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
|