24kV Indoor High Voltage Disconnect Switch

For 24kV switchgear projects, the GN30-24 series 24kV Indoor High Voltage Disconnect Switch from Dongfa Intelligent provides a factory-direct solution that aligns current rating, short-circuit withstand, and installation format with actual cabinet conditions. It is available in 400A, 630A, 1000A, and 1250A, with thermal stability currents of 12.5kA, 20kA, and 31.5kA, and corresponding dynamic stability currents of 31.5kA, 50kA, and 80kA. The switch delivers 42kV power-frequency withstand and 75kV impulse withstand, and offers Flat-in/Flat-out and Vertical-in/Flat-out options for different busbar layouts. Procurement teams can request a quote with their system parameters for selection support.

Core Advantages

The 24kV Indoor High Voltage Disconnect Switch is built for precise matching, flexible installation, and reliable 24kV insulation performance.

Four Current Ratings for Precise Coverage

400A, 630A, 1000A, and 1250A ratings pair with 12.5kA, 20kA, and 31.5kA thermal stability currents. Select based on system short-circuit capacity to avoid over-design or under-design.

Two Installation Types for Different Cabinet Layouts

Flat-in/Flat-out and Vertical-in/Flat-out options suit different busbar routing and cabinet space conditions, reducing design and assembly difficulty.

High Insulation Margin for 24kV Systems

42kV power-frequency withstand and 75kV impulse withstand meet 24kV indoor insulation coordination requirements.

Factory Direct with IEC Configuration

Dongfa Intelligent factory direct supply, GB and IEC 62271 compliant, with lower cost than European/US brands.

Fast Lead Time and Factory Testing

Standard products: 7-15 working days. Custom products: 15-30 working days. MOQ 1 unit for standard products. Each unit passes resistance, mechanical operation, and withstand voltage tests.

GN30-24 Series Specifications

The 24kV Indoor High Voltage Disconnect Switch covers four current ratings with the following short-circuit and insulation parameters.

Installation Types

Flat-in/Flat-out

Busbars enter and exit horizontally from both sides. Suitable for cabinets with sufficient width and side entry.

Vertical-in/Flat-out

Busbars enter vertically from above and exit horizontally from the side. Suitable for cabinets with sufficient height and top entry.

How to Choose

Select based on actual busbar routing and cabinet space. Provide the cabinet layout drawing during inquiry for confirmation.

Installation Dimensions by Current Rating

• 400A and 630A: shared mounting hole distance (2-Φ13 or 4-Φ13).
• 1000A: 4-Φ13 (40×80mm spacing).
• 1250A: 4-Φ13 (60×100mm spacing).

Confirm the corresponding installation drawing by rated current before ordering to avoid installation mismatch.

Selection Guide

Thermal Stability Current (4s)

12.5kA suits smaller capacity feeder cabinets. 20kA suits medium capacity distribution. 31.5kA suits main transformer incoming cabinets or large capacity systems.

Dynamic Stability Current

31.5kA, 50kA, and 80kA correspond to different system short-circuit capacities. Dynamic stability current is typically about 2.5 times the thermal stability current.

Selection Logic

Confirm system short-circuit capacity first, then select thermal stability current, and finally match dynamic stability current.

Key Parameters to Confirm

• Rated Voltage: 24kV.
• Rated Current: 400A / 630A / 1000A / 1250A.
• Thermal Stability Current: 12.5kA / 20kA / 31.5kA (4s).
• Dynamic Stability Current: 31.5kA / 50kA / 80kA.
• Installation Type: Flat-in/Flat-out or Vertical-in/Flat-out.
• Installation Dimensions: Confirm by current rating.

FAQ

Q1: What is the insulation difference between 24kV and 12kV disconnector switches?

24kV systems require larger air gaps, creepage distances, and stricter insulation materials. This product provides 42kV power-frequency withstand and 75kV impulse withstand.

Q2: How to choose between Flat-in/Flat-out and Vertical-in/Flat-out?

Flat-in/Flat-out uses horizontal busbar entry and exit from both sides. Vertical-in/Flat-out uses vertical entry from above and horizontal exit from the side. Choose based on busbar routing and cabinet space.

Q3: How to choose between 12.5kA, 20kA, and 31.5kA?

Select based on system short-circuit capacity. 12.5kA suits smaller capacity feeder cabinets, 20kA suits medium capacity distribution, and 31.5kA suits main transformer incoming cabinets or large capacity systems.

Q4: What is the lead time and MOQ?

Standard products support MOQ 1 unit. Standard lead time is 7-15 working days. Custom products take 15-30 working days.

Request a Quote

Request a quote for the 24kV Indoor High Voltage Disconnect Switch. Provide rated current, thermal/dynamic stability requirements, installation type, installation dimensions, and quantity. Technical proposal within 24 hours.