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JTD 12kv 1250A 20KA Ѵҧ٭ҡ vacuum interrupter for Solid embedded poles


Թ :    JTD 12kv 1250A 20KA Ѵҧ٭ҡ vacuum interrupter for Solid embedded poles
觫 (Order Code) :    TTN00-09445
(Model) :    12kv 1250A 20KA Ѵҧ٭ҡ
(Brand) :    Jucro

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Model No.: JTD 12kv 1250A 20KA vacuum interrupter for Solid embedded poles

 

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
 

 



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