Vacuum Interrupter TF 12kv 630A 20KA (JUC702) for load break switch use from JUCRO Electric

Items

Value

Rated voltage

12KV

Rated current

630A

Rated frequency

50Hz

Rated power frequency withstand voltage(1 min)

42kV

Rated lightning impulse withstand voltage

75kV

Rated short time withstand current

20KA

Rated withstand current(peak value)

50KA

Rated short circuit making current(peak value)

50KA

Rated closed-loop breaking current

630A

Rated active load breaking current

630A

Rated cable charging breaking current

10A

Rated duration of short circuit

4s

Mechanical life

10000 times

Closing force due to bellows and atmosphere

70±20N

Force required to hold contacts opening at full stroke

120±30N

Circuit resistance at minimum contacts force

≤40μΩ

Storage life

20 years

Limiting abrasion of contacts

3mm

Items

Value

Clearance between opening contacts

6±1mm

Average opening speed(Contacts closing position~75% contacts opening distance)

1.0±0.2 m/s

Average closing speed(30% contacts opening distance~contacts closing position)

0.6±0.2 m/s

Rated contacts pressure

900±100N

Contacts bouncing duration at closing operation

≤2ms

Contacts re-bouncing clearance at opening operation

≤2mm

Synchronism of three phases

≤1ms