Quick Details
Description
- Place of Origin: Zhejiang, China (Mainland)
- Brand Name: hossin
- Model Number: ZN28-12
- Type: High Voltage
- Poles Number: 3
- Rated voltage: 12KV
- Rated Current: 630A 1000A 1250A 1600A 2000A 2500A 3150A
ZN28(A)-12 series vacuum circuit breaker is an indoor high voltage switch with rated voltage 12KV, 3 phases AC 50 HZ .
This product conforms to the standard GB1984-89 .
There are two types of the main structure of circuit breaker: one is circuit breaker and operation mechanism installed into one body. The other is circuit breaker and operation mechanism installed separately. The first one is the basic type of ZN28-12; The other type(split type) is applied for various fixed switchgear cabinets, such as GG-1A(Z) , XGN2-12(Z) etc.
This product can match in use with CD17,CD10A Model DC magnetic operating mechanism or CT17 and CT19 model spring energy storage operating mechanism.
1. Altitude: ≤1000m;
2. Ambient temperature: -25°C ~+40°C ;
3. Relative humidity: daily average ≤95% , monthly average ≤90% ;
4. Earthquake intensity: 8 degree; 5. It should work in occasions without flammable and explosive matter, without corrosive chemical and frequent severe vibration.
|
NO
|
item
|
unit
|
specification
|
|
20KA
|
25KA
|
31.5KA
|
40KA
|
|
1
|
rated voltage
|
KV
|
|
12
|
|
|
|
2
|
higest working voltage
|
A
|
630.125
|
1250.16
|
1250.1600.2000.2500
|
1600.2500.3150
|
|
3
|
rated breaking current for short-circuit
|
KA
|
20
|
25
|
31.5
|
40
|
|
4
|
Rated short circuit switching current (peak)
|
KA
|
50
|
63
|
80
|
100
|
|
5
|
rated peak withstand current
|
KA
|
50
|
63
|
80
|
100
|
|
6
|
rated withstand current for short-circuit in 4 mins
|
KA
|
20
|
25
|
31.5
|
40
|
|
7
|
rated insulated level
|
frequency withstand (before and after rated breaking and closing )
|
KV
|
42(48)
|
|
impact (before and after rated breaking and closing )
|
75(84)
|
|
8
|
rated operational
|
|
breaking -0.35-closing breaking 180s-closing breaking
|
|
9
|
lifetime
|
Times
|
10000
|
|
10
|
breaking times for rated current in short-circuit
|
Times
|
30
|
20
|
|
11
|
clearance between open contacts
|
mm
|
11±1
|
|
12
|
overtravel
|
mm
|
4±1
|
|
13
|
three phaseclosing and breaking
|
ms
|
≤2
|
|
14
|
Contact switching bounce time
|
ms
|
≤2
|
|
15
|
average breaking speed
|
m/s
|
1.2±0.3
|
|
16
|
average closing speed
|
m/s
|
0.6±0.2
|
|
17
|
time for breaking
|
under highest operational volatge
|
s
|
≤60
|
|
under lowest operational volatge
|
≤80
|
|
18
|
time for closing
|
s
|
≤100
|
|
19
|
Single-phase circuit resistance
|
u Ω
|
≤45
|
≤25
|
|
20
|
Static head accumulated allow wear thickness
|
mm
|
3
|
|
21
|
The oil buffer buffer stroke
|
|
|
|
|
|
1. We are willing to customize for each new product
2. Supply all the components and accessory of High Voltage Switchgear
3. Yueqing Hossin Electrical Co., Ltd. is prosperously specialized in the production of high voltage electrical products. Our leading products include vacuum circuit-breakers, sulfur hexafluoride circuit breakers, arresters, current limiting fuses, load switches, isolators, operating mechanisms, wall drive pipes, and insulators. Our products have passed through national high voltage electrical product test held by Xi'an High Voltage Electric Research Institute. We are also a qualified enterprise entitled by "The Ministry of Power Industry".
4. Hope to have time to have a chat. TradeManager Account: wzhossin(Online chat software)
