Disconnector (GN30-12 Indoor High Voltage Disconnect Switch)

Disconnector <small>(GN30-12 Indoor High Voltage Disconnect Switch)</small>
Disconnector <small>(GN30-12 Indoor High Voltage Disconnect Switch)</small>
Disconnector <small>(GN30-12 Indoor High Voltage Disconnect Switch)</small>
Disconnector <small>(GN30-12 Indoor High Voltage Disconnect Switch)</small>
Disconnector <small>(GN30-12 Indoor High Voltage Disconnect Switch)</small>
Disconnector <small>(GN30-12 Indoor High Voltage Disconnect Switch)</small>
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Introduction
The GN30-12 indoor disconnector (hereinafter referred to as the disconnector) is a rotary switch of 12kV rated voltage, three-phase AC 50Hz for indoor use. This isolator switch is specially designed for XGN2-12, XGN66-12, HXGN-12 and other MV switchgears. The function of the disconnector is to make and break currents in the presence of no-load voltage, enabling the circuit breaker and the main bus to be isolated and grounded to ensure safe maintenance and reduce risks of accidents.

Service Conditions
1) Altitude: ≤1000m
2) Ambient air temperature: up to 40 ℃, down to -10 ℃, daily range of 15 ℃
3) Humidity: daily average relative humidity less than 95%; monthly average relative humidity less than 90%
4) Earthquake intensity: ≤ 8 degrees
5) Environmental conditions: no fire, explosion, severe dust, chemical corrosion and severe vibration;contamination class II.

Model and Meaning
1. □ - 4S thermal current (kA}
2. □ - rated operating current (A)
3. D – earthing device
4. 12 - rated voltage (kV)
5. 30 - design number
6. GN-indoor MV disconnector
Technical Parameters of Indoor High Voltage Disconnect Switch
1. Mechanical Performance Parameters
Item Name Unit Parameters
1 Fracture opening distance mm 125
2 Insulation distance mm 125
3 Blade contact surface range -- 2/3
4 Pole-center distance mm 210/230/250/275
5 Three-phase closing simultaneity ms 3
2. Electrical Technical Parameters of Main Specifications
ItemSpecificationRated
Voltage(kV)
Rated Current(A)Reted Peak Withstand
Current(kA)
4S Thermal Short-time
Withstand Current(kA)
1GN30-12(D)/400-12.51240031.512.5
2GN30-12(D)/630-206305020
3GN30-12(D)/1000-2510006325
4GN30-12(D)/1250-31.512508031.5
Outline and Mounting Dimension Drawing
SpecificationABCDE
GN30-12210680720800810
230720760840850
250760800880890
275810800960970

Note:
1. Inlet and outlet: when terminal block is perpendicular to switch chassis mounting surface, it is vertical inlet and outlet; when terminal block is parallel to switch chassis mounting surface, it is horizontal inlet and outlet.
2. Definition of inlet and outlet end: for the upper and lower disconnectors, the end away from the circuit breaker is the outlet end, on the contrary, the one close to the circuit breaker, namely the one directly connected to the circuit breaker, is the inlet end.
3. Operating direction: facing the switchgear, the operating direction is left if the operating mechanism is positioned on the left, and vise versa.

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