Schneider Electric Class 615 Trip Units for Compact NSJ400-NSJ600 Circuit Breakers, STR53UP

Compact® NSF and NSJ 150 to 600 A Circuit Breakers

Section 13—Supplementary Technical Information

TRIP UNITS FOR COMPACT® NSJ400–NSJ600 CIRCUIT BREAKERS

STR23SP

06153218	10 000
			5 000
			2 000
					Ir	=	0.4	–1 x In
			1 000
			500
			200
			100
			50
			20
			10
			5
		t(s)	2
										Im	=	2–9 x				Ir
			1
			.5
			.2
			.1
			.05
			.02
												Reflex Tripping:
			.01
														t < 10 ms
			.005
			.002							I =		11	x		In
			.001
			.5 .7 1	2 3 4 5 7 10					20 30 50 70100 200 300

I / Ir

06153219

STR53UP

10000

5 000

2 000	Ir = 0.4–1 x In	For Hot Start (0.9 x Ir) Divide
1 000
	tr = 1–8 s (6 Ir)	Max. Time by 2, Min. Time by 4
500
200
100
50
	Isd = 1.5

20I2t = ON

5

t(s)	2
				Isd = 1.5–7 x Ir
	1
	.5
		Isd = 1.5
	.2	I2t = OFF
				Tsd = 0–0.3 s
	.1
	.05
	.02
					Reflex Tripping:
	.01
						t < 10 ms
	.005
	.002	Ii = 1.5–9 x in
	.001
	.5 .7 1		2 3 4 5 7 10	20 30 50 70100 200 30

I / Ir

STR53UP Ground-fault Protection

06153220	10 000
		5 000
		2 000						Ig = 0.2–1 x In
		1 000
		500
		200
		100
		50
		20
		10		I2t ON
		5
	t(s)	2
		1
		.5					0.4
		.2					0.3
							0.2
		.1	I2t OFF				0.1
		.05
		.02
		.01
		.005
		.002
		.001
		.05 .07 .1	.2	.3 .4 .5	.7	1	2	3	5	7	10	20	30
						I / In

Reflex Tripping: See Page 62

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