Column Switch Series
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ZW32－12/630 Outdoor AC HV Vacuum Circuit Breaker
Column Switch Series
ZW32－12/630 Outdoor AC HV Vacuum Circuit Breaker is an outdoor column device for three-phase AC 50Hz and rated voltage of 12Kv and is mainly used for breaking and closing load current, overload current and short-circuit current in power system.
ZW32－12/630 Outdoor AC HV Vacuum Circuit Breaker is an outdoor column device for three-phase AC 50Hz and rated voltage of 12Kv and is mainly used for breaking and closing load current, overload current and short-circuit current in power system. It is applicable in substations and distribution systems of industrial and mining enterprises for protection and control as well as rural grid where frequent operation is required. It can also be used as a section switch for grid and when installed with a controller, it can realize distribution network automation.

S/N

Item

Unit

Parameters

1

Rated voltage

kV

12

2

Rated frequency 

Hz

50

3

Rated current

A

630

4

Rated short-time withstand current

kA

20

5

Rated peak withstand current

kA

50

6

Rated duration of short-circuit

s

4

7

Rated short-circuit open current 

kA

20

8

Rated short-circuit closing current (peak)

kA

50

9

Rated operation sequence

O-0.3s-CO-180s-CO

10

Rated active load breaking current

A

630

11

Dc component of rated short-circuit breaking current

≮40%

11

Rated short-time power frequency voltage (1min) withstand voltage (phase-to-ground, phase-to-phase and phase-to-fracture)

kV

42

12

Rated lightning impulse withstand voltage (peak)

phase-to-ground, phase-to-phase and phase-to-vacuum fracture)

kV

75

13

auxiliary circuit 1min power frequency withstand voltage

kV

2

Earth fault breaking current between different phase

kA    

14

Rated line-charging breaking current

A

10

15

Rated short circuit current breaking times

Time

30

16

Mechanical life

Time

10000

18

Clearance between open contacts

mm

9±1

19

Over-travel of the contact

mm

2.5~4

20

Contact closing bounce time

ms

≤2

23

Three-phase closing/opening non-synchronism

ms

≤3

24

Opening speed

m/s

1.2±0.2

25

Closing speed

m/s

0.6+0.2

26

Insulating medium

Re-closing and air insulation

Weight (without isolation)

kg

74

1. This product adopts integrated structure design and the three-phase posts linked with electrical part and operating structural box respectively to form a unified whole, stable and reliable breaking performance, free of combustion and explosion hazard, maintenance-free, small in size, light weight and long service life.

 

2. Vacuum arc extinguishing chamber uses full-closed embedded structure, moisuture-proof and condensation-proof, applicable for hot and humid places.
 
3. Three-phase post and current transformer is cast by outdoor epoxy resin or silicone rubber, high insulation performance with advantages of high and low temperature resistance, UV resistance, weathering resistance, etc.
 
4. The operating mechanism uses small spring operation mechanism and the mechanical transmission uses direct-acting transmission mode with less parts, low loss in opening and losing and high reliability. The operating mechanism is embedded in the sealed mechanism box, solving the problem of corrosion and improving the reliability of the mechanism.
 
5. Opening and closing operation of the circuit breaker can be done in manual, motor or remote manner. It can be combined with a controller to realize distribution automation.