A traction rod inter-pole insulation structure of a circuit breaker and a circuit breaker

CN224501843UActive Publication Date: 2026-07-14XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
Filing Date
2025-06-27
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing photovoltaic-storage integrated systems with large-pitch DC circuit breakers are prone to insulation breakdown during reverse-connection wiring, posing an explosion risk.

Method used

Multiple concave-convex mating insulation structures are installed between the base and cover of the circuit breaker. Through the cooperation of the first and second inter-pole flanges with the corresponding inter-pole spacers, a meandering electrical clearance route is formed, increasing the inter-pole electrical clearance and creepage distance.

Benefits of technology

It effectively prevents the direct transfer of electric arc from causing insulation breakdown during breaking, ensures stable and reliable breaking of the product under high voltage, prevents short circuits in the inter-pole trip unit, and guarantees the safety and reliability of the circuit breaker system.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224501843U_ABST
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Abstract

The utility model discloses a traction rod interelectrode insulation structure of circuit breaker and circuit breaker, including base, install in the traction rod of base and with the cover of base intercoordination, be provided with multiple concave-convex cooperation insulation structure between base and cover, through multiple concave-convex cooperation insulation structure increase traction rod interelectrode electrical clearance and creepage distance. The multiple concave-convex cooperation insulation structure of utility model is configured to be able to produce sinuous cooperation clearance and effectively increase traction rod interelectrode electrical clearance and creepage distance, and prevent arc direct transfer causes the breakdown insulation breakdown, effectively prevent hot state free gas under high voltage causes interelectrode release device short circuit.
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