Indoor Vacuum Circuit Breaker for Safe and Compact Power Distribution
The Indoor Vacuum Circuit Breaker is a reliable solution for medium-voltage systems in indoor environments like industrial switchgear and utility substations. It ensures quick arc suppression and electrical safety.
Designed for compact installation, our indoor VCB supports both fixed and withdrawable configurations, and fits seamlessly into panels such as KYN28 and XGN15.
Fully tested to IEC 62271-100 and GB 1984 standards, it offers dependable protection with minimal maintenance—perfect for high-performance indoor networks.
Frequently Asked Questions
🏢 Where is an indoor vacuum circuit breaker typically used?
It is used in indoor switchgear panels for medium-voltage power distribution in factories, data centers, and commercial buildings.
🔌 What are the typical voltage ratings?
Most indoor VCBs are rated at 12kV or 24kV, suitable for 50Hz/60Hz networks with up to 31.5kA breaking capacity.
🔧 Can the breaker be racked in and out?
Yes. Drawout-type VCBs can be racked in and out of switchgear cubicles for maintenance and safety checks.
🛠️ How often does an indoor VCB need maintenance?
Thanks to vacuum technology, maintenance is minimal—typically every 5 to 10 years depending on usage.
📋 What standards should it comply with?
IEC 62271-100 and GB 1984 are the core international and Chinese standards for indoor vacuum breakers.