Indoor Disconnect Switch

The GN30-12 series indoor rotary high-voltage disconnecting switch is a new type of rotary contact knife-type disconnecting switch. Its main structure consists of two sets of insulators and contacts fixed on the upper and lower planes of a three-phase common low-voltage frame. The switch is opened and closed by rotating the contact knife. The GN30-12D type switch is based on the GN30-12 type switch with the addition of a connecting knife, which can meet the needs of different power systems. This product has a compact design, small footprint, strong insulation capacity, and is easy to install and adjust. Its performance meets the requirements of GB1985-89 "AC High-Voltage Disconnecting Switches and Grounding Switches" and is suitable for indoor systems with a rated voltage of 10 kV AC 50Hz or below, used for opening and closing circuits under voltage and no-load conditions. It can be used in conjunction with high-voltage switchgear or independently.

Altitude not exceeding 1000 meters;

Ambient temperature not exceeding 40°C and not falling below -5°C;

Relative humidity not exceeding 95%;

No explosive media;

No exposure to rain or snow;

Note: If the operating environment does not meet the above conditions, please inform the manufacturer of the details.

Sizes may be updated, please contact us.

1. Installation site requirements: Indoor, ambient temperature -10℃ to +40℃, relative humidity ≤85% (at 25℃), free from corrosive gases/dust.

2. Confirm the installation cabinet is a 12kV indoor switchgear (e.g., XGN2, KYN28). The cabinet strength must be able to support the weight of the disconnecting switch (approximately 20~30kg).

3. Verify the model (e.g., GN30-12/630), rated current, and grounding switch configuration. Check for cracks in the insulators and deformation of the contacts.

4. Test the operating mechanism: Manually rotate the contacts to confirm smooth and unobstructed opening and closing angles (usually 90°).

5. Mechanical fixing: Use M8 bolts to tighten the base frame. Control the installation torque to 12~15N・m (avoid overtightening to prevent damage to the insulators).

6. When installing through a wall, the sealing gap between the flange and the cabinet must be filled with insulating sealant to prevent dust from entering.

7. Electrical connection: incoming line/ 8. Use copper busbars with the corresponding cross-section for the outgoing terminals (30×4mm for 400A, 40×4mm for 630A). Tighten the terminals with a torque of 18~20 N·m.

9. The grounding switch wiring must be led to the cabinet's grounding busbar separately; it is prohibited to share a grounding circuit with other equipment.

10. Interlocking test: Interlock with the switchgear circuit breaker: When the circuit breaker is closed, the disconnecting switch cannot be opened or closed; when the disconnecting switch is open, the circuit breaker cannot be closed.

11. Grounding switch interlock: When the disconnecting switch is closed, the grounding switch cannot be closed; when the grounding switch is closed, the disconnecting switch cannot be closed.