Direct-current low-voltage tester

A DC low-voltage, tester technology, applied in the direction of instruments, measuring devices, measuring electricity, etc., to achieve the effect of simple operation, good versatility, and guarantee of personal safety

Active Publication Date: 2014-03-19
HEBI POWER SUPPLY OF HENAN ELECTRIC POWERCORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of DC high-voltage testers, especially in the new construction of power systems, renovation projects and secondary circuit work, there are complex control circuits and high requirements for withstand voltage of components, so the application of DC high-voltage testers is subject to certain restrictions.

Method used

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Embodiment Construction

[0018] Below with embodiment in conjunction with accompanying drawing, the present invention is described in further detail:

[0019] Such as figure 1 , figure 2 As shown, the present invention includes a power supply circuit, a charging control circuit and an output circuit. The power supply circuit includes three sets of batteries and sliding resistor R1. The first set of batteries in the power supply circuit is a combination of dry batteries; The positive pole of the battery is connected to the negative pole of the second battery pack, and the capacitor is connected in parallel to the two poles of the total battery pack. The positive terminal of the first battery U1 is connected to the terminal P1 of the charging control circuit and the sliding resistor R1, and the negative terminal of the battery U1 is respectively connected to the terminal P2 of the charging control circuit and the positive terminal of the second battery U2. The lead-out line of the negative pole of ...

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Abstract

The invention discloses a direct-current low-voltage tester. The direct-current low-voltage tester includes a power supply circuit, a charging control circuit and an output circuit; the power supply circuit comprises more than two packs of batteries and a sliding resistor R1; positive pole lead-out lines of the more than two packs of batteries are respectively connected with the charging control circuit; one end of the sliding resistor R1 is connected with a positive pole lead-out line of the power supply circuit; and the other end of the sliding resistor R1 is connected with the output circuit. With the direct-current low-voltage tester of the invention adopted, defects in the prior art can be eliminated. The direct-current low-voltage tester can not only used for check and analysis of a secondary loop, and can be also used for cable core line check, CT polarity correction and the like, and is convenient to operate.

Description

technical field [0001] The invention relates to the field of relay protection of power systems, in particular to a DC low-voltage tester. Background technique [0002] The existing secondary circuit inspection adopts multimeter equipment, which is an indispensable measuring instrument in the field of power electronics. Generally, the main purpose is to measure DC current, DC voltage, AC current, AC voltage, resistance and audio level. The use of the multimeter in the secondary circuit inspection is prone to misjudgment, and the phase sequence and polarity of the line cannot be intuitively judged. At the same time, the multimeter needs an external cable for long-distance testing. The operation is complicated, and it is easy to accidentally touch it and cause personal injury. The multimeter has a dead zone for quickly and effectively solving the work of CT polarity and cable core check. [0003] The DC tester is mainly suitable for the power department of the power departmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
Inventor 李振计郝建刚刘洋刘琦徐艳强张宸铭佟建伟马东方
Owner HEBI POWER SUPPLY OF HENAN ELECTRIC POWERCORP
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