The ZN12-24 vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 24kV and three-phase AC 50Hz. Its operating mechanism is a spring energy storage type, which can be operated by AC or DC, or manually.
This circuit breaker is a reinforced insulation type, which meets the requirements of the use environment in Class II polluted areas.
This circuit breaker has simple structure, strong breaking capacity, long life, complete operation functions, no explosion hazard, simple maintenance, suitable for control or protection switch of power plant, substation and other transmission and distribution systems, especially suitable for breaking important loads and frequently operated places.
This product complies with the GB1984-89 “AC High Voltage Circuit Breaker” standard.
1. This indoor vacuum circuit breaker is equipped with a spring energy storage type operating mechanism which can be operated by AC, DC or hand.
2. Our three-phase circuit breaker with reinforced insulation fully meets the using requirements in areas with the filthy condition reaching Grade II.
3. With characteristics of simple structure, long service life, high breaking capacity, complete operating functions, convenient maintenance, and no explosion hazard, this product is suitable to be used as the control or protection switch for power transmission and distribution systems. It is particularly suitable for breaking important loads or for occasions requiring frequent operations.
4. Our indoor vacuum circuit breaker complies with the GB1984 AC High Voltage Circuit Breaker standard.
1. Altitude: less than 1000m
2. Ambient temperature: highest +40℃, lowest -25℃
3. Relative temperature: daily average not more than 95%, monthly average not more than 90%
4. Earthquake intensity: less than 8 degrees
5. No fire, explosion hazard, no corrosive gas and no violent vibration
|
S/N
|
Item
|
Unit
|
Parameter
|
|
1
|
Rated voltage
|
kV
|
24
|
|
2
|
Rated current
|
A
|
1250 1600 2000
|
|
3
|
Rated short-circuit breaking current
|
kA
|
31.5
|
|
4
|
Dynamic stability current
|
kA
|
80
|
|
5
|
4s thermal stability current
|
kA
|
31.5
|
|
6
|
Rated short-circuit making current (peak value)
|
kA
|
80
|
|
7
|
Rated short-circuit current breaking times
|
time
|
20
|
|
8
|
Rated operating sequence
|
|
o-0.3s-co-180s-os
|
|
9
|
Lightning impulse withstand voltage (full wave)
|
kV
|
125
|
|
10
|
Rated short-time power frequency withstand voltage (1min)
|
kV
|
65
|
|
11
|
Closing time
|
s
|
≤0.09
|
|
12
|
Opening time
|
s
|
≤0.055
|
|
13
|
Full breaking time
|
s
|
≤0.09
|
|
14
|
Mechanical life
|
time
|
10000
|
|
15
|
Rated current breaking times
|
time
|
10000
|
|
16
|
Rated capacitor bank breaking current
|
A
|
630
|
|
17
|
Energy storage motor power
|
W
|
275
|
|
18
|
Rated voltage of energy storage motor
|
V
|
110 220
|
|
19
|
Energy storage time
|
s
|
≤15
|
|
20
|
Rated voltage of closing electromagnet
|
V
|
110 220
|
|
21
|
Rated current of opening electromagnet
|
V
|
110 220
|
|
22
|
Rated current of overcurrent release
|
A
|
5
|
|
23
|
Auxiliary switch rated current
|
A
|
AC 10 DC 5
|
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