Instrument for lightning arrester monitor test

Abstract

The invention provides an instrument for lightening arrester monitor test. The invention has the following key technology: synthesizing the current test function and a counting function into a circuit, the function is selected through a current / counting function selecting switch for respectively completing the current test and the counting function test; the current / counting function selecting switch is connected with a discharge counter triggering button through a charging resistor, a rectifier diode and a damping resistor, and is connected with a digital ammeter through a current limiting resistor and an adjustable resistor; two wires are used as the leading-out wires of the instrument for test according to the invention and are connected with two ends of the lightning arrester monitor. The instrument for lightening arrester monitor test according to the invention has the beneficial effects of simple design, convenient installation, capacity for testing the millammeter and the action counter of the lightning arrester monitor test. The peak current and the effective-value current can be switched freely according to the factory demand of the monitor. Action test can be executed to the action indicator of the monitor. The reliability of the lightning arrester monitor can be guaranteed effectively.

Description

technical field [0001] The present invention relates to a test instrument for electric power, which can complete all the tests required by the current regulations on monitors for lightning arresters. Background technique [0002] The arrester monitor, also known as the arrester leakage current and action recorder, is an instrument used in conjunction with the zinc oxide arrester in the high-voltage AC power system. The instrument is connected in series to the grounding circuit of the arrester. The monitoring ammeter in the monitor is used to monitor the leakage current (peak value) passing through the arrester under the operating voltage, and can judge whether the interior of the arrester is damp, whether the components are abnormal, etc.; the action counter records the number of overvoltage actions of the arrester. [0003] According to Article 21.0.5 of GB50150-2006 "Electrical Equipment Handover Test Standard for Electrical Installation Engineering", two tasks should be c...

AI Technical Summary

Problems solved by technology

However, the existing test instruments for arrester monitors can only complete the function of "checking the action performance of the discharge counter", and cannot complete the check of the arrester monitoring ammeter, that is to say, the reliability of the arrester monitor cannot be guaranteed. sex

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