Product overview
LW-12/24/40.5 series SF6 load breaker is used in distribution networks with rated voltage of 12/24/40.5kV and rated currents of 400A, 630A and 50/60Hz. It is used to switch on and off the load current and overload current of the system, and can automatically separate the track sections of faulty distribution lines.
The switch is matched with the electronic controller adopting new technology, and can be operated in manual, electric and remote modes. The electronic controller will be installed in a stainless steel box, so it can be used in various climatic conditions.
In addition, wired and wireless modems installed in the control box can realize remote monitoring. The installation of the switch on the pole is simple and convenient, which can reduce the construction cost.
Environmental conditions
Ambient temperature: maximum+50 C and minimum-40 C.
Altitude: ≤1000m (2000m, 3500m, 5000m as required).
Wind pressure: ≤700Pa (equivalent to wind speed of 34m/s)
Relative humidity: ≤100%
Air pollution level: Grade IV
Seismic intensity: ≤8 degrees
Free from corrosive or flammable gas pollution.
No frequent violent vibration or explosion places
Technical parameter
Name | GFLW-12 | GFLW-24 | GFLW-40.5 |
Rated voltage | 12kV | 24KV | 40.5kV |
Rted current | 630a | 630a | 630a |
Rated frequency | 50/60Hz | 50/60Hz | 50/60Hz |
hort-term withstand current | 20KA/1 | 20KA/1 | 20KA/1 |
Manufacturing and destruction ability | |||
Main active load current | 630a | 630a | 630a |
Number of load-breaking operations | 400 | 400 | 400 |
Short time current (peak value) | 50 | 50 | 50 |
Numbering | 5 | 5 | 5 |
Cable charging current | 25a | 25a | 25a |
Line charging current | 1.5a | 1.5a | 1.5a |
Closed loop circuit current | 630a | 630a | 630a |
Transformer magnetizing current
| 22a | 22a | 22a |
Power frequency withstand voltage | |||
Wet conditions -10 stages TOPHase, stage to earth, across the brain line | 45kV | 50kV | 75kV |
DryConcition-1 Mimphase Tophase，DryConcition-1 Mimphase Tophase phase, phase to earth. | 50kV | 64kV | 95kV |
Drying conditions -1 minute across the gap | 50kV | 79kV | 110kV |
Pulse compression pulse (1.2 x 50 µs) | |||
Earth stage | 85kV | 125kV | 195kV |
Span secondary | 95kV | 145kV | 215kV |
Other ratings and specifications | |||
Internal arc test | 20KA /0.1 second | 20KA /0.1 second | 20KA /0.1 second |
Arc extinction medium | SF6 | SF6 | SF6 |
Insulating medium | SF6 | SF6 | SF6 |
Creep distance (porcelain bush) | 380mm | 700mm | 1055mm |
Creep distance (silicone rubber bushing) | 540mm | 700mm | MM |
IP level | 65 | 65 | 65 |
Mechanical character | |||
Closing/opening time | ＜1sec | ＜1sec | ＜1sec |
Mechanical operation (guarantee) | 10000次 | 10000次 | 10000次 |
Operating temperature (manual type) | -25+70℃ | -25+70℃ | -25+70℃ |
Atmospheric pressure | |||
Nominal pressure (MPA at 20°C) | 0.07 | 0.07 | 0.07 |
Explosion pressure (MPA) | 0.4 ～0.6 | 0.4 ～0.6 | 0.4 ～0.6 |
Minimum air pressure (MPA) | 0.05 | 0.05 | 0.05 |
Gas leakage rate (CC/ SEC) | ≤0.5％ | ≤0.5％ | ≤0.5％ |
Outline dimension
