Catalogue · ROCKWILL

12kV, 17.5kV, 24kV available to 36kV Indoor Vacuum Circuit Breaker

Indoor metal-clad switchgear panels, urban and industrial substations, power plant auxiliary power system, mining power distribution, renewable energy booster stations, data centre and large infrastructure medium voltage power receiving and distribution.

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Updated2026.09

LanguageEnglish

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Document description

ROCKWILL Indoor Vacuum Circuit Breaker is indoor medium voltage switching apparatus for three-phase AC 50Hz power system, with available rated voltages of 12kV,17.5kV,24kV up to 36kV. It uses vacuum interrupter for arc quenching, featuring high breaking performance, low maintenance and SF₆-free design. The product complies with IEC 62271-1:2017 and IEC 62271-100:2020. Relevant documents include Type Test Certificate No. TT-2025-04160, Witness Test Report No. WT-2025-09093, Routine Factory Test Report No. FT-2025 series, Raw Material Mill Certificates, all issued by CNAS accredited independent high voltage test laboratory and available for tender submission, utility review and project site acceptance. Spring operating mechanism is standard, with optional handcart or fixed mounting version, auxiliary contacts and intelligent temperature & status monitoring modules, tropical anti-condensation treatment optional for high humidity indoor sites.

Frequently asked questions

What voltage grades are available for this Indoor Vacuum Circuit Breaker?

This indoor vacuum circuit breaker covers 12kV,17.5kV,24kV and up to 36kV rated voltage, users can select suitable voltage class according to actual distribution system requirements.

What arc extinguishing medium does this Indoor Vacuum Circuit Breaker adopt?

Vacuum interrupter is used for arc extinction. It does not require SF6 gas, reduces greenhouse gas risk, and requires minimal routine maintenance.

What installation types can be provided for this Indoor Vacuum Circuit Breaker?

Both withdrawable handcart type and fixed mounting type are available, compatible with different indoor switchgear cabinets such as KYN28 and KYN61.

What operating mechanism is equipped for this Indoor Vacuum Circuit Breaker?

Spring operating mechanism is adopted as standard. It delivers stable opening and closing performance, supports auto-reclose function and long mechanical service life.

What optional monitoring accessories can be fitted?

Auxiliary switches for position feedback, temperature sensors and communication modules are optional to upload breaker status and temperature data to substation SCADA system for remote monitoring.

12kV, 17.5kV, 24kV available to 36kV Indoor Vacuum Circuit Breaker

Document description

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Indoor Vacuum Circuit Breaker 12kV 17.5kV 24kV available to 36kV

Frequently asked questions