Test clamp meter with large check range

Abstract

The invention relates to a test clamp meter with a large check range. The test clamp meter with the large check range is composed of a test meter, a meter clamp and a test line, the meter clamp is connected with the test meter through the test line, the meter clamp is composed of a left clamp body, a right clamp body and a mounting rotary shaft, the left clamp body and the right clamp body are mounted through the mounting rotary shaft in an opening and closing mode, the upper portion of the left clamp body and the upper portion of the right clamp body form a closed test ring, and the inner diameter of the test ring is ranged from 120mm to 140mm. The test clamp meter with the large check range has the advantages of being scientific and reasonable in physical design, large in check range, capable of guaranteeing the accuracy and reliability of the operation of a metering device and high in safety coefficient. Further, the test clamp meter with the large check range has high innovation.

Description

technical field [0001] The invention relates to a calibration tool in the field of electric power, in particular to a testing clamp meter with a large calibration range. Background technique [0002] With the development of economy and society, the power consumption capacity of various power users continues to increase, especially the increase of high-supply and low-account large-capacity users, resulting in a large number of metering devices used for comprehensive error testing that do not meet the measurement requirements. [0003] According to the requirements of the technical management regulations of electric energy metering devices, meter installation inspectors must conduct on-site verification of electric energy metering devices, among which, the comprehensive error measurement of high-supply and low-meter metering devices is required. However, the existing clamp meter used for on-site verification test has a small inner diameter (the inner diameter is about 90mm), w...

AI Technical Summary

Problems solved by technology

However, the existing clamp meter used for on-site verification test has a small inner diameter (the inner diameter is about 90mm), which can only test the error of the electric energy meter for a small-capacity metering device, but cannot test the error of a large meter with a width exceeding 80mm. The metering device of the capacity busbar conducts the wiring inspection of the secondary circuit and the test of the comprehensive error, so that the accuracy and reliability of the metering device cannot be guaranteed

In addition, the test line on the clamp meter is relatively short, and the operator needs to be close to the live equipment to facilitate the measurement during measurement. This practice can easily lead to safety accidents such as electric shock

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