ZW32-12 Outdoor Medium Voltage Vacuum Circuit Breaker

ZW32-12 Outdoor Medium Voltage Vacuum Circuit Breaker
ZW32-12 Outdoor Medium Voltage Vacuum Circuit Breaker
ZW32-12 Outdoor Medium Voltage Vacuum Circuit Breaker
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ZW32-12 Outdoor Medium Voltage Vacuum Circuit Breaker

ZW32-12 Outdoor Medium VoltageVacuum Circuit Breaker

The ZW32-12 outdoor medium voltage vacuum circuitbreaker has a rated voltage of 12 KV. It is a kind of three phase outdoordistribution facility for 50 Hz Power.

The featuresinclude great stability and reliability, small size, light weight and longservice life. Besides it won’t burst into fire or blast. This breaker is mainlyused for the powerdistribution network, and the load current, overload current andshort-circuit current in the electric system. It is also suitable forprotecting and controlling the power distribution system in substations,industrial and mining companies, villages, as well as places where frequentoperations are needed. Typically, our product meets the requirements for upgradingpower grid in cities and rural places.


The
ZW32-12 outdoor medium voltage vacuum circuit breaker comes with twokinds of operating mechanisms, namely spring type operating mechanism and permanentmagnetic operating mechanism.

Model name and its meaning


::

ZW 32-12/T□630(1250)-20 G

Disconnector

kARated short-circuit breaking current (kA)

ARated current (A)

D-S-Mechanismtype (D-Motor driven, S-Manual)

Operating mechanism of energystoring spring

kAMaximum working voltage (kA)

Designing series number

Outdoor vacuum circuit breaker

Working environment

1. Altitude: ≤ 3000 m

2.Ambient temperature: -45
45

3. Wind speed:
35 m/s

4. Pollution class: Class IV(according to GB/T5582-1993)

5. Installation area: No flammable,explosive or chemically corrosive substances

Table-1 Main technical parameters of circuit breaker

NO.

Item

Unit

Data

1

Rated voltage

kV

12

2

Rated frequency

Hz

50

3

Rated current

A

630,1250

4

Rated short-circuit breaking current

kA

20

5

Rated peak withstand current

kA

50

6

Rated short-time withstand current/duration

kA/S

20/4

7

Rated peak short-circuit making current

kA

50

8

Rated operating sequence

 

Opening-0.3s-closing and opening-180s-closing and opening

9

Mechanism endurance

Time

10000

10

Rated current breaking times

Time

10000

11

Rated short-circuit breaking current breaking times

Time

30

12

Power frequency withstand voltage (1 min, dry / wet, phase to phase / phase to earth and across open contacts)

kV

34 42/49

13

Lightning impulse peak withstand voltage (phase to phase / phase to earth and across open contacts)

kV

75/85

14

Secondary circuit power frequency withstand voltage (1 min)

V

2000

 

Table-2 Main technical parameters of operating mechanism

NO.

Item

Rated voltage (V)

Rated current (A)

Working condition

1

Opening coil

DC24

7

Reliable tripping: 65%-120% rated voltage
Tripping forbiddened: less than 30% rated voltage

DC110

5

DC220

3.5

AC220

1.8

2

Closing coil

DC24

7

Reliable tripping: 65%-120% rated voltage
Tripping forbiddened: less than 30% rated voltage

DC110

5

AC220

3.5

DC220

1.8

3

Over current trip coil

5

 

4

Energy storage motor

Rated voltage: DC/AC220V
Rated power: 40W

Reliable tripping:85%-110% rated voltage

5

Closed spring energy storing duration

Less than 10S

 

The graph of the circuit breaker's dimension and installation



::
The side view of the breakerwith insulated switch

1 Vacuum arc quenching room
2
Upper insulating cover
3
Lower insulating cover
4
Insulating pull rod
5
box
6
Operating mechanism
7
Drive rod
8
、、 Breaking & makingindicating board
9
Mutual inductor
10
Insulated switch
11
Current transformer

Switch
Controlling cable
Control box
Earthing cable
Installation of circuit breaker

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