GN30-12 12kV Rotary Indoor High-voltage Disconnect Switch

The GN30-12 series indoor disconnect switch is a rotary-type isolating switch developed for indoor medium-voltage systems with rated voltage up to 12kV and frequency of 50/60Hz. It is mainly used for:

• opening and closing no-load circuits,
• providing visible isolation points,
• ensuring maintenance safety,
• grounding de-energized circuits (D type).

The switch can be installed:

• independently,
• inside high-voltage switchgear panels,
• in RMU and distribution cabinets.

The GN30-12D version includes an additional grounding knife switch for enhanced operational safety.

Main Features

• Rated voltage: 12kV
• Rotary contact knife structure
• Compact installation size
• Strong insulation capability
• Reliable visible isolation gap
• Easy installation and adjustment
• Optional grounding switch (GN30-12D)
• Suitable for indoor switchgear systems
• Stable mechanical and electrical performance

Technical Specifications

Model Meaning

Typical models include:

• GN30-12/400-12.5
• GN30-12/630-20
• GN30-12/1000-31.5
• GN30-12D/1250-31.5

Meaning:

• GN = Indoor disconnect switch
• 30 = Design serial number
• 12 = Rated voltage (kV)
• D = With grounding switch
• 400 / 630 / 1000 / 1250 = Rated current (A)
• 12.5 / 20 / 31.5 = Short-time withstand current (kA)

Working Conditions

• Ambient temperature: -10°C to +40°C
• Altitude: ≤1000m
• Relative humidity:
  • Daily average ≤95%
  • Monthly average ≤90%
• Earthquake intensity: ≤8 degree
• Installation site should be free from:
  • explosive materials,
  • corrosive gases,
  • severe dust,
  • frequent violent vibration.

Applications

• Medium-voltage switchgear
• Indoor substations
• Ring main units (RMU)
• Transformer isolation systems
• Industrial power distribution
• Electrical maintenance isolation

Product Advantages

Compact Rotary Design

The rotary blade structure minimizes installation space and is suitable for compact switchgear cabinets.

Reliable Isolation

Provides a clear visible disconnection point for maintenance safety.

Strong Insulation Performance

Designed for stable operation in medium-voltage indoor systems.

Easy Maintenance

Simple mechanical structure allows convenient installation and long-term maintenance.

Outline Drawing