ZW□-12 Outdoor high-voltage Vacuum Circuit Breaker
ZW□-12 box-type outdoor vacuum circuit breaker is the outdoor high-voltage vacuum breaker with rated voltage of 12kV,three-phase,AC 50Hz.It is mainly used for interrupting and closing the load current,overload current and short circuit current in electric system.The product is mainly used in urban,agricultural,substation and industrial and mining enterprises distribution system.
Information and materials

1. Overview

ZW□-12 box-type outdoor vacuum circuit breaker is the outdoor high-voltage vacuum breaker with rated voltage of    12kV, three-phase, AC 50Hz. It is mainly used for interrupting and closing the load current, overload current and    short circuit current in electric system. The product is mainly used in urban, agricultural, substation and    industrial and mining enterprises distribution system.

2. Structural characteristics

◇ flexible operation, convenient: The new design of small hand-electric integrated spring mechanism, with functions    of automatic storage, switch closing, opening driven by electricity, while such functions can also be realized    manually.

◇ Reliable Sealing Performance: the use of mature sealing structure technology to ensure good air impermeability.

◇ Excellent insulation performance: the outgoing bushing is synthesized by APG process, with sufficient insulation    distance and safe operation.

◇ Maintenance-free: The main circuit and secondary components are sealed by SF6 (0 gauge pressure), and unaffected    by the external environment.

Main technical parameters

Number

          name

Unit

Parameters

1

Rated voltage

kV

12

2

Rated

Insulation

Level

1minRated power frequency withstand voltage

42(alternating and relative to the ground) / 48(fracture and isolation fracture)

Rated lightning impulse withstand voltage (peak value)

Alternating and facing the ground

75

Fracture surface

85

3

Rated current

A

630

4

Rated short-circuit breaking current

kA

20/25

5

Rated short-circuit closing current (peak value)

50/63

6

Rated dynamic stability current (peak value)

50/63

7

Rated thermal stability current (effective value)

20/25

8

Rated short-circuit breaking current frequency

time

30

9

Rated thermal stabilization time

s

4

10

The secondary circuit has a 1-minute power frequency withstand voltage

kV

2

11

Mechanical life

time

10000

12

Weight

kg

160

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400-157-0776