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Isolation circuit for low voltage power supply

An isolation circuit, low-voltage power supply technology, applied in the direction of conversion equipment such as intermediate conversion to DC conversion, can solve the problems of easy access, affecting the stable operation of low-voltage power supply, endangering personal safety and equipment safety, etc., to ensure stable operation.

Active Publication Date: 2016-10-19
GUANGZHOU POWER SUPPLY CO LTD +1
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

Since the low-voltage power supply is used to supply power to the electrical equipment in the high-voltage area, once the high-voltage power of other surrounding devices in the high-voltage area leaks, it is easy to enter the low-voltage power supply, which will not only affect the stable operation of the low-voltage power supply, but also directly endanger personal safety and health. device security

Method used

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  • Isolation circuit for low voltage power supply
  • Isolation circuit for low voltage power supply
  • Isolation circuit for low voltage power supply

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Embodiment Construction

[0013] The specific implementation of the isolation circuit of the low-voltage power supply of the present invention will be described in detail below with reference to the accompanying drawings.

[0014] Such as figure 1 As shown, an isolation circuit for a low-voltage power supply includes an isolation switch 120 connected to a low-voltage power supply 110, a high-isolation voltage transformer 130, a single-phase uncontrollable rectifier bridge 140, and a high-voltage isolation power supply 150. The high-voltage isolation power supply 150 outputs The terminal is connected to the electrical equipment 160 in the high voltage area, where the isolation switch 120, the high isolation voltage transformer 130 and the single-phase uncontrollable rectifier bridge 130 are located in the low voltage area, and the high voltage isolation power supply 150 is located in the high voltage area.

[0015] The electrical energy of the low-voltage power supply 110 enters the high-isolation voltage tra...

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Abstract

An isolation circuit for a low-voltage power supply, comprising an isolation switch connected to the low-voltage power supply in sequence, a high-isolation voltage transformer, a single-phase uncontrollable rectifier bridge and a high-voltage isolation power supply, wherein the output end of the high-voltage isolation power supply is connected to electrical equipment in a high-voltage area . The invention forms an isolation circuit by connecting an isolation switch and a three-level isolation circuit, which can isolate the low-voltage power supply from the high-potential area, prevent the high-voltage power from entering the low-voltage power supply, and effectively ensure the stable operation of the low-voltage power supply and the safety of persons and equipment.

Description

Technical field [0001] The invention relates to the technical field of isolation circuits, in particular to an isolation circuit of a low-voltage power supply. Background technique [0002] The fault recorder is used in the power system. When the system fails, it can automatically and accurately record the changes of various electrical quantities before and after the failure. By analyzing and comparing these electrical quantities, the accident can be analyzed and handled, and protection can be judged. Whether the operation is correct, etc., play an important role in improving the safe operation of the power system. [0003] The independent fault recorder is based on the distributed architecture and network transmission technology of the existing fault recorder, and further proposes the distributed architecture of the collection point and the optical fiber synchronization transmission of the collected data, which can reduce the maintenance difficulty of the fault recorder and reduce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/44
Inventor 江文东徐强超何小龙张佳丽王彤
Owner GUANGZHOU POWER SUPPLY CO LTD
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