11kV SF6 Load Break Switch
11KV sf6 load break switch refers to international new technology and develops the switching equipment according to the relevant standards in China’s electric power system.
Its performance indicators in full compliance IEC420,694,129 and national standards GB3804-2004“3.6kV-0.5kV high voltage AC load breaker switch” GB1985-2004“high-voltage AC isolation switch and earthing switch”, GB/ T11022-1999“ common technical requirements for high-voltage switchgear and control equipment standards“, This is the main switching element RMU.
The load breaker switch is a collection of multifunctional medium voltage switchgear of gates,sub-gate, earthing. In a fully sealed with strengthening the structure of the epoxy resin housing to filled with SF6 gas,0.05MPa, with the minimum parts to achieve the above three functions, to ensure product quality, improve reliability, maintenance-free. It can be safely run for more than 20 years in normal conditions.
- 11KV SF6 Load Break Switch Features
- Datasheet
- 11kv sft load break switch drawing
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1.Load breaker switch adapts double fracture, rotary movable contact structure, with the following three kinds of operating states: Closing, opening, earthing.
2.Using SF6 gas as an arc extinguishing and insulating medium, the main circuit seals by the upper and lower housing pouring epoxy resin.
The conductive function is unaffected by external influences.
3.Good safety performance. If internal arcing occurs, the housing has an internal structure weak point, it will be rushed to open, followed by the cabinet above the shutter release arc red open-air overpressure stream-oriented outside the cabinet, ensure that the switch cabinet security checks.
4.Load breaker switch sets gates, opening, earthing switch three at once, filled with SF6 gas encapsulated in epoxy resin housing, three-position interlock, compact structure, high security, and reliability.
5.small size, lightweight, maintenance-free, easy, and safe to operate.
Normal working Environment
- Altitude: ≤1000m
- The ambient temperature at -30℃ to +40℃, the daily average temperature should not more than 30℃.
- The daily average of relative humidity is less than 95%, the average monthly is less than 90%.
- The working environment should be without steam, gas, chemical corrosive deposition, salt fog, dust, dirt, and other dangerous explosive media, which will severely impact on insulation and conductivity of products.
- The working environment should not be regular vibration or serious bumps.
| Item | Unit | Data | |
| Rated voltage | KV | 12 | |
| Rated frequency | Hz | 50 | |
| Rated current | A | 630 | |
| Rated peak withstand current | KA | 50 | |
| 4s rated short-time withstand current | KA | 20 | |
| Rated making current | KA | 50 | |
| Rated breaking current | Active load breaking current | 630 | |
| Breaking current loop | A | 630 | |
| Cable charging breaking current | A | 10 | |
| 1min power frequency withstand voltage (phase to phase, to earth, fracture) | KV | 42/48 | |
| Lightning impulse withstand voltage (phase to phase, to earth, fracture) | KV | 75/85 | |
| Relative pressure of SF6 gas (20℃ GP) | MPa | ≤0.04 | |
| Rated operating voltage (electric) | V | AC220,DC220 | |
| Rated voltage of shunt release | V | AC220,DC221 | |
| Average opening speed | M/S | 3.5±1.5 | |
| Average closing speed | M/S | 3.5±1.6 | |
| Three-phase points, dosing phase of the same | ms | ≤3 | |
| The main circuit resistance | μΩ | ≤120 | |
| Manual maximum torque | N.m | ≤160 | |
| Phase to phase center distance | mm | 210±0.5 | |
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