Model Number

ZW10 ZKTD630/12-20(VTD3142KH)

Main technical data

rated voltage
12kV

rated current
630A

rated frequency
50Hz

rated short-time power frequency withstand voltage
42kV

rated lightring impulse withstand voltage
75kV

rated short-circuit breaking current
12.5/16/20KA

rated short-circuit making current
31.5/40/50kA

rated operations of short-circuit breaking current interruption
30 times

rated single capacitor bank breaking current
400A

rated short-time withstand current
12.5/16/20KA

rated peak withstand current
31.5/40/50kA

rated duration of short-circuit
4s

mechanical life
10000times

contact closing force due to bellows and atmosphere
70±40N

counterforce at rated contact stroke
120±50N

circuit resistance at rated contact force
≤25μΩ
shelf life
20years

contact erosion limit
3mm

weight of moving parts
≤0.7kg

mechanical data required for matched vacuum switchgear

rated contact stroke
9±1mm

average opening speed
1.0±0.25m/

average closing speed
0.65±0.15m/s

added contact force
900/1300/1600±100N

contact bouncing duration at closing operation
≤2ms

contact bouncing bank amplitude of opening operation
≤2mm

three-pole simultaneity
≤1ms