Silverstone supplies indoor and outdoor vacuum circuit breakers for medium-voltage distribution — VS1 and VSSE series withdrawable or fixed units for switchgear panels, and ZW32 / ZW20 pole-mounted breakers for overhead line switching and auto-reclosing duty. Vacuum interrupters with longitudinal magnetic-field arc extinction, spring operating mechanisms and epoxy-resin or silicone-rubber insulation — configured to your single-line diagram and delivered with routine test reports.
Key Specifications
Product class
AC high-voltage vacuum circuit breaker — indoor & outdoor
20 / 25 / 31.5 / 40 kA (indoor) · 20 / 25 kA (outdoor)
Mechanical life
10,000 operations (VS1 up to 60,000)
Operating mechanism
Spring charged — manual or motor driven
Reference standard
IEC 62271-100 (GB 1984 / DL 403)
Sourcing base
Suzhou Industrial Park, Jiangsu, China
Typical configurations shown. Final ratings, dimensions and test reports are confirmed per project datasheet — include your specification with the inquiry. Download brochure (PDF) →
Typical Applications
Indoor MV switchgearUtility distribution networksPole-mounted line switching & reclosingIndustrial plants — metallurgy, petrochemicalRural electrification
Frequently Asked Questions
What information do you need to quote a vacuum circuit breaker?
Indoor or outdoor duty, rated voltage, rated current, short-circuit breaking current, fixed or withdrawable type, operating voltage of the coils and motor, and options such as disconnector, current transformers or controller. Add quantity and destination port and we return a priced offer within 24 hours on working days.
Which standards do your vacuum circuit breakers comply with?
The breakers we supply are designed and type-tested to IEC 62271-100 (and corresponding GB 1984 / DL 403 requirements). Routine test reports ship with every unit; type test certificates for specific ratings are available on request.
Do you support OEM or project-specific configurations?
Yes. OEM branding, custom ratings, CT ratios, controller functions and documentation packages are part of our sourcing service for bidding agents and EPC contractors.
Can you supply breakers together with switchgear or a complete substation?
Yes. We supply breakers loose or integrated in MV switchgear line-ups, and Silverstone delivers turnkey substation EPC — breakers, transformers, arresters and civil/electrical works under one contract. See our EPC service page.
