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Help CenterZN28-12 ZN28A-12 Series 12KV Indoor High-voltage Vacuum Circuit Breaker Quality Choice
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ZN28-12 ZN28A-12 12KV Indoor High-voltage Vacuum Circuit Breaker
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.
Z N28A-12 (A)/630 - 20
Z: vacuum circuit breaker
N: indoor
28: design number
A: split type
12: rated voltage (Kv)
630: rated current (A)
20: rated short circuit breaking current (KA)
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.Over 20 years of manufacturing experience with good quality & stable product performance.
2. Hossin provides full line of MV-HV electrical products, including drop-out fuse, disconnector, surge arrester, vacuum circuit breaker, fuse, load switch, insulator etc.
3. Quick feedback, Timely quotation, Fast delivery
4. Complete set of testing machine to ensure product quality.
5. Hossin can customize non-standard product as per client’s requirement.
6. Hossin sells pressing parts& pressing mould at low price.
7. Hossin offers electrical installation & commission service.
To order the vacuum circuit breaker, please let us know below info:
1. Rated Voltage
2. Rated Current
3. Rated Breaking Current
4. Fixted type or Draw-out Type
Send Inquiry to This Supplier
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