Schneider Electric Class 615 Indications, Test, Unit or other accessories, Setting Example

Compact® NSF and NSJ 150 to 600 A Circuit Breakers

Section 4—Trip Units

Indications Load indication (LED) in front (6):

•Lights solid at 90% of Ir threshold

•Flashes at >105% or greater of Ir threshold

Test	Test connector in front (7) for connection to test kit to check circuit breaker operation after fitting the trip
	unit or other accessories.
Setting Example	Question: What is the overload protection threshold of a Compact NSJ400 circuit breaker equipped
	with trip unit STR23SP where Io = 0.5 and Ir = 0.8?

Answer: In x Io x Ir = 400 x 0.5 x 0.8 = 160 A

The same trip unit with the same settings, mounted on an NSJ600 circuit breaker will have the following tripping threshold: In x Io x Ir = 600 x 0.5 x 0.8 = 240 A.

06153066	Io	.9			Ir
	.8			.9	.93
	.7	1	.88		.95
	.63		.85		.98
	.5		.8		1
	x In			x Io
	400 x 0.5 x 0.8 = 160 A

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