ZW8-12, ZW8-12G series high-voltage vacuum circuit breaker is a kind of outdoor high-voltage switch equipment with 50Hz three-phase alternating current 12Kv rated voltage. It mainly apply to break and close the load current, overload and short-circuit in country power net, city power net and minitype power system. The general framework of this product is adopted the form of three-phase using same box, i. E. Put the three-phase arc-extinguishing chamber inside of the metal box. For the SMG material has the advantage of space insulation and grounding insulation, the breaker has perfect performance and high insulation strength.
ZW8-12G is composed of ZW8-12 breaker and disconnecting link that we called combination breaker. It can be used as sectional switch.
These series products have the operation framework of CT23 type power storage with spring, which can divide into eletromotion type and manual type.

Technical parmeter

Sequence number Item Unit Data
6.3KA 12.5KA 20KA
1 Rated voltage KV 12
2 Rated current A 630
3 Rated short-circuit break and close current KA 6.3
12.5
20
4 Rated short-circuit close current(peak value) KA 16 31.5 50
5 Rated peak value withstand current KA 16 31.5 50
6 Rated little 1min withstand current KA 6.3 12.5 20
7 Rated insulation 1evel Industrial frequency withstand voltage(dry) KV 42
Thunder impulse withstand voltage(peak value) 75
8 Tated operation the order Off-0.3S-on and off-180S-on and off
9 Mechanical life-span times 10000
10 Rated short-circuit current break and close time times 30
11 Speak and move organization amount assign the current of the floodgate V 110, 220
12 Speak and move organization amount assign the current of the floodgate V 110, 220
13 Switching distance of the contact mm 11+_1
14 Uitra journey(touches the head spring and compress length) mm 3 +1.0
-0.3

15 three-phase breaking into\shut folldgate sex of the same period ms ¡Ü2
16 Touch the head and shut a floodgate of time of bouncing ms ¡Ü2
17 Average speed of breaking brake m/s 1.0+_0.2
18 Average speed of closing brake m/s 0.7+_0.15
19 Time of breaking brake Operate it under the voltage highest s 0.015-0.05
Operate it under the voltage the mostlow 0.03-0.06
20 Time of closing brake s 0.025-0.05
21 Each the resistance of main reture circuit ¦Ì¦¸ ¡Ü120
22 Allowance abrasion cumulated thickness of the moving and stationary contact mm 3