Transformer neutral point earth protection device

A technology for neutral point and grounding protection of transformers, applied in emergency protection circuit devices, measuring devices, instruments, etc., can solve problems such as the inability to monitor the stable operation of the working signal power system, and achieve the effect of strong adaptability

Inactive Publication Date: 2011-05-18
XIAN SHENDIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a transformer neutral point grounding protection device with a monitoring function to solve the problem that the exist...

Method used

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  • Transformer neutral point earth protection device
  • Transformer neutral point earth protection device

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Embodiment Construction

[0013] Specific embodiments of the present invention such as figure 1 Shown:

[0014] The transformer neutral point grounding protection device includes a discharge gap 1, a grounding switch 2 connected in parallel with the discharge gap 1, an arrester 3 connected in parallel with the discharge gap 1, and the grounding switch 2 and the arrester 3 are connected in parallel; the discharge gap 1, the grounding switch 2, and the arrester 3 The node at one end of the parallel connection is connected to the neutral point 4 of the transformer, and the other end of the node is the grounding point 5; between the discharge gap 1 and the grounding point 5, there are discharge counters 6 and current transformers 7 in series; between the arrester 3 and the grounding point 5 A first on-line monitor 8 is connected in series; a switch contact temperature monitor 21 is installed on the grounding switch 2;

[0015] When working, the discharge counter 6 monitors the action of the discharge gap;...

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PUM

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Abstract

The invention provides an online detection transformer neutral point earth protection device. Various signals in the work of the transformer neutral point earth device can be monitored in real time; and various problems occurring during the operation of a system can be effectively processed in time according to the signals provided by a monitoring device so that the management personnel can conveniently judge the equipment operation conditions. The transformer neutral point earth device is guaranteed to operate in safe and reliable conditions. The monitor of the transformer neutral point earth device can still operate normally in humid climate and has strong adaptability to climate.

Description

technical field [0001] The invention relates to a transformer neutral point grounding protection device, in particular to a transformer neutral point grounding protection device with a monitoring function. Background technique [0002] In a star-connected three-phase circuit, the point where the three coils (or windings) are connected together is called the neutral point. The wire drawn from the neutral point is called the neutral wire. The neutral point of the power system refers to the connection symmetry point and voltage balance point of each phase of the power equipment (such as generators, transformers, etc.) whose windings or coils are star-connected in the three-phase power system, and its ground potential is normal in the power system. Runtime is zero or close to zero. The neutral point grounding of the power system is a kind of working grounding, which ensures that the power equipment and the entire power system have proper operating conditions under normal and f...

Claims

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Application Information

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IPC IPC(8): H02H7/04G01R31/02G01R19/17
Inventor 叶德平杨筱安
Owner XIAN SHENDIAN ELECTRONICS
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