GN24-12D 12kV Indoor Isolator Switch | Compact HV Isolator

🛡️ Safe and Reliable Power Isolation for 12kV Indoor Systems

The GN24-12D indoor  isolator switch is a high-voltage isolator designed for 12kV medium-voltage switchgear. Engineered for safe disconnection during inspection, maintenance, and equipment replacement, it features visible breaking contacts, strong arc resistance, and compact dimensions for space-constrained indoor substations.

Compliant with IEC 62271-102 and GB 1985, this unit is widely installed in factory power distribution rooms, urban substations, and renewable energy control cabinets.

1. Altitude: Not exceeding 1000m;

2. Ambient temperature: Upper limit +40℃, lower limit -25℃;

3. Relative humidity: Daily average not greater than 95%, monthly average not greater than 90%;

4. Seismic intensity: Not exceeding degree 8;

5. Use places: Places without fire, explosion hazards, chemical corrosion, and severe vibration;

6. Pollution level: Level 2;

⚙️ Technical Specifications

Parameter	Value
Model	GN24-12D
Rated Voltage	12kV
Rated Current	630A / 1250A
Rated Short-Time Current	20kA (4s)
Frequency	50Hz
Insulation Level	28kV/75kV (1 min/impulse)
Breaking Capacity	Manual disconnection, non-load
Installation Type	Indoor, horizontal installation
Mounting Mode	Wall-mounted / switchgear-mounted
Operating Mechanism	Manual, spring-assisted
Mechanical Endurance	≥ 2000 operations

🌟 Key Features

• Compact Indoor Design
  Ideal for panel-type switchgear or distribution enclosures where space is limited.

• Visible Isolation Contacts
  Supports operator safety by allowing direct visual confirmation of disconnection.

• Robust Arc-Resistant Contacts
  Minimizes oxidation and ensures low contact resistance over long service periods.

• Flexible Mounting
  Can be wall-mounted or integrated within metal-enclosed switchgear units.

• Easy Manual Operation
  Equipped with a spring-assisted handle and mechanical locking.

✅ Application Scenarios

• Urban Power Distribution Cabinets
  Compact form factor makes it ideal for inner-city 12kV control rooms.

• Solar and Wind Power Collector Rooms
  Used in DC-to-AC conversion stations for equipment isolation.

• Industrial Plant Medium Voltage Rooms
  Often deployed in automotive and steel plants for line-side disconnection.

🔍 Real-World Use & Feedback

🔹 Daniel M. – Electrical Engineer, Enel Italy
"Simple structure and fast installation. Perfect for our modular indoor MV stations."

🔹 Hannah T. – Maintenance Lead, Hydro One (Canada)
"We use GN24-12D in solar plant collector cabinets. Zero arc flash issues so far."

🔹 Victor K. – Technical Buyer, Siemens Mobility UK
"The isolation contact visibility helps our field teams during quick replacements."

🔹 Ahmed S. – Grid Asset Manager, Saudi Electric Company
"Smooth mechanical operation even after 3 years in desert substations."

🔹 Lucas B. – Substation Integrator, Iberdrola (Spain)
"Space-saving design fits our compact RMUs perfectly."

❓ FAQ – GN24-12D Indoor  Isolator Switch

• Can GN24-12D interrupt load current?
No, it is an isolator, not designed to break current under load. Use with circuit breakers or load break switches.

• What’s the mechanical lifespan?
Rated for 2000+ operations, ensuring long-term reliability in MV rooms.

• Does it need lubrication?
Light lubrication every 2–3 years is sufficient in most indoor environments.

• Can it be remotely controlled?
No. This is a manually operated isolator with a mechanical lock. For automation, consider motorized  isolator switches.

• Is it IEC-certified?
Yes. Complies with IEC 62271-102, and a full type test report is available.