VBI-24 Handcart Type Indoor Vacuum Circuit Breaker for KYN28-24 Switchgear (24kV)
The VBI-24 handcart type indoor vacuum circuit breaker is a high-performance three-phase AC 50Hz power distribution unit rated at 24kV. It features advanced embedded pole technology to enhance insulation reliability and provide a maintenance-free experience with an extended mechanical life. Specifically designed for KYN28-24 (GZS1) high-voltage switchgear, this M-E2-C2 grade breaker offers superior protection and control for industrial, mining, and substation power plants.
VBI-24 Handcart Type Indoor Vacuum Circuit Breaker (24kV)
Product Overview
The VBI-24 series handcart type vacuum circuit breaker is a high-performance three-phase AC 50Hz indoor power distribution unit with a rated voltage of 24kV. Specifically designed for KYN28-24 (GZS1) and similar mid-mounted switchgear, this breaker offers superior protection and control for electrical equipment in power plants, substations, and industrial mining enterprises. Its handcart design ensures easy installation and rapid maintenance within high-voltage switchgear systems.
Advanced Embedded Pole Technology
The VBI-24 features a leading-edge conductive circuit design:
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High Reliability: The use of embedded poles greatly improves insulation reliability, mechanical strength, and breaking performance.
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Maintenance-Free: This design protects the vacuum interrupter from external environmental factors, realizing a truly maintenance-free operation and extending both mechanical and electrical service life.
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Standards Compliance: The unit reaches the M-E2-C2 capability grade, conforming to national and international IEC standards.
Technical Specifications
| Item | Unit | Technical Data |
| Rated Voltage | kV | 24 |
| Rated Current | A | 630 / 1250 / 1600 / 2000 / 2500 / 3150 |
| Rated Frequency | Hz | 50 |
| Power Frequency Withstand Voltage (1min) | kV | 65 |
| Lightning Impulse Withstand Voltage (Peak) | kV | 125 |
| Rated Short-Circuit Breaking Current | kA | 20 / 25 / 31.5 |
| Rated Short-Circuit Duration | s | 4 |
| Rated Operating Sequence | – | O-0.3s-CO-180s-CO |
| Maximum DC Component | % | 50% |
Features & Operation
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Spring Operating Mechanism: Equipped with a robust spring mechanism that supports stable opening and closing cycles.
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Visual Status Indicators: The front panel includes a counter, energy storage indicator, and clear manual trip/close buttons for safe on-site operation.
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Flexible Installation: While optimized as a handcart type for KYN28-24 cabinets, it can also be configured for fixed installation depending on the project requirements.
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