Products
ZN23 40.5kv 50hz 1250a long life indoor high voltage electrical vacuum circuit
Functional features

Zn23-40.5 circuit breaker is an indoor device with three-phase ac 50Hz and rated voltage of 40.5kv.

 

The mechanism of the circuit breaker and arc extinguishing chamber system is designed as one, the special Siemens 3AF type spring operating mechanism.Dual - purpose motor is used for ac and dc energy storage operation.It can also be done manually.

 

This product design has: 350mm, 400mm, 460mm and other phase distance, and it is more convenient to use with different types of switchgear.

 

It can be used in fixed cabinet xgn17-40.5, kyn10-40.5 and jyn1-40.5.

1. Prodcut Overview

1.1.Application: for the control and protection of substation and equipments; making and breaking short-circuit current under various operating status of electric network. It matches with matched Indoor Type Vacuum Circuit Breaker ZN12-40.5, ZN23-40.5 .

1.2.Standards: IEC 62271-100

1.3.Parameters: Rated voltage: 40.5kV.  
                               Rated current:  2000A .

                               Rated frequence:AC50HZ.

 

2.Overall dimensions

3.Description

Zn23-40.5 vacuum circuit breaker is rated voltage 40.5kA, three-phase ac 50Hz indoor high voltage electrical equipment.It is suitable for control and protection switch of power transmission and distribution system in industrial and mining enterprises and substations, especially for metallurgy, electric arc furnace and other industries that need frequent operation.As a control and protection device.

 

This product conforms to the standard of gb1984-2003 "ac high-voltage circuit breaker", the circuit breaker can be directly pushed into the gbc-40.5 cabinet, jyn1-40.5 cabinet, and can be installed and used independently without plug.

Technical parameters

 

Item

Unit

data

Rated voltage

 

KV

40.5

Lightning shock withstand voltage (peak))

KV

185

Power frequency withstand voltage for 1min

 

KV

95

Rated frequency

 

HZ

50

Rated current

 

A

1250

1600

2000

Rated short circuit breaking current

 

KA

20

25

31.5

Rated short circuit withstand current

 

KA

20

25

31.5

Rated peak tolerance time

 

KA

50

63

80

Rated short circuit duration

 

S

4

Rated short-circuit closing current

 

KA

50

63

80

Rated operation sequence

 

 

c-0.3S-c+o-180s-c+o

Closing time

MS

≤75

Open time

MS

≤60

Rated number of short circuit breaking current

 

Time

30

20

Mechanical life

 

time

10000

Contactor trip

 

Mm

25±2

Contact overtravel

 

Mm

6±2

Closing speed

 

m/s

1.4±0.3

Break-brake speed

 

m/s

1.6±0.3

Contact closing bounce time

 

ms

≤3

Interphase center distance

 

Mm

350±2/400±2,460±2

The three-phase contact switching circuit is particularly cyclical

 

Ms

≤2

Resistance per phase loop

 

µΩ

≤50

 

 

 

ZN23-40.5 2.jpg

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Item

Unit

data

Rated voltage

KV

40.5

Lightning shock withstand voltage (peak)

KV

185

Power frequency withstand voltage for 1min

KV

95

Rated frequency

HZ

50

Rated current

A

1250

1600

2000

Rated short circuit breaking current

KA

20

25

31.5

Rated short circuit withstand current

KA

20

25

31.5

Rated peak tolerance time

KA

50

63

80

Rated short circuit duration

S

4

Rated short-circuit closing current

KA

50

63

80

Rated operation sequence

 

c-0.3S-c+o-180s-c+o

Closing time

MS

≤75

Open time

MS

≤60

Rated number of short circuit breaking current

Time

30

20

Mechanical life

time

10000

Contactor trip

Mm

25±2

Contact overtravel

Mm

6± 2

Closing speed

m/s

1.4±0.3

Break-brake speed

m/s

1.6±0.3

Contact closing bounce time

ms

≤3

Interphase center distance

Mm

350±2/400±2460±2

The three-phase contact switching circuit is particularly cyclical

Ms

≤2

Resistance per phase loop

µΩ

≤50

 

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