VBI-24 Indoor Side Mounted Vacuum Circuit Breaker with 3 Integrated Current Transformers (24kV)
The VBI-24 indoor side-mounted vacuum circuit breaker is designed for high-reliability control and protection in power grids with rated voltages up to 24kV. It features a space-saving side-mounted structure and comes equipped with 3 integrated current transformers for precise monitoring. Built for high-frequency operations, this unit fully meets automatic closing requirements and offers exceptional performance and a long service life in air-insulated indoor switchgear.
VBI-24 Indoor Side Mounted Vacuum Circuit Breaker (24kV)
Product Overview
The VBI-24 indoor medium-voltage sealed vacuum circuit breaker is an advanced protection and control unit designed for air-insulated indoor switchgear. Rated for power grids up to 24kV, this side-mounted breaker is engineered for frequent operations and high-reliability performance in demanding environments. It fully supports automatic reclosing requirements and offers a long, stable service life.
Advantages of Integrated Current Transformers
The VBI-24 stands out by integrating current transformers directly into its side-mounted design, offering several key benefits:
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Integrated Design: Simplifies installation and wiring while significantly reducing the required space and overall costs.
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Instant Response: Enables direct monitoring near the VCB breaker for faster fault detection and improved system protection accuracy.
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Reduced Interference: Minimizes signal attenuation in the transmission path for more precise measurements.
Key Technical Features
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Operating Mechanism: Utilizes a reliable spring energy storage mechanism that can be operated both manually and electrically.
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Standards Compliance: Fully compliant with GB1984-89, JB3855-96 (standard for <10kV indoor high-voltage VCBs), and relevant IEC56 standards.
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Versatile Pole Options: Available with insulating cylinders, epoxy resin embedded poles, or nylon embedded poles to suit specific installation needs.
Technical Specifications
| Item | Unit | Technical Data |
| Rated Voltage | kV | 24 |
| Power Frequency Withstand Voltage (1min) | kV | 65 |
| Rated Lightning Impulse Withstand Voltage | kV | 125 |
| Contact Opening Distance | mm | 12 ± 1 |
| Opening Time | ms | ≤ 50 |
| Closing Time | ms | ≤ 100 |
| Contact Closing Bounce Time | ms | ≤ 2 |
| Distance Between Phases | mm | 210 ± 1 |
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