◆ General
ZN63(VS1)indoor high-voltage alternating-current vacuum circuit breaker has a frequency of 50Hz and a rated voltage of 12kV.It applies tothe electical equipment control and protection in industrial and mining enterpises,power plants and substations,pariculanty to the places needingfrequent operation.It can be fixed in a switch cabinet or installed on a handcart.
With stable performance and convenient installation,it is the best choice for the control and protection of high-voltage power transmission
and distribution systems.
ZN63(VS1)indoor high-voltage alternating-current vacuum circuit breaker is produced in line with the following standards and codes.
●IEC 62271-100 High-voltage alternating-current circuit-breakers
●GB/T 11022-2011 Common specifications for high-voltage switchgear and controlgear standards
●GB 1984 High-voltage alternating-current circuit-breakers
● GB 311.1 Insulation co-ordination for high voltage transmission and distribution equipment
Normal operating conditions
●Ambient temperature:-40℃~+40℃ (below 35℃ within 24 hours)
● Relative humidity:≤95%(daily average)or ≤90%(monthly average)
Altitude:≤1000m
1.1 Technical parameters
| Item | Unit | Reference value |
| Rated voltage | kV | 12 |
| Power frequency voltage(when losing a circuit) | kV | Breaker 42 |
| Rated insulation level Impulse withstand voltag(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-circuic 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 | 506,380,100 |
| Required operation sequence | 0-0.3s-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 |
| item | Unit | Reference value |
| Gap of contacts | mm | 11±1 |
| Contact overtrave | mm | 3.5±0.5 |
| Average making speed | mvs | 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 | μ Q | ≤80 |
| Permissible total wear thickness of the moving/fixed contact | mm | 3 |
Overall dimension of VS1-12(wheeled)indoor high-voltage alternating-current vacuum circuit breaker(cabinet width:800mm)
Overall dimension of VS1-12(fixed)indoor high-voltage alternating-current vacuum circuit breaker(cabinet width:800mm)
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