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Laboratory AC/DC power supply short-circuit protection device

A technology of AC and DC power supply and short circuit protection, applied in the field of power supply, to achieve the effect of saving the cost of experiment and training, improving the ability of innovation, rapid detection and maintenance

Active Publication Date: 2016-11-09
HUAIAN COLLEGE OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a short-circuit protection device for laboratory AC and DC power supplies. The present invention effectively solves the need to frequently replace the fuse core when the load is short-circuited in the traditional experimental training process, which makes the teaching efficiency low, and the fuse The accompanying phenomenon in the process of melting core burning can easily cause students to have a fear of debugging projects, which is not conducive to the study of students' professional courses and the improvement of practical skills, and hinders the cultivation of students' innovative thinking

Method used

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  • Laboratory AC/DC power supply short-circuit protection device

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Embodiment Construction

[0036] Such as figure 1 As shown, the present invention includes a power supply 1, a fuse 2, a button, an intermediate relay, a resistor, a light-emitting diode and a load 18; the power supply 1 is an AC power supply or a DC power supply provided by an experimental training device; the fuse 2 is To prevent the device from being used for a long time, the contact of the intermediate relay does not act quickly and short-circuit the power supply; the buttons include a short-circuit protection reset button SB1 3, a short-circuit protection device output power start button SB2 10, and a protection device performance test button SB3 17; The relay includes cut-off load power intermediate relay KA1 when load short-circuit occurs, short-circuit action intermediate relay KA2, power output intermediate relay KA3, cut-off load power intermediate relay KA1 includes coil (5), normally open contact (6), normally closed contact ( 16), the short-circuit action intermediate relay KA2 includes a ...

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Abstract

The invention discloses a laboratory AC / DC power supply short-circuit protection device which is characterized in that the protection device is arranged between a power supply (1) and a load (18), and is composed of a fuse (2), an intermediate relay, a light-emitting diode, a resistor and a button which are in series-parallel connection. In the traditional process of experimental training, there is a need to frequently replace the fusible core of the fuse under the short-circuit condition of the load, which results in low teaching efficiency. What is worse, phenomena produced in the burning process of the fusible core of the fuse easily make students terrified of the debugging project, are not conducive to students' learning of specialized courses and improvement of practical skills, and hinder the cultivation of students' innovative thinking. With the device, the problems are solved effectively.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a short-circuit protection device for laboratory AC and DC power supplies. Background technique [0002] At present, many colleges and universities, especially higher vocational colleges, have invested a lot of equipment to improve students' practical operation skills. In the experimental training projects of many professional courses in electrical automation, mechatronics, etc. Called load) the voltage level is mostly AC 220V or DC 24V, and fuses are generally used as power short-circuit protection components. Although this protection method is simple and effective, it protects the power supply by burning the melting core of the fuse when the load is short-circuited. To restore the power supply, the fusing core of the fuse must be replaced, which is wasteful and troublesome. At the same time, the following phenomena will be accompanied by short circuit: explosion, smoke...

Claims

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Application Information

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IPC IPC(8): H02H3/08H02H3/04
CPCH02H3/04H02H3/08
Inventor 侍寿永居海清夏路兵薛云星杨昊程丽郭宇凡
Owner HUAIAN COLLEGE OF INFORMATION TECH
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