Model Designation and Its Interpretation
Executed Standards
GB/T 1985 High-voltage Alternating Current Disconnectors and Earthing Switches
DL/T 486 High-voltage Alternating Current Disconnectors and Earthing Switches
Notes on Ambient Operating Conditions
Altitude shall not exceed 2000 m; seismic withstand capacity (horizontal acceleration) is 2 m/s².
The ambient air temperature shall not exceed +50°C, and the minimum temperature measured within 24 hours shall not be lower than -40°C.
It is not suitable for use in locations with frequent severe vibrations, locations where water vapor, gases, chemical corrosive deposits, salt mist, dust and dirt that obviously affect performance exist, as well as explosive and fire-hazardous environments.
Technical Parameters
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Rated Voltage
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12kV
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Rated Continuous Current
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630A
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Rated Frequency
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50Hz
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Electrical Endurance
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Making Capacity for Ground Fault
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5/E2 (Times)
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Rated Short-time Withstand Current (RMS Value) and Duration
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Main Circuit / Earthing Switch
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20/4; 25/4 (kA/s)
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Earthing Connection Circuit
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17.4/2; 21.75/2 (kA/s)
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Rated Peak Withstand Current
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Main Circuit / Earthing Switch
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50; 63 (kA)
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Earthing Connection Circuit
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43.5; 54.8 (kA)
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Mechanical Endurance
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Isolator / Earthing Switch
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5000 (Times)
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Insulation Test
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Power-frequency Withstand Voltage of Main Circuit for 1 min: Phase-to-phase, Phase-to-ground / Breaks
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42/48 (kV)
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Lightning Impulse (12/50 μs) Withstand Voltage of Main Circuit: Phase-to-phase, Phase-to-ground / Breaks
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75/85 (kV)
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Power-frequency Withstand Voltage of Auxiliary Control Circuit for 1 min
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2 (kV)
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Control Voltage of Auxiliary Circuit (V)
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24、48、110、220DC
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110、220AC
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Overall and Mounting Dimensions
Operating Procedure
Mount and secure the mechanism onto the switch body. Insert the dedicated operating handle into the isolation operating shaft of the mechanism, rotate it clockwise by approximately 75° to complete the isolation closing operation, and rotate it counterclockwise by approximately 75° to complete the isolation opening operation.
Insert the dedicated operating handle into the grounding operating shaft of the mechanism, rotate it counterclockwise by approximately 75° to complete the grounding closing operation, and rotate it clockwise by approximately 75° to complete the grounding opening operation.
