Outdoor high-voltage AC single-phase isolation switch (hereinafter referred to as "isolation switch"), for the 1 0kV line under the condition of voltage and no load, and the maintenance of high-voltage bus, circuit breakers and other electrical equipment and live high-voltage line for electrical isolation.
The altitude does not exceed 1000m.
The ambient air temperature: Maximum+40°C; Minimum:-30°C,Paramos-40°C.
The wind pressure does not exceed 700Pa.(corresponding to 34m/s wind speed).
The earthquake intensity does not exceed 8 degrees.
The working situation hasn't frequent violent vibration.
The installation site of ordinary type isolator should be kept away from gas, smoke chemical deposition, salt-spray fog, dust and other explosive and corrosive maters that affect seriously insulation and conduction capability of the isolator.
Pollution-proof type isolator is applying to severe filthy conduction area; however, it shouldn't be any explosive matters and matters causing fire
It is a single-phase structure, and each phase is composed of a bottom frame, a pillar insulator, a knife and a contact.
The upper end of the knife is equipped with a fixed pull button and a self-locking device for opening and closing the insulated hook rod.
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| Name | Unit | Data | |
| Rated frequency | Hz | 50 | |
| Rated voltage | kV | 12 | |
| Rated current | A | 630(1250) | |
| Rated short-time withstand current and duration | kA/s | 20(25)/4 | |
| Rated peak withstand current | kA | 50(63) | |
| Rated short-time power frequency withstand voltage | Phase to phase,to earth(dry) | kV/min | 42/1 |
| Open contact(dry) | 48/1 | ||
| Phase to phase,to earth(wet) | 30/1 | ||
| Open contact(wet) | 36/1 | ||
| Rated lightning impulse withstand voltage | Phase to phase,to earth | kV | 75 |
| Open contact | 85 | ||
| Loop resistance | μΩ | ≤80 | |
| Mechanical life | Times | 3000 | |
| Pollution grade | e Grade | ||
| creep age distance | mm | ≥372 | |
