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Large-range AC current testing device

A technology of current test and alternating current, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of lack of verification devices, the influence of measurement supervision work, and the inability to fully carry out verification work, etc., to achieve timely and reliable response, good stability, The effect of improving stability

Inactive Publication Date: 2015-11-25
CHAOYANG POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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Problems solved by technology

[0002] According to the "National Electrical Testing Instrument Verification Regulations", the calibration device of the large-scale standard ammeter should have basic functions such as large current range, stable output, and high precision. The work cannot be carried out in an all-round way, which has a certain degree of impact on the measurement supervision work

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the present invention is not limited to the following embodiments.

[0015] See figure 1 , a large-range AC current test device, including a standard ammeter A, a single-phase AC stabilized power supply WY, an autovoltage regulator ZL, a current booster LK, a range switch, a step-down transformer B, and a standard current transformer LH, The input terminal of the step-down transformer B is connected to the 220V AC mains through a knife switch, the input terminal of the auto-coupling voltage regulator ZL is connected to the secondary side of the step-down transformer B, and the auto-coupling voltage regulator ZL is connected to the current booster (including the current transformer 1LK, Current transformer 2LK, isolation transformer SL), multi-level taps on the secondary side of the current booster are connected to...

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Abstract

The invention relates to a large-range AC current testing device, which comprises a standard ammeter, a single-phase AC voltage-stabilizing power supply, a self-coupling voltage regulator, a current rising device, a range switching switch, a step-down transformer, and a standard current transformer, wherein the input end of the step-down transformer is connected with 220V AC mains supply; the input end of the self-coupling voltage regulator is connected with the secondary side of the step-down transformer; the self-coupling voltage regulator is connected with the current rising device; a multistage tap at the secondary side of the current rising device is connected with the range switching switch and is serially connected with the standard current transformer via the range switching switch; the secondary side of the standard current transformer is connected with the standard ammeter; and the range switching switch is connected with a tested ammeter. The large-range AC current testing device has the advantages that through the range switching switch with 15 gears, large-current standard meters less than 100A can be tested; through the self-coupling voltage regulator and the step-down transformer, stability is improved; and operability is good, measurement is accurate, the output precision is high, stability is good, and the protection device can respond timely and reliably.

Description

technical field [0001] The invention relates to a large-range alternating current test device, in particular to a 0.015-100A alternating current test device. Background technique [0002] According to the "National Electrical Testing Instrument Verification Regulations", the calibration device of the large-scale standard ammeter should have basic functions such as large current range, stable output, and high precision. The work cannot be carried out in an all-round way, which has a certain degree of impact on the measurement supervision work. [0003] The verification device needs to meet: [0004] 1. Meet the test requirements of 0.1 / 0.5 class large-range ammeter; [0005] 2. Verification of single-range and multi-range (0.015~100A) ammeters. Contents of the invention [0006] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a large-range alternating current test device, which is suitable for testing single-range...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
Inventor 张文张震亚刘守林邢维国魏兴钱明伟刘凤珍
Owner CHAOYANG POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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