Vacuum interrupter JTD-12KV 1250A 20KA for vacuum circuit breaker VCB from JUCRO Electric

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Hubei Jucro Electric Co.,Ltd

Vacuum interrupter JTD 12KV 1250A 20KA for vacuum circuit breaker VCB from JUCRO Electric

Categories	Vacuum Interrupter
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Brand	JUCRO
Model	JTD 12KV 1250A 20KA
Unit Price	US $ 79 / piece
FOB port	Shanghai/Ningbo
Terms of Payment	L/C, Western Union, MoneyGram, T/T
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Update Time	2019-02-21

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Detail Information

Vacuum interrupter JTD 12KV 1250A 20KA for vacuum circuit breaker VCB from JUCRO Electric

Vacuum Interrupters accept customized order according to technical drawing or samples.

The vacuum interrupter use the wave ceramic as insulating shell, the contact material is CuCr alloy, the longitudinal magnetic field cup structure, with high breaking capacity, high insulation level, strong arc extinguishing ability, long life, small size and easy maintenance, No explosion risk, no pollution, low noise and so on.

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Main technical parameters

Items	Value
Rated voltage	12kV
Rated current	1250A
Rated frequency	50Hz
Rated power frequency withstand voltage (1 min)	42kV
Rated lightning impulse withstand voltage	75kV
Rated short circuit breaking current	20KA
Rated short circuit making current(peak value)	50KA
Breaking operations under rated short circuit breaking current	30 times
Rated short time withstand current	20kA
Rated withstand current(peak value)	50kA
Rated duration of short circuit	4s
Mechanical life	20000 times
Closing force due to bellows and atmosphere	70±40N
Force required to hold contacts opening at full stroke	120±50N
Circuit resistance at lowest rated contacts force	≤35μΩ
Storage life	20 years
Limiting abrasion of contacts	3mm
Weight of moveable parts	≤0.7kg

Mechanical requiements of vacuum circuit breaker

Items	Value
Clearance between opening contacts	7±1mm
Average opening speed	1.0±0.25 m/s
Average closing speed	0.65±0.15 m/s
Rated contacts pressure	1600±100N
Contacts bouncing duration at closing operation	≤2ms
Contacts re-bouncing clearance at opening operation	≤2mm
Synchronism of three phases	≤1ms

Packing & Delivery

Strong package, Safety first.

Inside with foam to support the product, put it in carton or wooden box, fixed it on pallet.

As long as possible to keep the products safe until it arriving customer's warehouse.

Clearly marking label outside of package, customers will be easy to identify their goods.

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