GN30-12 Indoor Isolator Switch | 12kV Rotary Isolator

The GN30-12 indoor high-voltage isolator switch is a compact, rotary-type isolator used in 12kV indoor switchgear for safe disconnection and visible isolation. It is widely applied in KYN28, XGN, and compact substations where reliable mechanical breaking is required.

🔧 Product Overview

The GN30-12 is a horizontal rotary Isolator switch with a double-break structure. Designed for three-phase AC systems at 50Hz, it provides a clear break point for maintenance safety. Optional earthing contacts and arc-proof housing are available.

Key Features:

Compact rotary structure for 12kV indoor use
Manual or motorized operating mechanism
Double-break design for better insulation distance
Fixed or plug-in mounting options
High mechanical endurance up to 2000 operations

📐 Technical Specifications

Parameter	Value
Model	GN30-12
Rated Voltage	12kV
Rated Current	630A / 1250A / 1600A
Short-Time Withstand Current	20kA / 25kA / 31.5kA (1s)
Peak Withstand Current	50kA / 63kA
Insulation Level	42kV/1min, BIL 75kV
Mounting Type	Vertical or horizontal (wall/floor)
Operation Type	Manual spring handle / motorized
Mechanical Life	≥2000 operations
Standards	IEC 62271-102 / GB 1985

✅ Compliance & Standards

IEC 62271-102: High-voltage switchgear and controlgear – Part 102: AC disconnectors and earthing switches
GB 1985-2004: Chinese national standard for AC disconnectors and earthing switches
ISO 9001: Manufacturing quality assurance
CE compliant: Optional for EU markets (on request)

🧰 Application Scenarios

Indoor switchgear systems (KYN28, XGN15)
Industrial substations and power control rooms
RMU cabinets requiring sectional disconnection
Urban power grids and compact modular substations

📊 Real Case: Bolivia Factory Project (2021)

In 2021, a textile plant in Santa Cruz, Bolivia, installed 80+ GN30-12 Isolator switches within their KYN28 indoor panels. These isolators provided safe maintenance access and met the arc clearance requirements under IEC standards.

Outcome:

Enhanced maintenance reliability
Safe isolation for indoor switchgear up to 12kV
Improved mechanical lifespan over 2 years of use

🛠 Installation Tips

Always align phase contacts before racking in
Use torque tools for bolt tightening during panel mounting
Check interlock functionality before energization
Verify insulation resistance after installation
For earthing-enabled versions, confirm ground terminal bonding

❓ Frequently Asked Questions (FAQ)

1. What’s the difference between GN19 and GN30?
GN19 uses a straight arm structure, while GN30 adopts a rotary mechanism for a more compact design.

2. Can GN30-12 be motorized?
Yes, we provide motorized operating mechanisms with a remote control interface.

3. What types of cabinets are compatible?
KYN28A, XGN15, HXGN indoor metal-clad switchgear, and most custom panels.

4. Is earthing contact available?
Yes, an optional earthing knife switch can be included for each phase.

5. How often should it be maintained?
Inspection every 6–12 months, especially for contact wear and torque adjustment.