model

ZMD14-1250/10-31.5
ZMD14-1600/10-31.5

rated voltage

12KV

rated frequency

50~60Hz

rated current

1250、1600A

Rated short-circuit breaking current

31.5KA

Rated short-circuit closing current (peak)

80KA

Rated peak withstand current

80KA

Rated short-time withstand current

31.5KA

Rated short-circuit duration

4S

Rated breaking current of a single capacitor bank

630A

Rated back-to-back capacitor bank breaking current

400A

Rated short-time (1-minute) power frequency withstand voltage

42KV

Rated lightning impulse withstand voltage

75KV

Circuit resistance under rated contact pressure

≤25μΩ

Rated short-circuit breaking current breaking times

30/50 times

Rated current breaking times

10000 times

mechanical life

10000 times

Allowable wear thickness of contacts

3mm

Contact self closing force

160±60N

Contact reaction force

210±60N

Quality of the sports section

1.18kg

quality

4.1kg

Allow storage period

20a

Mechanical parameters that the matching vacuum circuit breaker should meet

contact gap

11±1mm

Contact stroke of contacts

4±1mm

Average opening speed

1.1±0.2m/s

Average closing speed

0.6±0.2m/s

Rated contact pressure

3350±320N

Contact closing bounce time

≤2ms

Contact closing and opening at different periods

≤1ms