NHH3250T52X15
High Instantaneous Circuit Breaker for Selective Coordination

Number of Poles	Amperes	Trip Unit
3	250	Electronic LSI

LHH and NHH Electrical Characteristics

NHH3250T52X15 Short-Circuit
Current Ratings (kA rms) AC 50–60 Hz

Description		Breaker Type
		LHH	NHH
Max. rated current (amperes)		400	350
NEMA UL 489	240 Vac	100	100
	480 Vac	65	65
	600 Vac	35	35
	250 Vac	42	—
IEC 60947-2	220 Vac	100	100
	415 Vac	70	70
	690 Vac	25	25
	125/250 Vdc	22	—
Number of poles		3	3
Ampere range		125–400A	150–350A

Continuous Current Ratings

Continuous Current Rating (Ir)	Magnetic Trip Point	Continuous Current Multiplier	Instantaneous Trip Point	Continuous Current Multiplier	Short Delay Pickup
125A	2500A	20x	—	—	—
150A	2500A	16x	14,000A	93x	225–1200A
175A	4000A	22x	14,000A	80x	260–1400A
200A	4000A	20x	14,000A	70x	300–1600A
225A	6000A	26x	14,000A	62x	338–1800A
250A	6000A	24x	14,000A	56x	375–2000A
300A	6000A	20x	14,000A	47x	450–2400A
350A	6000A	17x	14,000A	40x	525–2800A
400A	6000A	15x	—	—	—

Dimensions

Description	Height	Width	Depth	Weight in Lbs (kg)
LHH	10.13 (257.3)	5.48 (139.2)	4.09 (103.9)	12.36 (5.6)
NHH	16.00 (406.4)	8.25 (209.5)	5.50 (139.7)	46.80 (21.2)