12kV Indoor High Voltage Disconnect Switch with Earthing Switch

The GN30-12D Vertical Rotary High Voltage Disconnect Switch is a 12kV indoor disconnect switch (isolating switch) with an integrated earthing switch, specifically designed for XGN, HXGN ring main units (RMUs), medium-voltage switchgear, and compact substations.

It provides a visible isolation gap and reliable grounding protection, ensuring the safety of maintenance personnel during equipment inspection and servicing. Featuring a compact vertical rotary mechanism, the GN30-12D is widely used in industrial power distribution systems, utility substations, commercial buildings, renewable energy projects, and prefabricated substations.

Designed for 12kV, 50/60Hz medium-voltage power systems, the switch offers high mechanical reliability, low maintenance requirements, and excellent insulation performance for long-term operation.

The GN30-12D combines ON, OFF, and EARTH positions into one compact mechanism, providing safe switching and grounding while reducing installation space inside switchgear panels.

A clearly visible disconnection point allows operators to verify circuit isolation before maintenance, meeting international safety requirements for medium-voltage equipment.

The integrated earthing switch quickly grounds de-energized circuits, improving maintenance safety and reducing the risk.

• Silver-plated tulip contacts reduce contact resistance.
• Low temperature rise during continuous rated-current operation.
• Stable conductivity and long electrical service life.

The reinforced flame-retardant insulating frame provides:

• Excellent dielectric strength
• High creepage resistance
• Superior resistance to partial discharge
• Long-term performance in humid and dusty environments

A reliable mechanical interlocking system prevents incorrect switching between the isolation and earthing positions, complying with standard five-interlock safety requirements for medium-voltage switchgear.

All conductive components feature anti-corrosion surface treatment, ensuring excellent durability under industrial operating conditions with minimal maintenance.

• 12kV indoor high-voltage disconnect switch with integrated earthing switch
• Compact vertical rotary structure saves installation space
• Three-position operation (ON / OFF / EARTH)
• Visible isolation for safer maintenance
• Silver-plated contacts with low contact resistance
• Reinforced flame-retardant insulation system
• Mechanical interlock prevents misoperation
• High mechanical endurance with low maintenance
• Ideal for XGN, HXGN, RMU, and medium-voltage switchgear

The GN30-12D is widely used in:

• 12kV XGN Fixed Metal-Enclosed Switchgear
• HXGN Ring Main Units (RMUs)
• Compact Substations
• Package Substations
• Industrial Power Distribution Systems
• Commercial Buildings
• Utility Distribution Networks
• Solar Power Plants
• Wind Power Projects
• Energy Storage Systems (ESS)
• Data Centers
• Infrastructure Projects

Its primary function is to isolate no-load circuits and provide reliable earthing protection during equipment inspection and maintenance.

With over 17 years of experience in medium-voltage power distribution equipment, CHANGYUNZHINENG provides reliable disconnect switches and switchgear components for utilities, EPC contractors, industrial facilities, and renewable energy projects worldwide.

Our products are manufactured under strict quality control procedures and can be customized to meet different project requirements, including OEM and ODM services.

FAQ

Q1. What is the function of the GN30-12D disconnect switch?

It provides visible circuit isolation and safe earthing protection for medium-voltage power systems during maintenance.

Q2. Is the GN30-12D suitable for Ring Main Units (RMUs)?
Yes. It is widely used in XGN, HXGN, and other 12kV RMUs and medium-voltage switchgear.

Q3. Does the switch include an earthing function?
Yes. The integrated earthing switch provides safe grounding for de-energized circuits.

Q4. Can it be customized?
Yes. OEM and ODM services are available to meet different project requirements.