NSX250-3 Moulded Case Circuit Breaker

The design of USX series molded case circuit breakers reflects the latest current limiting principle and manufacturing technology. it has the characteristics of compact structure, full modularization, high breaking and zero flying arc. its rated insulation voltage is 750v, suitable for AC 50Hz, rated working voltage 690v, rated working current to 1250A circuit for infrequent conversion and motor infrequent start. The circuit breaker has overload, short circuit and undervoltage protection devices, which can protect the line and power equipment from damage. The circuit breaker complies with ICE60947-1 and 1CE60947-2 implementation standards.

Download PDF

Get a Quote

Technical Parameters

Product Description
Standard Certifications		IEC60947	GB 14048
Item No.		USX250
Number of poles		1	3	4
Electrical characteristics as per IEC60947-2 and EN60947-2
Rated current(A)	In	200-225-250
Rated Operating Voltage(V)	Ue	400v
Rated Insulated Voltage (Ui)	Ui	800
Rated impulse withstand voltage(kV)	Uimp	8kV
Types of Circuit Breakers		F	N	H
Ultimate breaking capacity (kA rms Icu）	220/240	85	90	100
	380/415	36	50	70
	440	35	50	65
	500	25	36	50
	525	22	35	35
	660/690	8	10	10
Rated service breaking capacity (kA rms Icu) 100%		100%
Utilization category		A
Mechanical Parameters	Mechanical	7000
	Electrical	1000
Protection
Overload protection	Bimetal	○
Instantaneous protection	Magnetic	○
Auxiliaries
Indication contacts	AX	○
	AL	○
	AXAL	○
Voltage releases	SHT	○
	UVR	○
Control	Manual	with toggle with direct or extended rotary handle

Dimensions(mm)		160X35X120	160X105X120	160X140X120