Column Switch Series
Home　>　Products　>　Medium-voltage Switchgears　>　Column Switch Series　>　Details
Product Center
Product inquiry
Please enter the name of the product to query

+86-0431-84158222

+86-0431-84155885

ZW20A-12 Outdoor User Boundary Vacuum Circuit Breaker
Column Switch Series
ZW20A-12 Outdoor User Boundary Vacuum Circuit Breaker is suitable for power lines with three-phase AC 50Hz, 12Kv And below for opening and closing line load current, overload current and breaking short-circuit current.
ZW20A-12 Outdoor User Boundary Vacuum Circuit Breaker is suitable for power lines with three-phase AC 50Hz, 12Kv And below for opening and closing line load current, overload current and breaking short-circuit current. This product is widely used in urban and rural grids (in particular places with frequent operation) as 10kV distribution line section, control and protection and can be combined with relevant intelligent remote terminal to meet the demand of distribution application. This circuit breaker has excellent breaking performance, good electric properties, high reliability and long-term maintenance-free property.


S/N

Rated parameters

Unit

Parameters

1

Rated voltage

kV

12

2

Rated frequency 

Hz

50/60

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

Power frequency voltage (1min) (phase-to-ground, phase-to-phase and phase-to-fracture)

kV

42/48 (dry type), 34(wet type)

12

Rated line-charging breaking current

A

10

13

Rated short circuit current breaking times

Time

30

14

Mechanical life

Time

10000

15

Resistance of contact circuit of each phase

μΩ

cable output ≤600, bushing output ≤200

16

Clearance between open contacts

mm

8±1

17

Over-travel of the contact

mm

2.5~4

18

Contact closing bounce time

ms

≤10

19

Clearance between isolating fractures

mm

25~30

20

Overtravel of isolating fracture

mm

1.2±0.2

21

Three-phase closing/opening non-synchronism

ms

≤3

22

Opening time

ms

<300

23

Sulfur hexafluoride gas rated pressure

MPa

“0”

24

Enclosure protection class

IP67

1. Vacuum arc extinguish, SF6 gas insulation, excellent breaking performance.

 

2. Oil-free, fully sealed, non-segregated, explosion-proof, moisture-proof and condensation-proof structure design, long-term maintenance-free property.
 
3. High class, fully sealed air plug design, highly reliable distribution automation interface.
 
4. Reasonable structural design, flexible motor and manual operation, seat type or lift type installation for convenient selection.