GIS Three-position Load Break Switch for Gas Insulated Switchgear – 12kV to 40.5kV Medium Voltage LBS with Making, Isolating, and Earthing Functions
The GIS Three-position Load Break Switch is a high-performance electrical component designed specifically for Gas-Insulated Switchgear (GIS). This single compact unit seamlessly integrates three critical operational functions: making, isolating, and earthing, ensuring maximum system stability and maintenance safety.
Product Name
GIS Three-position Load Break Switch for Gas Insulated Switchgear – 12kV to 40.5kV Integrated Making, Isolating, and Earthing LBS
Product Overview
The GIS Three-position Load Break Switch is a high-performance electrical component designed specifically for Gas-Insulated Switchgear (GIS). It features a modular and compact design that fits seamlessly into medium-voltage GIS enclosures, enabling flexible installation while saving critical space.
This single unit integrates three essential operational functions—making, isolating, and earthing. Utilizing advanced arc extinguishing technology with gas-filled chambers, it ensures a high breaking capacity and an extended service life even in harsh environments.
Technical Parameters
| Item | Specification | Unit | Data |
| Rated Voltage | System Voltage | kV | 12 / 24 / 40.5 |
| Rated Frequency | Power Frequency | Hz | 50 |
| Rated Current | Load Current | A | 630 |
| Rated Short-time Withstand Current | Thermal Stability | kA | 20 / 25 |
| Rated Peak Withstand Current | Dynamic Stability | kA | 50 |
| Rated Short-circuit Duration | Time Limit | s | 4 |
| Rated Short-circuit Closing Current | Fault Closing | kA | 50 |
| Theoretical Operation | Mechanical Life | times | 5000 |
Key Features & Advantages
1. Three-Position Integrated Design
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Making: Reliably carries rated currents and short-time fault currents to ensure system stability.
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Isolation: Features visible breakpoints to ensure safe and absolute electrical isolation during maintenance.
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Earthing: Rapid grounding functionality protects personnel and equipment during system servicing.
2. Advanced Engineering
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Arc Extinguishing: Optimized contact structures and gas-filled arc chambers deliver superior interruption performance.
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Reliability: A fully sealed structure makes the switch resistant to dust and moisture, ideal for harsh industrial environments.
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Easy Maintenance: A three-position mechanical interlock simplifies operations and significantly reduces the need for frequent gas refilling.
Environmental Operating Conditions
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Altitude: Should not exceed 2000m.
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Ambient Temperature: Operates reliably between -40°C and +140°C.
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Humidity: Daily and monthly average relative temperature should not exceed 90%.
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Vibration: Vibration cracking degree should not exceed 8 degrees.
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Note: Not suitable for sites with frequent severe vibrations, chemical corrosive deposition, or high fire/explosion hazards.
Applications
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Urban distribution networks
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Industrial substations
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Renewable energy integration (Solar, Wind)
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Rail transit power systems
Selection details for GIS Three-position Load Break Switch for Gas Insulated Switchgear
To confirm the required switchgear component configuration for your project, include:
- Exact equipment/model reference, required electrical ratings and operating function
- Installation dimensions, mating interfaces and mechanical/electrical drawings
- Control requirements, operating environment, quantity and destination country
Drawings and quotation requirements
Send the model reference, application, quantity and destination country together with the relevant drawing or existing equipment information. Confirm the selected configuration against a model-specific drawing and ratings sheet before ordering; request the applicable test documentation for your project requirements.
Request model confirmation and a technical quotation · Compare related Gas Insulated Switchgear Parts / GIS Circuit Breaker.
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