JCZR5-7.2/D315-50 type vacuum contactor fuse combination electrical deviceDetailed product description：

The JCZR5 series AC high-voltage vacuum contactor fuse combination device has a rated voltage of 12KV/7.2KV and is an indoor device in a three-phase AC 50Hz distribution system. It can be used to control and protect high-voltage motors of 1200kW and below and transformers of 1600kVA and below in power plants, mines, metallurgy, chemical industries, and other industries. This product has a reasonable structure, high reliability, long electrical life, low maintenance, small size, light weight, and extremely long mechanical life. It is a high-performance, non maintenance combination electrical appliance that can completely replace imported products.

JCZR5-7.2/D315-50 vacuum contactor fuse combination rated parameters:

name			Numerical value
			JCZ5-7.2/D315-4	JCZR5-7.2/D315-50
rated voltage			7.2kV
Rated insulation level	1-minute power frequency withstand voltage	Alternating and relative to each other	32kV
		fracture	32kV
		Operating mechanism and auxiliary circuit	2.0kV
Lightning impulse withstand voltage (peak) phase to phase and relative to ground			60kV
rated frequency			50Hz
rated current			400A	315A
Maximum rated breaking current (25 times)			3200A
Minimum rated breaking current (25 times)			80A
Maximum breaking current (3 times)			4.0kA
Rated short-time withstand current			4.0kA
Rated short-time withstand current duration			4S
Rated short-circuit breaking current (expected value)			—	50(40)kA
Rated closing current (100 times)			4kA	—
Rated short-circuit closing current			10kA	100 (expected value) kA
Handover current			—	3150A
Half current allowed current			50(40)kA	—
main circuit resistance			≤150μΩ	≤250μΩ
electrical life	AC—3		25 × 104 times
	AC—4		10 × 104 times
mechanical life	Electricity maintenance		3.0 × 105 times
	Mechanical Maintenance		3.0 × 105 times
Number of operating cycles per hour	Electricity maintenance		300 (1800) times
	Mechanical Maintenance		300 times
Rated closing operation voltage/current			AC：220/3、110/6 V/A
			DC：220/3、110/6 V/A
Close and maintain voltage/current			AC：220/0.16、110/0.32 V/A
			DC：220/0.16、110/0.32 V/A
Rated opening operation voltage/current (only for mechanical maintenance)			AC：220/1.3、110/2.5 V/A
			DC：220/1.3、110/2.5 V/A
auxiliary switch	Connection points	Normally Open	3 (4) pieces
		normally closed	3 of them
	Rated working current	AC	4A
		DC	0.4A

Mechanical characteristic parameters of JCZR5-7.2/D315-50 vacuum contactor fuse combination device:

Interphase center distance		150±1.5mm
contact gap		4.5mm
overstroke		1.5±0.5mm
Allowable wear thickness for dynamic and static contacts		3mm
Average closing speed		0.15±0.05m/s
Average opening speed	Electricity maintenance	0.5±0.15m/s
	Mechanical Maintenance	0.5±0.15m/s
Synchronization of three-phase contact closing and opening		≤2ms
Contact closing bounce time		≤5ms
Closing time		≤150ms
Opening time		≤50ms
Note: The average closing and opening speeds refer to the average speed within the opening distance of the moving and stationary contacts, and only measure the speed value of phase B.

JCZR5-7.2/D315-50 vacuum contactor fuse combination electrical appearance diagram:

JCZR5-7.2/D315-50 vacuum contactor fuse combination device