1. Reliability: JN17-12 earthing switch is designed to protect the power system and therefore has high reliability. They must be able to respond quickly to faults in the circuit to ensure safe operation of the power system.
2. Quick action: The grounding switch must be able to act quickly when a fault occurs to isolate and ground the fault to prevent current from passing through the fault area, thereby protecting the safety of equipment and personnel.
3. Durability: These switches usually need to withstand frequent operations, so they must have durability and long-term stability to ensure their reliability in long-term use.
4. Easy to install and maintain: JN17-12 earthing switches are generally designed to be easy to install and maintain so that they can be quickly repaired or replaced when needed.
5. Comply with standards: These switches usually comply with relevant power system safety standards and regulations to ensure that their design and operation comply with industry standards and ensure the safety of the power system.
Operating environment conditions:
1. Ambient air temperature:. Upper limit +40℃, lower limit -25°C ; .
2. Altitude of sea level: not more than 1000m.
3. Humidity conditions: average daily relative humidity not exceeding 95%, average monthly relative humidity not exceeding 90%;.
4. Seismicity: not more than 8 degrees.
5. Filthiness level: Class II.
| Item | Unit | Data | ||
| Rated voltage | kV | 12 | ||
| Rated short-time withstand current | kA | 50 | ||
| Rated short-circuit duration | s | 4 | ||
| Rated short-circuit making current | kA | 125 | ||
| Rated peak withstand current | kA | 125 | ||
| Rated insulation level | PF withstand voltage(1 min) | kV | Phase to earth | 42 |
| Lightning impulse withstand voltage | Phase to phase | 75 | ||
| Mechanical endurance | time | 2000 | ||
JN17 Earth switch shape and mounting dimensions
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