Vacuum Circuit Breaker Manufacturer in China

XIAOPAI - Wenzhou Xiaopai Electric Power Technology Co., Ltd. - manufactures the ZN85-40.5, ZW32-12/24, VSG-12 and VF2-12 vacuum circuit breakers in Wenzhou, Zhejiang. A vacuum circuit breaker interrupts fault current inside a vacuum interrupter, with no oil and no SF6, so maintenance stays minimal. That single choice of interrupting medium is what makes the VCB the default protection device on 12-40.5 kV networks.

1. THE MODEL RANGE

The range splits by installation rather than by a single spec sheet. The ZN85-40.5 is an indoor withdrawable VCB rated 40.5 kV for substations, power plants and mining. The ZW32-12 and ZW32-24 are outdoor pole-mounted VCBs for rural and suburban distribution and overhead line protection - their sealed outdoor enclosure resists rain, dust and condensation, and the integrated current transformers support protection and metering. The VSG-12 is built for compact switchgear integration where panel depth is limited, and the VF2-12 uses a modular design so the same breaker frame fits several cubicle layouts. Both are rated 12 kV for industrial plant distribution, commercial building substations and infrastructure projects.

2. THE PARAMETERS THAT MATTER

The technical parameters are what a buyer matches to a project specification: rated voltage 12 / 24 / 40.5 kV, rated frequency 50/60 Hz, three-phase, to IEC 62271-100, with a mechanical life above 10,000 operations. Installation is indoor withdrawable, indoor fixed or outdoor pole-mounted, and every model carries CE marking and is made under an ISO 9001 certified quality system. Where vacuum interruption sits among the main circuit breaker types is set out at Main circuit breaker types.

3. VCB vs LOAD BREAK SWITCH

A vacuum circuit breaker and a load break switch are not interchangeable. The VCB interrupts both load current and short-circuit current directly, and is reusable after a fault - just reclose. A load break switch handles load current and relies on a fuse for fault interruption, and the fuse must be replaced after a fault. The typical VCB rating is 12-40.5 kV, and the deciding question is whether a fault must be cleared and the network reclosed without replacing parts.

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4. FACTORY TESTS AND DOCUMENTS

XIAOPAI proves each unit before it leaves the floor. Every VCB is issued a routine test report per IEC 62271-100, a type test report is available on request per model, and factory acceptance testing runs before dispatch, with third-party inspection on request. Units ship in seaworthy crating with a moisture barrier, FOB Ningbo or Shanghai. The timing tests that verify opening and closing behaviour are shown at Timing Test for Vacuum Circuit Breaker.

5. ONE POINT OF CONTACT

XIAOPAI is the manufacturer, supplier and system integrator for the vacuum circuit breaker line, and the single point of contact after delivery, coordinating technical support and spare parts with the manufacturing side. See the vacuum circuit breaker page and the high-voltage switchgear page for the full specifications, quality checks and export notes.