Home > Products > Electronics & Electricity > Switch > Other Switches

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

Rated voltage: 12 KV

Rated current: 1250A

Rated power frequency withstand voltage (1 min): 42 KV

Rated lightning impulse withstand voltage: 75 KV

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: 4 s

Mechanical life: 20,000 times

Closing force due to bellows and atmosphere: 70±40 N

Force required to hold contacts opening at full stroke: 120±50 N

Circuit resistance at lowest rated contacts force: ≤35μΩ

Storage life: 20 years

Limiting abrasion of contacts: 3 mm

Weight of moveable parts: ≤0.7kg

Mechanical requiements of vacuum circuit breaker

Clearance between opening contacts: 7±1 mm

Average opening speed: 1.0±0.25 m/s

Average closing speed: 0.65±0.15 m/s

Rated contacts pressure: 1600±100 N

Contacts bouncing duration at closing operation: ≤2 ms

Contacts re-bouncing clearance at opening operation: ≤2 mm

Synchronism of three phases: ≤1 ms