GN24-12/630 Four-Pole Indoor Isolator Switch

12kV 630A Manual Isolator for Indoor Metal-Clad Switchgear and Busbar Systems

The GN24-12/630 four-pole indoor isolator switch is designed for medium voltage indoor applications up to 12kV, providing reliable isolation for busbars, switchgear panels, and auxiliary power lines. This model offers mechanical interlocking, visible break contact, and a compact footprint suitable for fixed switchgear and transformer stations.

With four poles instead of the standard three, this switch is ideal for systems requiring neutral conductor switching, earthing provisions, or dual-supply isolation within TN-S or TT earthing systems.

🔧 Key Features

Rated Voltage: 12kV
Rated Current: 630A
Number of Poles: 4 (3-phase + neutral)
Installation Type: Indoor / panel-mounted
Operation Mode: Manual spring or lever drive
Structure: Vertical double-break isolating contacts
Standards: IEC 62271-102 / GB 1985-2004

🌍 Typical Applications

Isolation and maintenance switching in indoor MV switchgear
Busbar sectionalizing and interlocking in compact panels
Neutral disconnection for protection or inspection operations
Double-supply transformer systems requiring 4P switching
Industrial substations, mining substations, control rooms

Its rugged design makes the GN24-12 suitable for both utility distribution networks and OEM switchgear panel assembly.

📊 Technical Specifications

Parameter	Specification
Rated Voltage	12kV
Rated Current	630A
Rated Frequency	50Hz
Rated Short-Time Withstand	20kA / 4s
Lightning Impulse Withstand	75kV
Power Frequency Withstand	42kV (1 min)
Mechanical Life	≥2000 operations
Operating Mechanism	Manual lever / rotary drive
Installation	Wall or panel back-mounted

GN24-12/630 Four-Pole Indoor Isolator Switch

⚙️ Design Benefits

Four-pole design supports neutral or ground switching
Double-break contacts ensure visible and safe isolation
Compact size allows easy integration into 650 mm-wide switchgear
An optional earthing switch or mechanical lock for interlock logic
Flexible terminal layout for top-bottom or front-rear connection
Arc-proof mounting option available for critical applications

❓ Frequently Asked Questions

• Why choose a four-pole isolator switch over a standard 3P?
A 4P switch allows full isolation of the neutral conductor, especially required in systems with sensitive loads or grounding schemes.

• Can this be used with vacuum circuit breakers?
Yes. It is often paired with indoor VCBs as a maintenance isolation device.

• Is motorized operation available?
For the GN24 series, manual operation is standard. For motorized versions, consider GN30 or customized options.

• How is the visible isolation ensured?
The vertical double-break contact blades provide a physical air gap that’s visible through inspection windows or directly in open panels.

• Does it come with interlocking features?
Yes. It can be supplied with mechanical or electrical interlocks to coordinate with breakers or earthing devices.