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Access transformer type equipment short-circuit pre-detection protection device and working method thereof

A technology of protection devices and transformers, which is applied in the field of circuits, can solve problems such as danger, equipment and user injury risks, and failure to detect cut-off power supplies in time, so as to achieve the effect of ensuring safety and personnel safety

Pending Publication Date: 2020-04-17
CHENGDU UNIV OF INFORMATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing transformer-type equipment has no pre-use detection steps during power supply. If there is a fault, it is very dangerous to directly open the equipment and cause damage to the equipment and users.
Moreover, if the fault occurs during the use after power-on, it is also very dangerous if the cut-off power supply cannot be found in time.

Method used

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  • Access transformer type equipment short-circuit pre-detection protection device and working method thereof
  • Access transformer type equipment short-circuit pre-detection protection device and working method thereof
  • Access transformer type equipment short-circuit pre-detection protection device and working method thereof

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Embodiment Construction

[0047] Attached below Figure 1~3 The present invention will be further described in detail with reference to specific embodiments. But this should not be interpreted as the scope of the above-mentioned theme of the present invention is limited to the following embodiments, all based on the content of the present invention to achieve

[0048] The short-circuit pre-check protection device for accessing transformer-type equipment in the present invention includes a main power circuit, a logic judgment circuit, a current detection circuit, a switch control circuit, an alarm circuit, and a cut-off circuit.

[0049] 1. Main power circuit

[0050] The main power circuit is connected with the mains AC power supply and DC power supply, including the first two-way relay, the second two-way relay, and the isolation transformer that are initially located at the normally closed end. The first dual-circuit relay and the second dual-circuit relay are kept normally closed when a short-circ...

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PUM

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Abstract

The invention relates to an access transformer type equipment short-circuit pre-detection protection device and a working method thereof. The device comprises a main power circuit, a logic judgment circuit, a switch control circuit, an alarm circuit and a cut-off circuit. According to the invention, the equipment with the transformer can be detected before startup each time, if a fault occurs, analarm is sent out immediately and pre-protection is provided, detection is carried out again after the fault is eliminated, and the equipment can be started only after the detection is passed, so thatthe safe operation of the equipment and the personnel safety are guaranteed. Power supply is cut off in time under the condition of short circuit in the equipment operation process, and safety is guaranteed for the second time.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to a short-circuit pre-inspection protection device connected to transformer-type equipment and a working method thereof. Background technique [0002] Existing transformer-type equipment does not have a pre-use detection step during power supply. If there is a fault, it is very dangerous to directly open the equipment and cause damage to the equipment and users. Moreover, if the fault occurs during the use after power-on, it is also very dangerous if the cut-off power supply cannot be found in time. [0003] Therefore, it is necessary to provide a technical solution that can detect the equipment before and during power-on, and cut off the power supply in time after a fault is found, which will eliminate the risk of leakage, which is very meaningful. Contents of the invention [0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/04
CPCH02H7/04
Inventor 李珂杨琇雯王海时金玥林英豪胡双陈昌明羊裔高
Owner CHENGDU UNIV OF INFORMATION TECH
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