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Transfer type grounding arc suppression device

A grounding device, transfer type technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. , to avoid loss, the effect of small size

Inactive Publication Date: 2019-05-24
TIANJIN PINGGAO INTELLIGENT ELECTRIC +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a transfer type grounding arc suppression device to solve the problem that the opening speed of the existing single circuit breaker scheme cannot meet the requirements after the normal phase is closed and grounded due to a short circuit between phases due to misjudgment

Method used

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  • Transfer type grounding arc suppression device
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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 The system structure diagram of a transfer type grounding arc suppression device is shown, including three-phase busbar 1, intelligent grounding controller 2, phase-separated control vacuum circuit breaker 3, single-phase quick-break circuit breaker 4, grounding device 5, zero-sequence mutual inductance Device 6, electronic voltage transformer 7, overvoltage protector 8. The electronic voltage transformer 7 is connected to the three-phase bus 1 in phases, the overvoltage protector 8 is connected in parallel with the electronic voltage transformer 7, and the electronic voltage transformer 7 is also Connected to the intelligent grounding controller 2, one side of the phase-splitting control vacuum circuit breaker 3 is connected to the three-phase bus 1 in phases, and the other side of the phase-separation control vacuum circuit breaker ...

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Abstract

The invention relates to a transfer type grounding arc suppression device. On the basis of the existing grounding arc suppression device, a single-phase quick circuit breaker is added between a split-phase circuit breaker and the ground. In the case of a single-phase short circuit to ground, if a fault phase is judged wrongly and a normal phase is metal-grounded to cause an inter-phase short circuit, the metal grounding of the normal phase can be disconnected quickly to avoid accidents. In addition, the transfer type grounding arc suppression device adopts a magnetic mechanism vacuum circuit breaker and has the advantages of long mechanical life, small volume and difficult demagnetization. An electronic voltage transformer is also adopted, which avoids the hidden danger of ferromagnetic resonance.

Description

technical field [0001] The invention relates to a transfer type grounding arc suppression device, which belongs to the technical field of circuit protection. Background technique [0002] Most of my country's current medium-voltage distribution network adopts a low-current grounding system, which is prone to arcing grounding. Single-phase intermittent arc-to-ground faults will cause various overvoltages. If the system continues to operate under overvoltages, it will inevitably cause the accumulation of grid insulation damage, and then cause severe accidents such as phase-to-phase short circuits. The arc light grounding overvoltage will excite the ferromagnetic resonance of the ferromagnetic voltage transformer, resulting in severe overload or even burning of the voltage transformer. According to the operation characteristics of the small current grounding system, the arc suppression device can transfer the arc grounding fault of the power grid, effectively suppress various ...

Claims

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Application Information

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IPC IPC(8): H02H9/08H02H3/16
Inventor 柳俊岗王子驰张军孙红娟柴娜周银锋薛文斌崔秋莲
Owner TIANJIN PINGGAO INTELLIGENT ELECTRIC
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