FKW18-12OUTDOOR AC HIGH VOLTAGE LOAD SWITCHES
Product Overview
FKW18 series of switches is a new type of load switch designed and manufactured by integrating the mature experience of domestic existing load switch production and foreign advanced technology.
The isolation load switch is composed of isolation knife, arc extinguishing chamber and operating mechanism. It adopts the principle of compressed gas generation and arc extinguishing, which has the advantages of simple structure, low maintenance, strong arc extinguishing ability, high fracture insulation level, and high reliability, reaching the level of similar foreign products.
This switch is suitable for outdoor three -phase AC power distribution system with rated voltage below 12kV and rated frequency of 50Hz to suit the load current. In the open position, it can meet the isolation requirements specified for the disconnecting switch.
Working Environment
1.The altitude does not exceed 3000 meters;
2. Ambient air temperature: upper limit +40℃ , lower limit -40℃ , daily temperature difference does not exceed 32K;
3. The wind pressure does not exceed 700Pa. (equivalent to the wind speed of 34m/s);
4. Air pollution degree: Class III according to Article 4.1 of GB5582;
5. The earthquake intensity does not exceed 8 degrees;
6. The thickness of the ice does not exceed 10mm.
Main Technical Parameters
| No. | Item | Unit | Data | |
| 1 | Rated voltage | kV | 12 | |
| 2 | Rated current | A | 630 | |
| 3 | Rated frequency | Hz | 50 | |
| 4 | Rated peak withstand current | kA | 50 | |
| 5 | Rated short-time withstand current | kA | 20 | |
| 6 | Rated short-time withstand current duration | s | 4 | |
| 7 | Rated active load breaking current | A | 630 | |
| 8 | Rated closed-loop breaking current | A | 630 | |
| 9 | Rated cable charging current | A | 10 | |
| 10 | Rated active load breaking current | A | 31.5 | |
| 11 | Rated short circuit switching current | kA | 50 | |
| 12 | Main circuit resistance | μΩ | 95 | |
| 13 | 1 min （dry） Power frequency withstand voltage | interphase, to earth | kV | 42 |
| fracture | 48 | |||
| 14 | 1 min （wet）Power frequency withstand voltage | kV | 30 | |
| 15 | Lightning impulse withstand voltage | interphase, to earth | kV | 75 |
| fracture | 85 | |||
| 16 | Mechanical life | Times | 2000 | |
| 17 | Different Periods of Three-phase Closing | ms | 5 | |
| 18 | Maximum operating torque specified | N. | 300 | |
Product dimensions
