As the upgraded version of SF6 inflatable switch device, this XGNY2-12 solid insulated ring main unit utilizes the solid insulation technology without SF6 gas. It is perfectly in consistent with requirements on environmental protection. Our product gets all the conductive parts sealed or insulated to prevent the discharging of each phase.
Our product is thoroughly insulated, shielded and free of maintenance. It is not subject to the external contaminant and metal lap any more. Due to the modular assembly design, it is convenient for the solid insulated ring main unit to expand the circuit and replace the units and systems.
Configured with the spring operation mechanism, the product can be manipulated by motor or manually. Moreover, it comes with credible mechanical interlocking performance, totally meeting the interlocking demands.
Rated Parameters| No. | Item | Unit | Technical data | |
| 1 | Rated voltage | kV | 12 | |
| 2 | Rated current | A | 630 | |
| 3 | Rated frequency | Hz | 50 | |
| 4 | Rated short circuit breaking current | kA | 20 | |
| 5 | Rated short circuit making current | kA | 50 | |
| 6 | Rated cable charging current | A | 25 | |
| 7 | Thermo-dynamic current (virtual value) | Main circuit (4s) | kA | 20 |
| Earthing switch and earthing circuit | ||||
| 8 | Thermo-dynamic current (peak value) | Main circuit (4s) | kA | 50 |
| Earthing switch and earthing circuit | ||||
| 9 | Insulation test (across gap, to ground) | 1min P.F. withstand voltage (gap/earthing) | kV | 48/42 |
| Lightning impulse (gap/earthing) (peak) | kV | 85/75 | ||
| 10 | Resistance of main circuit | μΩ | <100 | |
| 11 | Resistance of earthing circuit | μΩ | <60 | |
| No. | Item | Unit | Technical data | |
| 1 | Open distance of contact | Main gap | mm | 9±1 |
| Disconnect gap | 8±1 | |||
| Earthing gap | 8±1 | |||
| 2 | Over travel of contact | Main gap | mm | 3±1 |
| Disconnect gap | 2.5±1 | |||
| Earthing gap | 2.5±1 | |||
| 3 | Average closing speed | Main gap | m/s | 0.6+0.2 |
| Disconnect gap | 0.6+0.2 | |||
| Earthing gap | 0.6+0.2 | |||
| 4 | Average opening speed (main gap) | m/s | 1.2+0.2 | |
| 5 | 3-pole closing and opening synchronism | ms | ≤2 | |
| 6 | Closing bouncing time | ms | ≤2 | |
| 7 | Closing time (main gap) | ms | 30~37 | |
| 8 | Opening time (main gap) | ms | 30~37 | |
| 9 | Mechanical life | Times | 30000 | |
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