A closing resistor structure for an arc extinguishing chamber of a circuit breaker

By adding a polytetrafluoroethylene inner sleeve, a soft metal sheet, and an aramid fiber support cylinder to the closing resistor structure of the circuit breaker arc-extinguishing chamber, the problem of breakage of the closing resistor under high impact conditions was solved, the strength and toughness of the resistor were improved, and the safe operation of the power grid was ensured.

CN224366803UActive Publication Date: 2026-06-16SHANGHAI SIEYUAN HIGH VOLTAGE SWITCHGEAR +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI SIEYUAN HIGH VOLTAGE SWITCHGEAR
Filing Date
2025-06-30
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Under high-impact conditions, the closing resistor is prone to breakage due to impact and vibration, affecting the circuit breaker performance and endangering the safe operation of the power grid.

⚗Method used

By adding a polytetrafluoroethylene inner sleeve between the insulating rod and the resistor sheet, placing a soft metal sheet between the resistor sheet and the support base, and attaching an aramid fiber support cylinder to the resistor string, combined with the design of a sealing ring and heat dissipation holes, the support and buffering of the resistor sheet are enhanced, reducing vibration and stress concentration.

🎯Benefits of technology

It effectively prevents resistor element breakage, improves the strength and toughness of the resistor element, ensures the safe operation of the power grid, avoids resistor element wear and powder contamination, and guarantees the stability and reliability of the circuit breaker.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to power transmission and transformation equipment field discloses a closing resistor structure for circuit breaker arc extinguishing chamber, including, two symmetrical support seat, insulating stick, its both ends are inserted into two symmetrical support seat respectively, polytetrafluoroethylene inner cover, its sleeve joint is on insulating stick, resistance string, by a plurality of resistance sheet is in series and is arranged along the axial direction of insulating stick and is formed, one end of resistance string is contacted with polytetrafluoroethylene inner cover, and the resistance sheet of both ends end portion of resistance string is connected with support seat respectively. Because the utility model passes through the polytetrafluoroethylene inner cover of installation between insulating stick and resistance string, can alleviate the collision between resistance sheet and insulating stick when vibrating, thereby avoiding the partial breakage of the inner hole edge of resistance sheet due to operation or transportation vibration, thereby improving product performance, ensuring the safe operation of power grid.
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