Import All Series Vacuum Interrupter — Buy in Bulk from Supplier in China

Yuyao Hengtong Electric Appliance Factory produces vacuum interrupters for medium-voltage circuit breaker applications, with this all-series line covering both indoor and outdoor installation environments. Vacuum interrupters extinguish electrical arcs in a sealed vacuum environment, eliminating the need for insulating oil or gas and enabling compact breaker designs. The ceramic or glass-ceramic envelope construction, with copper-chromium contact material, is standard for this product category. Rated voltage and current parameters vary across the series, though exact kV and ampere ratings for each catalogue number are not specified in the source data and must be requested from the supplier.

The contact material is typically a copper-chromium (CuCr) composite, chosen for its combination of low chopping current, high dielectric strength recovery, and resistance to contact erosion under repeated making and breaking operations. The vacuum envelope is evacuated to pressures below 10^-4 Pa, a standard requirement for reliable arc extinction. Bellows assemblies allow contact movement while maintaining vacuum integrity, with fatigue life measured in tens of thousands of mechanical operations. The all-series designation implies a range of ratings and physical mounting dimensions rather than a single specification, common for interrupter manufacturers who supply multiple original equipment breaker producers.

Primary applications include vacuum circuit breakers for power distribution networks, ring main units, and industrial switchgear. Buyers are typically switchgear manufacturers, electrical utilities, or large-scale infrastructure contractors specifying components for substation projects. The supplier states compliance with international standards, though no specific IEC, GB, or ANSI certification numbers are provided. Insulation co-ordination, short-circuit making and breaking capacity, and mechanical endurance data are critical selection parameters that require direct technical confirmation. Trade terms including FOB and CIF are referenced, but exact pricing, MOQ, and lead time are not available and must be negotiated directly with the factory.

Yuyao Hengtong Electric Appliance Factory is located at No.225, Huangniyan Road, Mazhu Town, Yuyao, Zhejiang Province, China. The supplier carries a harbour trust tier and an imported supplier tier classification. Its response rate is shown as 0.00 with zero average response hours, indicating no response activity is recorded in the available channel. The factory's address places it in the same Yuyao industrial zone as several plastics and electrical component manufacturers, though proximity does not confirm production scale or technical specialisation.

The company profile does not state year of establishment, factory floor area, number of employees, annual revenue, export markets served, or specific quality management system certifications. No client references, patent holdings, or research and development capabilities are mentioned. Buyers should request a factory audit, ISO 9001 certificate, and type test reports from an accredited laboratory before relying on this supplier for critical infrastructure components. The absence of stated certification numbers for ISO, CE, or SGS claims in the source material means these must be verified independently.