Parameter item

Unit

Value

Rated voltage

KV

12

Rated current

A

1600

Rated frequency

Hz

50

Rated short-circuit breaking current

KA

50

Breaking times of short-circuit current

Time

30

Rated short-circuit making current

KA

125

Rated peak withstanding current

KA

125

Rated short-time withstanding current (4 seconds)

KA

50

Rated single capacitor bank breaking current

A

630

Rated back-to-back capacitor breaking current

A

400

Short-time power-frequency withstanding voltage

KV

48

lighting impulses withstanding voltage (peak)

KV

85

Circuit resistance at rated contact force

μΩ

≤20

Mechanical life

Time

20000

Contact closing force due to bellows and atmosphere

N

250±60

Counterforce at rated contact stroke

N

340±60

Contact erosion permission length

Mm

3

Shelf life

Year

20

Part discharge

pC

≤5

Rated operating sequence

0-0.3s-C0-180s-C0

 Mechanical parameters of vacuum switch

Rated contact gap

Mm

9±1

Contact connection gap

Mm

4±1

Average breaking speed

m/s

1.4±0.2

Average closing speed

m/s

0.8±0.2

Rated operation pressure of contact

N

6700±300

Bounce duration of contact closing

Ms

≤2

Out of simultaneity of contact closing and opening

Ms

≤1

Rebound amplitude of breaking contact

mm

≤2