ACM - AC Meter
ACS - Alarm Control Switch
ALM - Alarm Module
ALS - Alarm Silence Push Button
ALT - Alternator
AM - Ammeter
ANSI - American National Standards Institute
AR - Arming Relay
ARAL - Air Inlet Restriction Alarm Lamp
ARSL - Air Inlet Restriction Shutdown Lamp
ASL - Automatic Start Lamp
ASOS - Air Shutoff Solenoid
ASR - Air Shutoff Relay
ASSS - Automatic Start/Stop Switch
ASTR - Automatic Start Relay
ASSV - Air Start Solenoid Valve
ATB - AC Transformer Box
AUX - Auxiliary Terminal Strip
AVS - Ammeter/Voltmeter Phase Selection Switch
AWG - American Wire Gauge
BATT - Battery
BC - Battery Charger
BCA - Battery Charger Ammeter
BCF - Battery Charger Failure
BPT - Bus Potential Transformer
BRT - Brake Relay Timer
BTAL - Bearing Temperature Alarm Lamp
BTSL - Bearing Temperature Shutdown Lamp
C - Capacitor
CBCL - Circuit Breaker Close Lamp
CBCR - Circuit Breaker Close Relay
CBOL - Circuit Breaker Open Lamp
CBR - Circuit Breaker Relay
CBS - Circuit Breaker Switch
CCM - Customer Communication Module
CDL - Cool Down Lamp
CDM - Engine Cooldown Timer Module
CDTR - Cooldown Trip Relay
CIM - Customer Interface Module
CLFLS - Critical Low Fuel Level Switch
CONV - Converter
CPT - Circuit Breaker Power Transformer
CPU - Central Processing Unit
CRFTH - Control Room Fan Thermostat
CT - Current Transformer
CTR - Crank Termination Relay
D - Diode
DBR - Dead Bus Relay
DBRS - Dead Bus Relay Switch
DC LTS - DC Lights
DCPS - DC Power Supply
DCT - Droop Current Transformer
DCV - DC Voltmeter
DCV - Direct Current Volts
DRS - Diagnostic Reset Switch
DS - Disconnect Switch
DT - Distribution Transformer
DTCB - Distribution Transformer Circuit Breaker
DVR - Digital Voltage Regulator
ECLC - Engine Coolant Loss Connector
ECLS - Engine Coolant Loss Sensor
ECS - Engine Control Switch
ECTS - Engine Coolant Temperature Sensor
EFCR - Electrical Fault Cooldown Relay
EFL - Emergency Fuel Light
EG - Electronic Governor (Speed Sensing)
EGA - Electronic Governor Actuator
EGR - Electronic Governor Relay
EGR - Engine Governor Relay
EHC - Ether Hold-In Coil
EHS - Ether Hold-In Switch
EIS - Electronic Ignition System
EISM - Electronic Ignition System Module
ENFR - Engine Failure Relay
EOTS - Engine Oil Temperature Sensor
EOPS - Engine Oil Pressure Sensor
EPC - Ether Pull-In Coil
EPS - Ether Pull-In Switch
ES - Ether Solenoid
ESL - EIS Shutdown Lamp
ESPB - Emergency Stop Push Button
ESL - Emergency Stop Light
ESR - Enable Sensor Relay
F - Fuse
FCL - Fuel Containment Lamp
FCR - Fuel Control Relay
FCT - Fuel Containment Timer
FCTM - Fuel Control Timer Module
FES - "FLOAT/EQUALIZE" Switch
FL - Flasher Signal
FM - Flasher Module
FPL - Failed Parallel Lamp
FPT - Failed Parallel Timer
FRB - Fuel Rupture Basin
FS - Fuel Solenoid
FSOS - Fuel Shutoff Solenoid
G - Generator
GBTM - Generator Bearing Temperature Monitor
GFR - Generator Fault Relay
GMR - Generator Multifunction Relay
GND - Ground
GOL - Generator On Load
GOV - Governor
GPHI - Ground Post (High Voltage)
GPLO - Ground Post (Low Voltage)
GRR - Genset Run Relay
GS - Governor Switch
GSC - Generator Set Control
GSM - Governor Synchronizing Motor
GSR - Generator Synchronize Relay
GSOV - Gas Shutoff Valve
HRN - Horn Signal
HR - Horn Relay
Hz - Hertz
IC - Initiate Contact
IDS - "ISOCHRONOUS" or "DROOP" Switch
IRS - "IDLE" or "RATED" Switch
JWHR - Jacket Water Heater Relay
KWR - Kilowatt Level Relay
L - Load Leads
LCS - Louver Control Switch
LCT - Louver Close Timer
LDR - Louver Driver Relay
LFL - Low Fuel Level Light
LFLR - Low Fuel Level Relay
LFLAS - Low Fuel Level Alarm Switch
LFS - Latching Fuel Control Solenoid
LOAL - Low Oil Alarm Lamp
LOCS - Local Control Switch
LOLA - Low Oil Level Alarm lamp
LOLAS - Low Oil Level Alarm Switch
LOLS - Low Oil Level Switch
LOT - Louver Open Timer
LPR - Louver Position Relay
LSFL - Load Share Fault Lamp
LSFR - Load Share Fault Relay
LSM - Load Share Module
LTR - Lamp Test Relay
LUFL - Lead Unit Failure Lamp
LUFT - Lead Unit Failure Timer
LUS - Lead Unit Select
LWLAS - Low Water Level Alarm Switch
LWTL - Low Water Temperature Light
MAN - Manual
MCB - Motor Control Breaker
MFFR - Multifunction Relay Failure Relay
MFM - Multiple Function Meter
MLC - Manual Load Control
MLP - Manual Loading Potentiometer
MLPS - Manual Loading Power Supply
MPU - Magnetic speed Pickup
MRT - Minimum Return Timer
MRTR - Minimum Return Timer Relay
MRUS - Manual Return to Utility Switch
MS - Motor Starter
NAC - Normal After Close
NC - Normally Closed
NEU - Neutral
NO - Normally Open
NRR - Normal Return Relay
OCL - Overcrank Light
OFHL - Oil Fired Heater ON Lamp
OFHS - Oil Fired Heater Switch
OCR - Overcurrent Relay
OCT - Overcrank Timer
OIU - Operator Interface Unit
ORR - Off/Reset Relay
OP - Oil Pressure
OPG - Oil Pressure Gauge
OPL - Oil Pressure Light
ORR - Off and Reset Relay
OSL - Overspeed Light
OSR - Oil Step Relay
OVR - Overvoltage Relay
P - Plug-in Connector
PAR - Utility Paralleling Relay
PCS - Parallel Control Switch
PEEC - Programmable Electronic Engine Control
PFM - Power Factor Meter
PFTD - Power Factor Transducer
PGRR - PLC Genset Run Relay
PL - Panel Illumination Light
PLBL - PLC Low Battery Lamp
PLBR - PLC Battery low Relay
PLC - Programmable Logic Controller
PLCL - PLC Running Lamp
PLCR - PLC Running Relay
PLS - Panel Light Switch
POS - Positive
POT - Potentiometer
PP - Prelube Pump
PPMS - Prelube Pump Magnetic Switch
PPPS - Prelube Pump Pressure Switch
PR - Preregulator
PS - Pinion Solenoid
PSPR - PLC Stop Relay
PSTR - PLC Start Relay
PT - Potential Transformer
PUR - Primary Unit Relay
PWM - Pulse Width Modulation
RAN - Remote Annunciator
RBCL - Remote Breaker Closed Lamp
RBL - Rupture Basin Lamp
RBOL - Remote Breaker Open Lamp
RCP - Receptacle
RCS - Remote Control Switch
RDM - Relay Driver Module
REA - Reactor
RLDL - Remote Utility Lockout Lamp
RPL - Reverse Power Light
RPM - Revolutions Per Minute
RPR - Reverse Power Relay
RPSR - Reverse Power Slave Relay
RR - Run Relay
RRT - Run Relay Timer
RRX - Run Relay Auxiliary
RSAR - Remote Start Automatic Relay
RSR - Remote System Reset Relay
RUCBR - Remote Utility Circuit Breaker Relay
RUCR - Remote Utility Close Relay
RUCT - Remote Utility Current Transformer
RUL - Return to Utility Lamp
RULOR - Remote Utility Lock Out Relay
RUTR - Remote Utility Trip Relay
SA - Surge Arrestor
SAP - Speed Adjust Potentiometer
SAR - System in Automatic Relay
SAS - Starting Aid Switch
SASV - Start Aid Solenoid Valve
SATS - Start Aid Temperature Switch
SBAR - Stand By Alarm Relay
SBR - Stand By Relay
SBS - Stand By Switch
SBST - Stand By Start Timer
SDL - Sensors Disabled Light
SDR - Shut Down Relay
SDRX - Shutdown Relay Auxiliary
SH - Spare Heater
SHTC - Circuit Breaker Shunt Trip Coil
SIG - Signal
SL - Synchronizing Light
SLDR - Shut down Lamp Driver Relay
SLM - Synchronizing Light Module
SLR - Synchronizing Light Resistor
SM - Starter Motor
SMMS - Starter Motor Magnetic Switch
SMR - Starter Motor Relay
SP - Speed Adjust Potentiometer
SPM - Synchronizing Parallel Module
SPR - Spare
SR - Slave Relay
SS - Synchronizing Switch
SSR - Synchronizer Select Relay
STPR - Stop Relay
STSR - Start Signal Relay
SYNC - Synchronizing Scope
T - Generator Line Leads
TB - Terminal Block
TBL - Tie Breaker Open Lamp
TBCL - Tie Breaker Closed Lamp
TCBR - Tie Circuit Breaker Relay
TD - Time Delay Relay
TDBC - Time Delay Breaker Close
TDBCR - Time Delay Breaker Close Relay
TDNR - Time Delay Normal Return
TDUBC - Time Delay Utility Breaker Close
THM - Thermostat
TMR - Timer
TP - Trim Potentiometer
TR - Trip Relay
TRP - Trim Potentiometer
TRT - Tarp Relay Timer
TSC - Transfer Switch Position Indicating Contact
TST - Test Signal
TTR - Tie Trip Relay
UBCL - Utility Breaker Closed Lamp
UBOL - Utility Breaker Open Lamp
UBS - Utility Breaker Select Switch
UBSR - Utility Breaker Select Relay
UCBR - Utility Circuit Breaker Relay
UCBS - Utility Circuit Breaker Switch
UCR - Utility Close Relay
UL - Underwriters Laboratories Inc.
ULOL - Utility Lock Out Lamp
ULOR - Utility Lock Out Relay
UMR - Utility Multifunction Relay
UPT - Utility Potential Transformer
USL - Utility Synchronizing Lights
USS - Utility Synchronization Switch
UTR - Utility Trip Relay
UTTL - Utility Transfer Trip Lamp
UTTR - Utility Transfer Trip Relay
UTTS - Utility Transfer Trip Switch
UVRR - Under Voltage Release Relay
UWM - Utility Watt Meter
UWTD - Utility Watt Transducer
V - AC Voltmeter
VAR - Volts Amperes Reactive
VARM - Volts Amperes Reactive Meter
VARTD - Volts Amperes Reactive Transducer
VBR - Voltage Buildup Relay
VBT - Voltage Buildup Timer
VCR - Voltage Control Relay
VDC - Volts Direct Current
VDM - Voltage Droop Module
VDR - Voltage Droop Rheostat
VM - Voltmeter
VPAP - VAR or Power Factor Adjust Potentiometer
VPC - VAR or Power Factor Controller
VR - Voltage Regulator
VRAR - Voltage Regulator Alarm Relay
VRFR - Voltage Regulator Fault Relay
VXR - Voltage Changeover Relay
WHI - Watt Hour Integrator
WHMG - Generator Watt Hour Meter
WHMU - Utility Watt Hour Meter
WLDR - Warning Lamp Driver Relay
WM - Wattmeter
WTD - Watt Transducer
WTG - Water Temperature Gauge
WTL - Water Temperature Light
XDUCER - Transducer
XVR - Change Over Relay
XVTD - Change Over Time Delay