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Self-energized thermal expansion type SF6 arc-extinguishing chamber of circuit breaker

A technology of sulfur hexafluoride and thermal expansion, which is applied in the field of arc extinguishing chambers, can solve the problems of unstable energy of circuit breakers and affect the reliability of operation, and achieve the effects of energy stability, high motion reliability, and low requirements

Inactive Publication Date: 2002-11-13
NINGBO TIANAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Make the energy provided by the circuit breaker unstable and affect the reliability of operation

Method used

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  • Self-energized thermal expansion type SF6 arc-extinguishing chamber of circuit breaker
  • Self-energized thermal expansion type SF6 arc-extinguishing chamber of circuit breaker
  • Self-energized thermal expansion type SF6 arc-extinguishing chamber of circuit breaker

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Embodiment Construction

[0024] The present invention will be described in detail again in conjunction with the above-mentioned embodiments of the accompanying drawings.

[0025] Referring to Figure 1-3, the thermal expansion self-energy type sulfur hexafluoride circuit breaker arc extinguishing chamber is installed in the insulating tube, one end is a static contact mechanism, and the other end is a movable movable contact mechanism, which is a coaxial rotary structure. The moving contact mechanism is operated by the spring operating mechanism to form two sets of contacts with sequential breaking sequence and closing sequence to ensure that the arc burns between the designated contacts.

[0026] The static contact mechanism includes relatively fixed static main contacts 1 and static arc contacts 2, which are equipotential during breaking or closing. The moving contact mechanism includes an arc extinguishing nozzle 3 with variable inner diameter and small diameter, a moving main contact 6, and a movin...

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PUM

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Abstract

A self-energizing thermal-expansion SF6 arc-extinguishing chamber for circuit breaker is composed of static contact mechanism, dynamic contact mechanism and arc-extinguishing chamber consisting of cylinder, piston and gas chamber. It features that the downstream throat of small-diameter arc-extinguishing nozzle has a structure with dual expanding angles and dual guides, and its gas chamber includes thermal expansion chamber and gas compression chamber. Its advantage is that load current does not affect the on-off operation.

Description

technical field [0001] The invention relates to a high-voltage switchgear, in particular to an arc extinguishing chamber for controlling and maintaining a high-voltage sulfur hexafluoride circuit breaker in a power system. Background technique [0002] Sulfur hexafluoride circuit breakers with a voltage level of 35KV and above are one of the key actuators widely used in power systems. Their functions are to allocate power system energy, eliminate faults, and ensure safe and reliable operation of the power system. Sulfur hexafluoride gas is widely used in the high-voltage electrical appliance manufacturing industry because of its extraordinary insulating properties and excellent arc-extinguishing ability. The working principle of the early sulfur hexafluoride circuit breaker comes from the compressed air circuit breaker. After nearly half a century of research and development, it has matured into a compressed sulfur hexafluoride gas composed of a cylinder and a piston to perf...

Claims

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Application Information

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IPC IPC(8): H01H33/74
Inventor 龚晨
Owner NINGBO TIANAN GRP CO LTD
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