GN30 Outdoor HV Disconnect Switch
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产品详情
GN30 Outdoor High Voltage Disconnect Switch
1. Product Overview
GN30 outdoor high voltage disconnect switch is a high-voltage primary switching component widely used in outdoor substations, pole-mounted distribution systems, transformer stations and overhead line networks. It is mainly used to create a visible isolation breakpoint in high voltage circuits, so that maintenance, inspection and equipment replacement can be carried out safely.
This outdoor isolator can be installed on metal poles, support frames or substation structures. It generally consists of a metal base, support insulators, fixed contacts, moving blades, operating lever and connection terminals. With simple structure, reliable mechanical operation and clear isolation status, it is suitable for 10kV outdoor power distribution systems.
2. Main Features
- Outdoor high voltage disconnect switch for 10kV distribution systems
- Creates a visible isolation breakpoint for safety maintenance
- Simple and robust mechanical structure
- Clear open and close position indication
- Suitable for pole-mounted and substation installation
- Equipped with support insulators, contact blades and operating lever
- Reliable conductive contact system
- Easy to install, operate and maintain
- Used for line switching, transformer isolation and maintenance safety protection
3. Technical Specifications
| Item | Typical Specification |
| Product Type | Outdoor High Voltage Disconnect Switch |
| Model | GN30 |
| Rated Voltage | 10kV |
| Rated Current | 400A / 630A / 1250A as required |
| Short-Time Withstand Current | According to system requirement |
| Insulator Type | Porcelain or composite insulator optional |
| Installation Method | Pole mounted / substation frame mounted |
| Operation Type | Manual operation lever or extended operating rod |
| Main Function | Visible isolation, line switching, maintenance protection |
| Application | Overhead line, substation, transformer station |
| Suitable Environment | Outdoor, dry and wet climate conditions |
4. Structure Description
| Part | Function |
| Metal Base | Supports the whole switch and provides installation interface |
| Support Insulator | Provides electrical insulation between high voltage parts and base |
| Fixed Contact | Establishes stable electrical connection in closed position |
| Moving Blade | Connects or disconnects the circuit through opening and closing movement |
| Operating Lever | Allows manual operation to open or close the switch |
| Connection Terminal | Connects to overhead line, busbar or transformer equipment |
| Locking Device | Keeps the switch in open or closed position during operation |
5. Working Principle
The GN30 disconnect switch operates through mechanical opening and closing of the moving blade. When the switch is closed, the moving blade makes contact with the fixed contact, and the high voltage circuit is connected. When the switch is opened, the blade moves away from the fixed contact, creating a clear visible isolation gap.
Because the disconnect switch does not have built-in arc extinguishing device, it is generally used to isolate the circuit after the load is cut off by a circuit breaker or load switch. Its main function is to provide a visible break point for maintenance safety, rather than breaking normal load current under arc conditions.
6. Application Scope
GN30 outdoor disconnect switch is commonly used in:
- 10kV overhead line systems
- Outdoor substations
- Pole-mounted transformer stations
- Distribution transformer protection points
- Ring main units and feeder lines
- Maintenance safety isolation points
- Industrial power distribution outdoor stations
- Municipal power grid renovation projects
- Renewable energy power collection lines
7. Installation Instructions
- Before installation, check the switch body, insulators, contacts, operating lever and mounting hardware for damage.
- Verify the model, rated voltage, rated current and installation method according to the project requirements.
- Install the switch on a rigid metal pole, support frame or substation structure.
- Ensure sufficient safety clearance between the switch and other live parts or grounding objects.
- Connect the incoming and outgoing terminals firmly to the overhead line, busbar or transformer equipment.
- Adjust the operating mechanism to ensure smooth opening and closing.
- Confirm that the open position provides a clear visible isolation gap.
- After installation, perform insulation test, contact check and operation test before commissioning.
8. Safety Warnings
- Installation, operation and maintenance must be performed by qualified electrical personnel.
- Do not operate the disconnect switch while the circuit breaker or load switch is closed.
- Do not open or close load current with the disconnect switch unless the design specifically allows it.
- Before maintenance, confirm that all upstream power supplies are cut off and the isolation gap is clearly visible.
- Keep the operating lever in a locked or tagged position during maintenance.
- If insulators are cracked, contacts are burned or mechanical operation is blocked, stop using the switch immediately.
- Keep the product nameplate, wiring diagram and technical documents for future reference.
9. Ordering Information
When placing an order, please provide the following information:
- Product model: GN30
- Rated voltage
- Rated current
- Installation method: pole mounted or substation mounted
- Insulator type: porcelain or composite
- Operation requirement
- Quantity
- Applicable standard or destination market requirement
10. Packing and Export Note
Each GN30 outdoor high voltage disconnect switch is packed with shockproof foam and then placed into an export carton or wooden case. The packaging is reinforced to protect insulators, metal parts and operating mechanism from collision, moisture and vibration during sea, land or air transportation. Neutral English labeling is available according to export requirements.
