Calibrating device for grounding connection parameter testing systems

Abstract

The invention discloses a calibrating device for grounding connection parameter testing systems. The calibrating device comprises a case, an interference signal simulation module display (3), a loop impedance simulation module display (5), an impedance standard display (7) and an adjustable frequency standard signal source display (14) which are mounted on the case are respectively connected with an interference signal simulation module (2), a loop impedance simulation module (4), an impedance standard (6) and an adjustable frequency standard signal source (13) in the case, a current loop input interface terminal (1), a current loop output interface terminal (9), a first calibrating device sampled voltage interface terminal (11) and a calibrating device sampled voltage interface terminal (12) are arranged on the case, and thereby the calibrating device is formed. The impedance standard is embedded in the calibrating device, real-time frequency, current and voltage values are acquired, and a standard impedance value is compared with the impedance value displayed by a tested system in order to determine the accuracy of the tested system.

Description

technical field [0001] The present invention relates to a verification device, in particular to a verification device for a grounding device characteristic parameter testing system, relating to the verification of the grounding device characteristic parameter testing system in electric power systems, meteorological systems, and large-scale factories and mines, including a frequency-selective voltage ammeter and a relay protection tester Verification and calibration of the accuracy of power measuring instruments such as AC and DC indicating instruments and electric energy meters. Background technique [0002] As we all know, the characteristic parameters of grounding devices in power systems, meteorological systems, and large-scale factories and mines include power frequency characteristic parameters such as grounding impedance, electrical integrity, contact voltage, and field surface potential gradient. Unsafe conditions can be found in time through the grounding device chara...

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Problems solved by technology

[0003] However, due to the high frequency of use of the grounding device characteristic parameter test system, the poor use environment, and the influence of factors such as the life of electronic devices and the aging of mechanical devices, the accuracy and safety performance of the system will be reduced, and there are uncertain safety hazards; in addition, The test system is composed of different components, and its manufacturers are distributed all over the country, even all over the world. It is extremely inconvenient to return to the factory for calibration, and it is impossible for the user to purchase various verification devices in different categories.

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