Grounded resistance measuring apparatus

A measuring device and a technology of grounding resistance, which are applied in the field of grounding resistance measuring devices, can solve problems such as measurement errors, different readings, cumbersome operations, etc., achieve accurate measurement results, avoid measurement errors, and have simple measurement methods
CN1584610AInactive Publication Date: 2005-02-23STATE GRID CORP OF CHINA +3
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2005-02-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

A measuring device which uses two linked switches to carry out detection for measuring device is featured as carrying out stray current and stray voltage measurement of the earth to have accurate measuring result for earthing resistance, carrying out detection for connection state of resistance measuring device to earthing electrode to avoid measurement error caused by break point in connection.
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Description

technical field

[0001] The invention relates to a ground resistance measuring device, in particular to a ground resistance measuring device. Background technique

[0002] Such as figure 1 As shown, the grounding resistance measurement device in the prior art includes a current measurement circuit and a voltage measurement circuit. The current measurement circuit includes a power supply V1, a switch K1, an ammeter A, and current ground terminals C1 and C2. It starts from the power supply V1 and passes through the switch K1. , ammeter A, current grounding terminal C1, earth F, current grounding terminal C2, and finally return to the power supply V1 to form a current loop; the voltage measurement loop includes power supply V2, double switching switches K2, K3, variable resistor R, voltmeter V , Voltage grounding terminals P1 and P2, wherein the fixed terminals of the double switching switches K2 and K3 are both 0 terminals.

[0003] When preparing for the measurement, there i...

Claims

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