Indoor Circuit Breakers
Electrical 12kv High Voltage Indoor Vacuum Circuit Breaker
description
Technical Parameter
|
Item |
Unit |
Reference value |
|
|
Rated voltage |
kV |
12 |
|
|
Rated insulation level |
Power frequency voltage (when losing a circuit) |
kV |
Breaker 42 |
|
Impulse withstand voltage (when losing a circuit) |
kV |
Breaker 75 |
|
|
Rated frequency |
Hz |
50/60 |
|
|
Rated current |
A |
630/1250/1600/2000/2500/3150/4000 |
|
|
Rated short-circuit breaking current |
KA |
20,25,31.5,40 |
|
|
Rated short-circuit making current (peak value) |
KA |
50,63,80,100 |
|
|
Rated short-time withstand current |
KA |
20,25,31.5,40 |
|
|
Rated withstand current (peak value) |
KA |
50,63,80,100 |
|
|
Required operation sequence |
|
O-0.3s-CO-180s-CO |
|
|
Rated short-circuit duration |
s |
4 |
|
|
Times of making-breaking with the rated short-circuit current |
Times |
30 |
|
|
Mechanical life |
Times |
10000 |
|
|
Weight |
kg |
110 |
|
Mechanical parameters
|
Item |
Unit |
Reference value |
|
Gap of contacts |
mm |
11±1 |
|
Contact overtravel |
mm |
3.5±0.5 |
|
Average making speed |
m/s |
0.6±0.2 |
|
Average breaking speed |
m/s |
1.1±0.2 |
|
Bounce time in contact making |
ms |
≤2 |
|
Non-synchronous making/breaking of contact |
ms |
≤2 ≤3(40kA) |
|
Resistance of the circuit of each phase |
μΩ |
≤80 |
|
Permissible total wear thickness of the moving/fixed contact |
mm |
3 |
product description
|
Product standards |
1.IEC 62271-100 High-voltage alternating-current circuit-breakers 2.GB/T 11022-2011 Common specifications for high-voltage switchgear and controlgear standards 3.GB 1984 High-voltage alternating-current circuit-breakers 4.GB311.1 Insulation co-ordination for high voltage transmission and distribution equipment |
|
Ambient condition |
1. Altitude:≤1000m; 2. Ambient temperature: - 40℃-+40℃ (below 35C within 24 hours) 3.Relative humidity: ≤95% (daily average) or≤90% (monthly average) |