Specifications

I1
GE Limitamp
®
Medium Voltage Motor Control
Typical Elementary Diagrams
I
Limitamp Control Standard Nomenclature
1AM AC AMMETER
2AM DC AMMETER
A ACCELERATING CONTACTOR
AIL AMBER INDICATING LIGHT
AM AMMETER
AMS AMMETER SWITCH
AT AUTOTRANSFORMER
AX ACCELERATION TIMING RELAY
BFI BLOWN FUSE INDICATOR
BFIPS BLOWN FUSE INDICATOR POWER SUPPLY
BFT BLOWN FUSE TRIP
BIL BLUE INDICATING LIGHT
C CAPACITOR
CC CLOSING COIL
CB CIRCUIT BREAKER
CD CALIFORNIA DISCONNECT
CEM CONTACTOR ECONOMIZING MODULE
CM FIELD CURRENT CALIBRATION MODULE
CPD CAPACITOR TRIP DEVICE
CPI CONTROL POWER INTERLOCK
CPIX AUX. RELAY TO CPI
CPS CONTACTOR POSITION SWITCH
CR CONTROL RELAY
CT CURRENT TRANSFORMER
CTB CURRENT TEST BLOCK
CTD CURRENT TRANSDUCER
D DIODE
DCCT DC CURRENT TRANSFORMER
DR DIFFERENTIAL RELAY
DSTB DISCONNECT TERMINAL BOARD
DSW DISCONNECT SWITCH
EFR EXCITER FIELD RELAY
EPM ELECTRONIC POWER METER
ETM ELAPSED TIME METER
EXC EXCITER
EXC RHEO EXCITER THEOSTAT
F1.F2 SYNC. MOTOR FIELD LEADS
FC FIELD CONTACTOR
FCX AUX. FIELD RELAY
FCY AUX. FIELD RELAY
FDRS FIELD DISCHARGE RESISTOR
FGRS FIELD GROUND RESISTOR
FLD SYNC. MOTOR FIELD
FLR FIELD LOSS RELAY
FLTR FILTER
FRP FIELD RECTIFIER PANEL
FS FAST SPEED CONTACTOR
FS1 FAST SPEED SHORTING CONTACTOR
FSX AUX. RELAY TO FS
FSW FEEDER SWITCH
FTRS FIXED TAP RESISTOR
FU FUSE
GCT GROUND CURRENT TRANSFORMER
GF GROUND FAULT RELAY
GFX AUX. RELAY TO GF
GIL GREEN INDICATING LIGHT
GND GROUND
GRB GROUND BUS
GS GROUND SENSOR
H1.H2.H3 OUTGOING TERMINALS TO TRANSFORMER
HAM HEATER AMMETER
ISW ISOLATING SWITCH
ISR INCOMPLETE SEQUENCE RELAY
KX ANTI-KISS RELAY
L.O. LATE OPENING
L1.L2.L3 INCOMING TERMINALS OR AC BUS
LA LIGHTNING ARRESTOR
LIT LIGHT
LOR LOCKOUT RELAY
LSW LIGHT SWITCH
M239 MULTILIN MOTOR PROTECTION RELAY
M269 MULTILIN MOTOR MANAGEMENT RELAY
M269+ MULTILIN MOTOR MANAGEMENT
& COMMUNICATION RELAY
M369 M369 MOTOR MANAGEMENT RELAY
M469 M469 MOTOR MANAGEMENT RELAY
M MAIN CONTACTOR
MOT MOTOR
MOV METAL OXIDE VARISTOR
MR CONTACTOR HOLDING RESISTOR RELAY
MSW MAIN DISCONNECT SWITCH
MX AUX. RELAY TO M
N NEUTRAL CONTACTOR
NX AUX. RELAY TO N
OC OPERATIONS COUNTER
OCR OVERCURRENT RELAY
OL OVERLOAD RELAY
OT OVERTEMPERATURE RELAY
OTX AUX. RELAY TO OT
PM POLARITY MARK
PB PUSH BUTTON
PFC POWER FACTOR CAPACITOR
PFM POWER FACTOR METER
PG PLUG
PHA.PHB.PHC INCOMING LINE TERMINALS
PHF OPEN PHASE & PHASE SEQUENCE RELAY
PLR POWER LOSS RELAY
PQM PQM POWER QUALITY METER
PRO CT PROTECTOR
PT POTENTIAL TRANSFORMER
PTB POTENTIAL TEST BLOCK
R RUN OR REVERSE CONTACTOR
REC RECTIFIER
RECP RECEPTACLE
REV REVERSE CONTACTOR
RIL RED INDICATING LIGHT
RM RECTIFIER CONTACTOR
RS RESISTOR
RTD RESISTANCE TEMPERATURE DETECTOR
RX AUX. RELAY TO R
S START CONTACTOR
SC SURGE CAPACITOR
SFC STATIC FIELD CONTACTOR
SH SHUNT
SHAM SPACE HEATER AMMETER
SP HTR SPACE HEATER
SPR STALL PROTECTIVE RELAY
SR STARTING REACTOR
SR735 MULTILIN FEEDER RELAY
SR737 MULTILIN FEEDER RELAY
SS SLOW SPEED CONTACTOR
SS1 SLOW SPEED SHORTING CONTACTOR
SSW SELECTOR SWITCH
SSX AUX. RELAY TO SS
ST STAB
STB SHORTING TERMINAL BOARD
SX AUX. RELAY TO S
T TRANSFORMER
TA AUX. RELAY TO TIMING MODULE
TC TIME CLOSING
TDAD TIME DELAY AFTER DE-ENERGIZATION
TDAE TIME DELAY AFTER DE-ENERGIZATION
TO TIME OPENING
T1.T2.T3 OUTGOING TERMINALS TO MOTOR
TB TERMINAL BOARD
TH THERMOSTAT
TIE TIE SWITCH
TM TIMING MODULE
TPI TEST POWER INTERLOCK
TPIX AUX. RELAY TO TPI
TPSW TEST POWER SWITCH
TR TIMING RELAY
TRP TRIP RELAY
TST THERMOSTAT ON AT OR SR
TSW TEST-NORMAL SELECTOR SWITCH
UC UNLATCH COIL OR CONTACT
UL UNLATCH RELAY
UV UNDERVOLTAGE RELAY
UVTR UNDERVOLTAGE TIMING RELAY
VCR VOLTAGE CHECK RELAY
VDN VOLTAGE DIVIDER NETWORK
VFC ELECTRONIC VARIABLE FIELD CONTACTOR
VFSM VARIABLE FIELD SUPPLY MODULE
VM VOLTMETER
VMS VOLTMETER SWITCH
VRM VARMETER
VRTD VAR TRANSDUCER
VT VARIABLE AUTOTRANSFORMER
VTD VOLTAGE TRANSDUCER
WHDM WATTHOUR DEMAND METER
WHM WATTHOUR METER
WM WATTMETER
WTD WATTS TRANSDUCER
This diagram shows starter with the isolating switch in the disconnect position and the test power interlock in the test position.
To test: Handle must be in the disconnect (OFF) position, and test-normal selector switch (located in the low voltage compartment)
must be in the TEST position. Purchaser is to connect his test power to the proper terminals and note that the control circuit is not
grounded when disconnects are open. Be sure to turn the test-normal switch to NORMAL before moving the disconnect handle to
the ON position.
CPI — Opens only when CPI release on isolating switch handle is pushed in. Can not be opened when main line contactor is closed.
s — Start and stop push buttons are wired through terminal at “TB” in order that remote START-STOP buttons can be readily
connected into the circuit when required.
n — At a terminal on “TB”, a loop in the CT secondary circuit wire permits insertion of a hook on ammeter for measuring line current.
— Device furnished by others — mounted remote.
— Terminal board point.