GE LM10 Specifications, Protection Elements, Metering, Overcurrent Ansi, Ground Fault, Stall

CHAPTER 1: INTRODUCTIONSPECIFICATIONS

1.5	Specifications
	1.5.1 Protection Elements
	OVERCURRENT (ANSI 51)
	Curve shapes:	NEMA class 10, 15, 20 and 30, hot and cold
	Timing accuracy:	±5% of total trip time + 1 second
	GROUND FAULT
	Pickup level:	0.4 to 20.0 A in steps of 0.2
	Pickup accuracy:	±5% or ±0.1 A, whichever is greater
	Time delay:	0 to 2.5 seconds in steps of 0.1
	Timing accuracy:	±200 ms
	CURRENT UNBALANCE (ANSI 46)
	Pickup level:	2 to 25% in steps of 1
	Pickup accuracy:	±5%
	Time delay:	0 to 255 seconds in steps of 1
	Timing accuracy:	±5% of total trip time + 1 second
	MECHANICAL JAM
	Pickup level:	100 to 250% in steps of 1
	Pickup Accuracy:	±5%
	Time delay:	0 to 1000 seconds in steps of 5
	Timing accuracy:	±5% of total trip time + 1 second
	STALL
	Pickup level:	330 to 600% in steps of 5
	Pickup Accuracy:	±5%
	Time delay:	0 to 30.0 seconds in steps of 0.5
	Timing accuracy:	±5% of total trip time + 1 second
	LOAD LOSS
	Pickup level:	15 to 100% in steps of 1
	Pickup Accuracy:	±5%
	Time delay:	0 to 255 seconds in steps of 1
	Timing accuracy:	±5% of total trip time + 1 second

UNDERVOLTAGE/OVERVOLTAGE

Undervoltage pickup level: 80% of nominal voltage (96 V)

Overvoltage pickup level: 117% of nominal voltage (140 V)

Pickup accuracy:	±5%
Trip time:	0.5 second
Timing accuracy:	±200 ms

1.5.2Metering

PHASE CURRENT

Resolution:	0.1 A
Range:	0.05 to 8 × CT Primary (3200.0 A max.)
Accuracy:	±5% of full scale

LM10 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 1–7