
ACCURACY: ± 0.5 sec.
THERMISTOR INPUTS
SENSOR TYPES: positive temperature coefficient
R
PTC
= 100 to 30000 Ω
HOT
negative temperature coefficient
R
NTC
= 100 to 30000 Ω
HOT
DELAY: 1 second
ACCURACY: ± 5% or 100 Ω
(whichever is greater)
ANALOG INPUT
RANGE: 4 to 20mA
ACCURACY: ± 1% of full scale
ALARM: programmable 4 to 20 mA
TRIP: programmable 4 to 20 mA
ACCURACY: ±2% of full scale reading
ISOLATION: 15 V isolated, active source
ANALOG OUTPUTS
OUTPUT: 4 to 20 mA
MAX LOAD: 600 Ω
MAX OUTPUT: 21 mA
ACCURACY: ±2% of full scale reading
ISOLATION: 36 V isolated, active source
1-4 MM3 Motor Manager 3 GE Power Management
1 INTRODUCTION 1.2 TECHNICAL SPECIFICATIONS
g
g
RELAY CONTACTS
MM3 CONTACTOR A & B OUTPUT RELAYS:
VOLTAGE
30 VDC 8 A 8 A
RESISTIVE
INDUCTIVE
(PF=0.4)
CONFIGURATION
CONTACT MATERIAL SILVER ALLOY (A
MAX OPERATING
MIN PERMISSIBLE
250 VAC 8 A 8 A
30 VDC 3.5 A 8 A
250 VAC 3.5 A 8 A
VOLTAGE
LOAD
MAKE/CARRY
CONTINUOUS
SPST-NO ---CONTACTOR A & B
MAXIMUM
OPERATING
CURRENT
— FORM A
380 VAC, 125 VDC
5 VDC, 10 mA
MAXIMUM
SWITCHING
CAPACITY
2500 VA
300 W
2500 VA
300 W
1250 VA
220 W
1250 VA
220 W
CdO)
MM3 CONTACTOR AUX1 & AUX2 OUTPUT RELAYS:
VOLTAGE
30 VDC 8 A 8 A
RESISTIVE
INDUCTIVE
(PF=0.4)
CONFIGURATION
CONTACT MATERIAL SILVER ALLOY (A
MAX OPERATING
MIN PERMISSIBLE
250 VAC 8 A 8 A
30 VDC 3.5 A 8 A
250 VAC 3.5 A 8 A
VOLTAGE
LOAD
MAKE/
CARRY
CONTINUOUS
SPST-NO + SPST-NC --- AUX 1 & 2
Maximum
Operating
Current
— FORM C
CdO)
380 VAC, 125 VDC
5 VDC, 10 mA
Maximum
Switching
Capacity
2000 VA
240 W
2000 VA
240 W
875 VA
170W
875 VA
170 W
UNDERVOLTAGE - SUPPLY VOLTAGE
UNDERVOLTAGE: 65% of nominal (120 or 240 V AC)
immediate restart for maximum dip
time of 0.1 to 0.5 seconds or OFF
delayed restart for maximum dip
time of 0.1 or 10.0 seconds or
UNLIMITED time
DELAY RESTART RANGE: 0.2 to 300 seconds
DELAY RESTART ACCURACY: ±0.2 seconds
SUPPLY VOLTAGE
AC NOMINAL: 115 VAC, range 80 to 135 V AC
230 VAC, range 150 to 250 V AC
FREQUENCY: 50/60 Hz
POWER: 25 VA (maximum), 7 VA (nominal)
COMMUNICATIONS
TYPE: RS485 2-wire, half duplex
BAUD RATE: 1200 to 57K baud
PROTOCOL: Modbus RTU
FUNCTIONS: Read/write setpoints
Read coil stat us
Read actual values
Read device status
Execute commands
Loopback Test
TYPE TESTS
TRANSIENTS: ANSI/IEEE C37.90.1 Oscillatory/
Fast Risetime T r ans ie nts
IEC 801-4 Electrical Fast Transient/
Burst Requirements
IMPULSE: IEC 255-5 5kV Impulse Voltage Test
RFI: 150 MHz, 450 MHz 5W Handheld
Transmitter @ 25cm
STATIC: IEC 801-2 Electrostatic Discharge
HIPOT: 1500V, 1 Minute All input > 30 Volts
ENVIRONMENT / GENERAL INFORMATION
POLLUTION DEGREE: 2
OVERVOLTAGE CATEGORY: 2
INSULATION VOLTAGE: 300 V
OPERATING TEMPERATURE RANGE: 0°C to 60°C
IP CLASS: IEC 529 - IpX0
WEIGHT
MAX WEIGHT: 6 lbs. 12 oz. (3.1 kg)
SHIPPING BOX SIZE:12" × 9" × 7.5"
350 mm × 229 mm × 190 mm
FUSE TYPE / RATING
0.5 A, 250V Fast Blow, High breaking capacity
INSTALLATION
WARNING!: HAZARD may result if the product is not used for
its intended purpose
VENILA T ION REQUIREMENTS: None
CLEANING REQUIREMENTS: None
CERTIFICATION / COMPLIANCE
CE: IEC 947-1, IEC 1010-1
Registered to CSA CAN3.Z299.3-1985 & ISO 9001-1994
1
Design and specifications subject to change without notice.
It is recommended that all MM3 relays are powered up at least once per year to avoid deterioration of
electrolytic capacitors in the power supply.
GE Power Management MM3 Motor Manager 3 1-5
1
1.2 TECHNICAL SPECIFICATIONS 1 INTRODUCTION
1-6 MM3 Motor Manager 3 GE Power Management
2 INSTALLATION 2.1 MOUNTING
2 INSTALLATION 2.1 MOUNTING 2.1.1 DESCRIPTION
Cut the panel as shown below to mount the MM3. Us e eit her the #8 -32 or #6 x 1/2” mou nti ng scr ews prov ide d
to mount the MM3 to the panel.
2
Figure 2–1: MM3 DIMENSIONS
GE Power Management MM3 Motor Manager 3 2-1
2
STATUS INDICATORS:
RUNNING: Contactor is energized
and motor is running.
STOPPED: Contactor is not energized and motor is not running.
TRIPPED: Contactor is not energized. Motor is not running. The
MM3 has tripped the motor due to
a fault. Normally a cause of trip
message will be displayed.
ALARM: One or more alarm conditions are present. Normally a
cause of alarm message will be
displayed.
GROUND CT INPUT
50:0.025 ground fault
input.
Rear View
Front View
DISPLAY:
2 line, 40 character illuminated display
communicates all messages in simple
English for easy interpretation by users
unfamiliar with unit.
SUPPLY VOLTAGE
required to power the MM3
VOLTAGE INPUT
Phase A voltage input for
voltage and power monitoring.
SWITCH INPUTS
Opto-isolated 120/240 VAC live inputs for various interlock functions. The
interlock inputs are fully programmable and can be assigned to such
functions as setpoint access, plant interlock, test, and various others.
COMMUNICATIONS
RS485 2 wire serial
communication port
operates at 1200 - 57,600
bps for remote
commands, monitoring
and setpoint store.
ModBus
®
RTU protocol.
Ground
safety and
surge
THERMISTOR
NTC or PTC thermistor
input for hot winding
detection.
ANALOG INPUT/OUTPUT
4 - 20mA input for process
control monitoring /
alarming / tripping.
4 RELAYS
■Contactor A: direct on
line / forward / wye
■Contactor B: reverse / delta
■User programmable relay
(AUX 1)
■User programmable relay
(AUX 2)
PROGRAM KEYS:
ACTUAL VALUES: Press to enter
actual values mode to display actual motor values such as current,
ground leakage, thermal capacity.
SETPOINTS: Press to enter setpoint
mode to alter or examine setpoints.
STORE: Save a newly entered
setpoint.
RESET: Reset the MM3 after a trip.
MESSAGE: Move to the desired
setpoint or actual value message.
VALUE: Increment or decrement
currently displayed setpoint value.
CONTROL KEYS:
AUTO: Selects
operation of start via communication port.
MANUAL: Selects manual operation 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 POWER
120/240 VAC supply voltage
selector switch and fuse
access door
Ground safety
RESIDUAL GROUND INPUT
PHASE CT INPUTS
3 isolated phase CT inputs
2.1 MOUNTING 2 INSTALLATION
2-2 MM3 Motor Manager 3 GE Power Management
Figure 2–2: FEATURES
2 INSTALLATION 2.2 WIRING
2.2 WIRING 2.2.1 TYPICAL WIRING DIAGRAM
2
e
∗
∗
GE Power Management
∗
Figure 2–3: TYPICAL WIRING DIAGRAM
GE Power Management MM3 Motor Manager 3 2-3
2.3 INPUTS AND OUTPUTS 2 INSTALLATION
2.3 INPUTS AND OUTPUTS 2.3.1 OVERVIEW
a) PHASE CT INPUTS
For motor full-load cur rents up to 250 A, the phase c onductors can be directly co nnected to t he MM3 without
phase CTs. If external CTs are required, t he secondary w inding should be lo oped though the MM3 doughnut
opening.
Selected CTs should be capable of supplying the required current to the total secondary load which consists of
2
the connection wiring burden. The CT must not saturate under maximum current conditions which can be up to
8 times motor full load during starting.
b) GROUND FAULT CT INPUT (19/20)
The ground fault detection c onsists of a 50:0.025 input (Termin al 19) and a common input (Terminal 20) , or
residual connection of phase CTs (
ground CT is used for 5 A secondary CTs or for residual connection of phase CTs. Residual ground fault protection provides a sensi tivi ty of 10% of motor full load curren t. T he 50: 0.02 5 co re bal ance ( ze ro-s eq uen ce) CT
input can be used for improved sensitivity when measuring the ground fault current.
Care must be taken when turning ON the Ground Fault Trip feature. If the interrupting device
(contactor or circuit breaker) is not rated to break ground fault current (low resistance or sol-
NOTE
idly grounded systems), the feature should be disabled. The 50:0.025 input is only recommended to be used on resistance grounded systems. Where the system is solidly grounded
or high levels of current are to be detected use the 5 A ground input.
only the common input should be externally grounded
). The 5 A input on the
c) SUPPLY VOLTAGE (22/23/24)
A supply voltage o f 1 20/2 40 V AC at 50/60 Hz is requir ed to po wer the MM3. The la bel o n t he bac k o f th e uni t
specifies the volt age that has b een internally set. To chang e the voltage setting, ope n the sliding d oor on the
back of the MM3 and locate the su pply voltage selector slide switch. The se lector slide switch has a label
affixed to show the 120/240 V AC positions. Set the slide switch to the desired voltage.
d) GROUND (21/48) SURGE
This is an additional ground term inal provided for dissip ating transien t signals and surges. Thi s must be connected by a thick wire or braid to the system ground for reliable operation.
e) EXTERNAL CONNECTIONS
Signal wiring is to bo x ter minals that c an ac commoda te wir e as large as 1 2 gaug e. C T conn ection s are mad e
using #8 screw ring terminals that can accept wire as large as 8 gauge. Consult Figure 2–3: TYPICAL WIRING
DIAGRAM on page 2–3. Other features can be wired as required.
f) THERMISTOR INPUT (17/18)
Either a Positive Temperature Coefficient (PTC) or Negative Temperature Coefficient (NTC) thermistor may be
directly connected to the MM3. B y specifying the hot and cold thermistor resistance, the MM3 automatically
determines the thermisto r type as NTC or PTC. Use thermistors with hot and cold resis tance values in the
range 100 to 30000Ω. If no thermistor is connect ed, the
and
S1: CONFIGURATION \ THERMISTOR \ THERMISTOR ALARM
g) ANALOG INPUT (28/29)
S1: CONFIGURATION \ THERMISTOR \ THERMISTOR TRIP
setpoints must be set to
DISABLE
.
The MM3 accepts an analog input from a standard 4 to 20 mA source. This input can be used for process control monitoring to provide s tatus and/o r alarm and trip ping sign als related to the input sign al level. Th e analog
input messages (
names and units.
S3: PROCESS \ ANALOG INPUT
setpoints page) can be programmed to show user-defined
2-4 MM3 Motor Manager 3 GE Power Management
2 INSTALLATION 2.3 INPUTS AND OUTPUTS
h) AUX 2 COIL (34/35)
The AUX Relay 2 can be internally ener gi z ed by the MM3 or ex ternal ly ene rg ized by appl yi ng a +2 4 V DC signal to these terminals. Correct polarity is required (Terminal 35 = +24 V DC, Terminal 34 = 0 V DC).
i) OUTPUT RELAYS (36 - 47)
There are up to 4 output relays on the MM3. Contact switching rating for the output relays as well can be found
in Section 1.2: TECHNICAL SPECIFICATIONS on page 1–4.
• Contactor A Relay (46/47): non-reversing, forward, low speed, etc.
• Contactor B Relay (44/45): reversing, high speed, etc.
• AUX Relay 1 (40/41/42/43): field programmable
• AUX Relay 2 (36/37/38/39): field programmable or hardwired 24 V DC coil
j) SERIAL COMMUNICATION PORT (25/26/27)
A serial port provi des co mm uni ca tio n c apa bil ities to t he M M3. Multiple MM3 rela ys c an b e c onn ec ted to get her
with a 24 AWG stranded, shi eld ed twis ted -pai r with a c ha ract er ist ic i mpe dan ce of 120Ω such as Belden 984 1
or equivalent. The total length of communications wiring should not exceed 4 000 feet. Care should be u sed
when routing the communications wiring to avoid power AC lines and other sources of electrical noise.
Correct polarity is ess ential for the com municati ons port to opera te. Terminal 25 ("+") of every MM3 in a serial
communication l ink must be c onnected tog ether. Similarly, Terminal 26 ("–") of ever y MM3 must also be c onnected together. The shield wire must be connec ted to Terminal 27 (48 5 SERIAL GROUND) on ever y unit in
the link to provide a common ground potenti al for all units. Eac h relay should be "dai sy-chained" to the next
one. Avoid star or stub connected configurations if possible to avoid potential communication problems.
2
A terminating resistor and ca pacitor network is required to pre vent communication err ors. Only the last MM3
and the master comput er driver s hould have the terminati ng network to en sure pr oper matchi ng. Using term inating resistors an d capacitors on all the MM 3s would load down the commun ication network while omittin g
them at the ends could cause reflections resulting in communication errors.
Figure 2–4: RS485 TERMINATION
GE Power Management MM3 Motor Manager 3 2-5
2.3 INPUTS AND OUTPUTS 2 INSTALLATION
k) SWITCH INPUTS (1 - 16)
All switch inputs are opto-isolated and operate at 120 V AC. The switch reads closed when 120 V AC is applied
to the switch terminal. This 120 V AC can be supplied by an external source providing that the source is in
phase with the MM3 supply voltage. When the MM3 control voltage switch is set to 240 V AC, the switch circuit
also operates at 240 V AC.
l) PROGRAMMABLE SWITCH INPUTS (1 - 10)
2
These 10 inputs can be programmed to one of a number of different functions. Some of the available functions
are: Setpoint Access, Loc kout Rese t, Plant Interlo ck, Auto Star t, Remote Permi ssive, and Test. See setpoints
page
S3: PROCESS \ PROGRAMMABLE INPUTS
m) STOP (11)
If this terminal is de- en er gized, both contactor A an d c on tac tor B out put re lay s wi ll ope n c aus i ng t he c on tac tor
coils to de-energize. The stop input must be energized before the MM3 will process any start commands.
n) START A (12) AND START B (13)
When the start inpu t terminal s are energi zed, the co rresponding contactor ou tput relay is energize d provide d
all other valid start c ondi ti ons are me t. If a n y tri p oc cur s, both con tac tor ou tput s be co me d e- ene rg ized. Start A
input is used for all types of contactors, that is: Full Voltage Non-reversing, Reversing, Two-speed (low-speed),
Wye Delta Open Transition, Inverter, Slip Ring, Autotransformer, Part Winding, or Wye Delta Closed Transition.
Start B input is used for Reversing and Two-speed (high-speed) contactor control. Start inputs are usually
momentary unless two-wire control is used. Start A and B commands may also be initiated via the serial link.
for complete list of available functions.
o) LOCAL ISOLATOR N/O (14)
The local isolator NO auxiliary contacts are used to prevent motor starts in the event of the Local Isolator being
in the “open” position. T o prevent starts, the MM3 produces a trip when the Local Isolator input is open. A Local
Isolator Trip is automatically reset when the Local Isolator is re-closed.
The Local Isolator input can be enabled or disabled as required. The factory default is disabled.
p) CONTACTOR STATUS (A: 15, B: 16)
The MM3
open commands a nd also to displa y the state of th e contactor. There are two c ontactor status inpu ts on the
MM3, one for contactor A, the other for contactor B.
Auxiliary contacts mechanically linked to the contactor itself are used to feed back to the contactor status
inputs. No status change following a "start" command indicates an open contactor control circuit and no status
change following " stop" command indicates a wel ded contactor. Appropriate messages and alar ms are displayed for these conditions and the status can be read via the serial port.
If the motor contactor is externally energized, the MM3 will seal in the output relay and display an “EXTERNAL
ST ART” message. If the motor contactor is externally de-energized, the MM3 will drop out the output relay and
display an “EXTERNAL STOP” message.
must
know the state of the c ont actor at all times in order to detect di scr epa nci es i n contactor close/
2-6 MM3 Motor Manager 3 GE Power Management
2 INSTALLATION 2.3 INPUTS AND OUTPUTS
q) DIELECTRIC STRENGTH TESTING
It may be required to test a complete MCC wit h MM3s installed for dielectr ic strength. This is also known as
"flash" or "hipot" te sting. The MM3 is rated for 1800 V AC for 1 minute or 22 00 V AC for 1 second isolation
between switch inputs, relay outputs, VT voltage input, supply voltage inputs and Ground Terminals 21 and 48.
When performing diele ctric tests, the connection to the surge ground terminal (22) must be removed. A filter
network is used on the AC inpu t to filter out RF and EMI noise . The filter c apacitors and transient absorbe rs
could be damaged by the high voltages relative to surge ground on the AC input.
Under no circumstances should any inputs other than switches, relays, supply voltage, VT
input, and CT inputs be dielectric tested.
CAUTION
2
GE Power Management MM3 Motor Manager 3 2-7
2
2.3 INPUTS AND OUTPUTS 2 INSTALLATION
2-8 MM3 Motor Manager 3 GE Power Management
3 HARDWARE 3.1 USER INTERFACE
3 HARDWARE 3.1 USER INTERFACE 3.1.1 DESCRIPTION
Once the MM3 has been wir ed and po wered on, it i s ready to be prog ramm ed for a spec ific app lica tion. Loc al
programming is done u sing the front panel key pad and the 40-characte r alphanumeric display. Remote programming via the serial port is also possible using the MM3PC software.
3.1.2 MESSAGE DISPLAY
A 40 character displa y commun icates sy stem informa tion to the u ser. Trip and alarm messages automatic ally
override the currently -displ ayed m essage. If no key is pres sed fo r 2 minute s, a user -selec ted defa ult mes saging sequence will be di splay ed. If the mo tor is current ly stopped , the Motor Status messa ge will be the de fault
message. Once the motor is started, the first user-selected message appears.
3
RUNNINGRUNNING
STOPPEDOPPED
TRIPPED
ALARM
STOP
ACTUAL
SETPOINT
RELAY ARELAY A
RELAY BRELAY B
AUX RELAY 1AUX RELAY 1
AUX RELAY 2AUX RELAY 2
AUTO
STARTASTART
Figure 3–1: FRONT PANEL
A
STORE
RESET
MESSAGE
VALUE
MANUAL
STARTBSTART
B
809773A1.CDR
GE Power Management MM3 Motor Manager 3 3-1
3
STARTB
3.1 USER INTERFACE 3 HARDWARE
3.1.3 INDICATOR LEDS
RUNNING
•
the correct state, the RUNNING indicator will be on. Current flow does not affect the indicator, only contactor status.
STOPPED
•
TRIPPED
•
long as this indicator is on, the motor cannot be started. It is cleared using the reset key, lockout reset facility or serial port reset, dependent on the type of trip.
ALARM
•
rent alarm status.
FAULT
•
must be replaced or repaired.
CONTACTOR A
•
CONTACTOR B
•
AUX 1
•
AUX 2
•
AUTO
•
mode the Start A / Start B s witch inputs and / keys a re non-ope rational but serial po rt start
commands are operationa l. In the Hardwired A uto Mode, the Auto Start A and Auto Start B switch inputs
are functional in c onj uncti on with the A uto Permissive sw itch inp ut. Ser ial, faceplate and rem ote sta r ts ar e
disabled. STOP commands from any location are always operational.
: Whenever contactor A and/or B relays are closed and the contactor status inputs acknowledge
: If both contactors A and B are in the OFF state, the STOPPED indicator will be on.
: If a trip condition causes the A or B contactor relays to de-energize, this indicator will be on. As
: If an alarm condition is present this indicator will be on. Use
: If an internal fault withi n the MM3 is det ected by s elf-checki ng, this in dicator wil l be on. Th e MM3
: If the Contactor A Relay is energized, this indicator will be on.
: If the Contactor B Relay is energized, this indicator will be on.
: If Auxiliary Relay # 1 is on, this indicator will be on.
: If Auxiliary Relay # 2 is on, this indicator will be on.
: If the MM3 is in Auto control mode or the Hard-Wi red Auto mode, thi s indicator will be on. In Auto
STARTA
A2: STATUS \ ALARM DATA
to view cur-
MANUAL
•
Start B switch inputs, AUTO START A / AUTO START B switch inputs and / keys are operational but serial port start commands are ignored. All stop commands are operational.
: If the MM3 is in Manual c ontrol mode, this indicat or will be on. In Manual mode the Start A /
STARTA START B
3-2 MM3 Motor Manager 3 GE Power Management
3 HARDWARE 3.2 KEYPAD
MESSAGE
ACTUAL
MESSAGE
3.2 KEYPAD 3.2.1 SETPOINTS KEY
FUNCTION
SETPOINT
: The key allows the us er to examine and alter tr i p, a larm , an d o ther M M3 se tpoi nts . Th er e
are seven setpoints pages:
• Page 1: Configuration
• Page 2: Protection
• Page 3: Process
• Page 4: Control
• Page 5: Monitoring
• Page 6: Factory Data
• Page 7: Testing
EFFECT
on the display before pressing the key, setpoints page S1 will be shown:
: Pressing this key displays the beginning of the next page of setpoints data. If actual values data was
SETPOINT
]] SETPOINTS
]] S1: CONFIGURATION
USE
: This key can be pressed at any time to view the setpoints. To scroll through the setpoint pages, press the
SETPOINT
key. To go from section to section within a page, press the and keys. To go from
line to line within a section, press the and keys.
To alter a setpoin t, the and keys can be used. All setpoi nts can be increm ented or decre-
VALUE
MESSAGE
VALUE
mented to pre-determined limits. When the desired value is reached, the key must be used to save the
MESSAGE
STORE
new setpoint. If an altered setpoint is not stored, the previous value will still be in
MESSAGE
effect. All control and protec-
tion features continue to operate while setpoints data is displayed.
3
3.2.2 ACTUAL VALUES KEY
FUNCTION
ACTUAL
: The key allows the user to examine all of the actual motor operating par ameters. There
are four pages of actual values data:
• Page 1: Data
• Page 2: Status
• Page 3: Inputs
• Page 4: Statistics
EFFECT
: Pressing this key will cause the display to show the beginning of the next page of actual values data.
If setpoints data was on the display before pressing the key, actual values page A1 will be shown:
]] ACTUAL VALUES
]] A1: DATA
USE
: This key can be presse d at any time to view actual v alues. To scroll through th e actual values pages,
MESSAGE
VALUE
ACTUAL
MESSAGE
VALUE
press the key. To go from section to section within a page, pre ss the and keys.
To go from line to line within a section, press the and keys.
The and keys have no effect when actual values data is displayed.
MESSAGE
GE Power Management MM3 Motor Manager 3 3-3
3.2 KEYPAD 3 HARDWARE
3.2.3 STORE KEY
FUNCTION
EFFECT
: When this key is pr essed the cur rently displa yed setpoint will be stored in non-volati le memory and
STORE
: The key allows the user to store new setpoints into internal memory.
will immediately come into effect. When a setpoint is stored, the following flash message will appear on the display:
NEW SETPOINT
STORED
USE:
STORE
The key can be us ed on ly i n SE TPOINTS mode to store new s etpoin ts, o r in ACT UAL VALUES
mode to select a new default message.
3
3.2.4 STOP KEY
FUNCTION
EFFECT
: The key allows the user to stop the motor directly from the MM3 faceplate interface.
: Pressing this key causes the Cont actor A and Contactor B output relays to de-energize, therefore
dropping out the motor contactor.
USE
: The key is used to stop the motor.
FUNCTION
EFFECT
STOP
: The key allows the user to reset MM3 trips.
: Pressing this ke y wi ll reset a tripped state on the MM3. A message indic at ing that a res et is n ot po s-
sible will be displayed if the condition causing the trip is still present.
STOP
3.2.5 RESET KEY
RESET
USE
RESET
: The key can be used to reset all trip conditions from the faceplate. A Ground Fault, Stalled Rotor
and Overload Trip can be assigne d to the LOCKOUT RESET feature on one of the programmable switch
inputs for added safety. The factory default allows the resetting of all trips using the front panel reset key.
3.2.6 START A KEY
FUNCTION
EFFECT
USE
: Pressing this key will cause the programmed start sequence to begin.
: The key is used to st art the motor from the f aceplate of the MM 3. Start A can also be in itiated
STARTA
: The key can be used to start the motor.
STARTA
from the start switch inputs at the back of the MM3 or from the serial port.
3.2.7 START B KEY
FUNCTION
EFFECT
USE
: Pressing this key will cause the programmed start sequence to begin.
: This key is u sed to start a reversin g or t wo speed motor from th e faceplate of the MM3. Sta rt B
STARTB
: The key can be used to start the motor.
STARTB
can also be initiated from the start switch input at the back of the MM3 or from the serial port.
3-4 MM3 Motor Manager 3 GE Power Management
3 HARDWARE 3.2 KEYPAD
3.2.8 MESSAGE UP/DOWN KEYS
FUNCTION
MESSAGE
: The and keys allow the user to move to the next or previous section of the
MESSAGE
currently selected page.
EFFECT
: Pressing the key displays the next sect ion of the current page. Pr essing the
MESSAGE
MESSAGE
key displays th e previous sec tion of the cur rent page. Note: If either key i s held for mor e than 1 second , the
next or previous sections will be selected at a fast rate. When the cu rrent display is at a page heading, th e
MESSAGE
key has no effect. W hen the curr ent displa y is at the end of the page, the key has n o
MESSAGE
effect.
USE
: These keys can be used at any time to move through the sections of the currently selected page
3.2.9 MESSAGE LEFT/RIGHT KEYS
FUNCTION
MESSAGE MESSAGE
: The and keys allo w the user to scan the ne xt or previous line of th e cur-
rently selected section.
EFFECT
: Pressing the key displays the n ext line of the curre nt section. Pressing t he
MESSAGE MESSAGE
key displays the pre vi ous li ne o f the cur r ent sec tio n. If ei the r k ey is held for mor e th an on e se co nd, th e nex t or
previous line will be selected at a fast rate. If the display shows a section heading, the key will have
no effect. If the key has no effect, the display is showing the last line of a section.
USE
: These keys can be used at any time to move through the lines of the currently selected section.
MESSAGE
MESSAGE
3.2.10 VALUE UP/DOWN KEYS
FUNCTION
STORE
key.
VALUE
: The and keys allow th e user to change setpoint values prior to pressing th e
VALUE
3
EFFECT
VALUE
: Pressing the key will increment the currently displayed setpoint value. Pressing the
key will decrem ent the curr ently disp layed se tpoint value. If t he displ ay shows an actual v alue thes e
VALUE
keys will have no effect
USE
: These keys can be used any time to change the value displayed in the setpoint messages.
GE Power Management MM3 Motor Manager 3 3-5
3.3 HARDWARE DESCRIPTION 3 HARDWARE
3.3 HARDWARE DESCRIPTION 3.3.1 MM3 DESIGN
A 16 bit 68HC16 microcont roller IC performs program executi on and control log ic for the MM3. It has an 8 or
16 bit bus width which can be selected dynamically with each external memory fetch allowing a mix of 8 and 16
bit devices. Internal c lock rate i s 16 Mhz. Instruc tio ns are s tor ed in a 512 K×8 bit flash memory, data is stored
in an 32K×8 RAM while setpoints and accumulated data are stored in a 8K×8 EEPROM.
An intelligent dis play module with its own micropro cessor, memory an d command set is accessed through
communications channel on the ma in CPU bo ard. The d isplay, a 4×4 keypad and the front panel LEDs data
are exchanged via modbus data packets.
External switch in puts are driven wi th the same vo ltage applie d to the control v oltage 120 or 240 V AC which
triggers an optocoupler for isolation. All control logic based on the state of these inputs determines operation of
up to 4 output relays which are al so driven from a latch under pro gram control. Lik e the inputs, the rel ay out-
3
puts are driven from an isolated power supply and optocoupler to prevent switch ing transient energy from
affecting the CPU.
A 10 bit successive approximation A/D on the 68HC16 CPU with 8 channels is used to measure all analog signals. Separate AC inpu ts for phase 1, phase 2, phase 3, and ground faul t signals are sample d at a 1.67 ms
rate, squared and summed. RMS cur rent i s the n dete rmin ed by deriv i ng the squar e ro ot of the sample d wav eform over several cycles. The sampling time is set to measure an integral number of cycles to reduce the
affects of noise and harmonics. Thermistor, analog input, control supply voltage and internal reference voltage
are also monitored. A n external precision 5 V DC reference i s used as the input referen ce for the A/D converter.
When power to the unit i s remov ed, a smal l 8-b it process or (68 HC705) wil l cont inue to operate fo r a pe riod of
at least 1 hour. This processor is po wered from a large back up c apaci tor. The 68HC705 accur ately meas ures
the time that the M M3 has b een wi tho ut control power. When power is re-ap pl ied th e m ain pr o cess or wi ll r ea d
the time off from the small p rocessor an d then ver y accurate ly calcul ate the ther mal capacit y value. T his tim e
off value is also used for the undervoltage restart feature.
Serial communica tions at up to 576 00 baud is implemented with a UART. All nec essary timing and control is
performed inside the ch ip. An extern al transcei ver chip converts th e digital dat a to an RS485 int erface. Dir ection, receive data and transmit data are on the input side with a two wire twisted pair driver on the output.
AC control voltage to pow er the MM3 can be selected as 120 or 240 V AC using a switch and dual woun d primary transformer. A filter is incorporated between the incoming supply and transformer primary to prevent transients from affecting the circuitry.
Separate, isolated sec ondar y suppl ies are us ed for CPU po wer, I/O and communication dr ivers. Optoco uplin g
and transformer coupling are used between isolated circuits to prevent transients from upsetting program execution. The 68HC705 is used to provide separate watc hdog timer and pow er fail monitoring co ntrol to ensure
that the main CPU starts and oper ates un der any i nput vol tage con ditions. Should nor mal pr ogram exe cution
fail, the 68HC705 resets the main CPU.
3-6 MM3 Motor Manager 3 GE Power Management
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