Schneider Electric Class 615 UL 489 Test Procedure, Standard Specifications, Temperature

Compact® NSF and NSJ 150 to 600 A Circuit Breakers

Section 13—Supplementary Technical Information

UL 489 TEST PROCEDURE

Standard Tests For electronic trip circuit breakers and uncompensated thermal-magnetic circuit breakers rated 40° C, the test sequences are as shown in the table below:

Test		Sequence
		X	Y	Z
200%	Calibration at 25° C (77° F)	■	■	■
135%	Calibration at 25° C (77° F)	■
Calibration of Adjustable Instantaneous Trip		■
Overload		■
Tungsten Lamp Load		①
100%	Calibration at 40° C (104° F)	②
Temperature and 100% Calibration at 25° C (77° F)		■
Endurance			■
200%	Calibration at 25° C (77° F) Repeated		■
135%	Calibration at 25° C (77° F) Repeated		■
Interrupting Ability (Y sequence)			■
Interrupting Ability (Z sequence)				■
200%	Trip Out at 25° C (77° F)		■	■
Dielectric Voltage Withstand		■	■	■

①Applies only to circuit breakers rated 50 A or less, and 125 or 125/250 V or less.

②Applies only to thermal-magnetic breakers rated 40° C.

Standard

Specifications

Temperature	The temperature rise at the circuit breaker and at its terminals does not exceed specified limits when
	connected with specified cables or bus bars (see below) and at its rated current.
	Examples of specified wires and bus:
	• 75° C Copper Wire
	Rating	Number	Size
	100 A	1	#1 AWG (60° C)
		1	#3 AWG
	250 A	1	250 kcmil
	400 A	2	3/0 AWG
	600 A	2	350 kcmil
	800 A	3	300 kcmil
	1000 A	3	400 kcmil
	1200 A	4	350 kcmil

•Copper Busbar

Rating	Number	Size
1600 A	2	1/4 x 3
2000 A	2	1/4 x 4
2500 A	2	1/4 x 5
	4	1/4 x 2-1/2
3000 A	4	1/4 x4

	(1200 A or Less—1000 A / in2)
Calibration	200% calibration at 25° C—the circuit breaker must trip within time limits which depend on the rating
	from three minutes for 30 A rated circuit breakers to 30 minutes for over 2000 A rated circuit breakers.

135% calibration at 25° C—the circuit breaker must trip within two hours for circuit breakers rated more than 50 A.

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