Technical parameters:
Rated voltage: 12KV
Rated current: 630A
Rated Frequency: 50/60Hz
Rated power frequency withstand voltage: 42KV/1min
Rated lightning impulse withstand voltage: 75KV
Rated short-time withstand current: 20KA/4S
Rated making current: 50KA
Rated peak withstand current: 50KA
Rated transfer current: 3150A
Rated cable charging breaking current: 10A
Nominal contact pressure loop resistance: ≤ 40 micro-ohm
Mechanical life: 20000 times
Contact Closing Force: 80 ± 30N
Rated from under the contact reaction force: 120 ± 40N
Contacts allowed to wear Thickness: 3mm
Shelf life: 20 years

Mechanical vacuum switch supporting arguments:
Contact distance: 8 ± 1mm
Contact contact itinerary: 4 ± 1mm
Average opening speed (0-6mm): 1.0 ± 0.2m / s
Average closing speed (6mm-0): 0.6 ± 0.2m / s
Rated contact pressure: 800 ± 100N
Contact closing bounce time: ≤ 3ms
Different contact points closing period: ≤ 2ms
Contact bouncing amplitude: ≤ 2mm
Contact opening overshoot amplitude: ≤ 2mm

Requirements:
l, must be clamped when installing movable conductive rod connector milling flat place, to prevent twisting bellows; while moving conductive rod can not be fixed, maximum torque when mounting coupling shall not exceed 4ONM.
2, and the rest is subject to the requirements of the installation manual.