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Traceable technique to calibrate current coils for calibration of the power clamp meters in AC current range up to 1000 A

机译：可追溯技术来校准电流线圈，用于校准AC电流范围内的功率钳位仪，高达1000a

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摘要

Power clamp meters are designed to check electricity meters, instrument transformers and installations on site. A measurement technique which is used to calibrate current coils for calibration of power clamp meters in AC current range from 5 to 1000 A has been developed. This technique allows one to measure two parameters of current coils that are needed for calibration of power clamp meters, they are the amplitude coil effect and the proposed phase coil effect. This is the first study of phase coil effect. There is presented the calibration procedure and an example solution of a fully automatic calibration system which employs the three phase Power/Energy Calibrator from Poland, which is traceable to the national standards. Calibration uncertainty of current coils, with reference to a power calibrator and measurement results, is discussed. The best expanded uncertainty (k = 2) of this technique equals 0.03% for amplitude coil effect and it equals 0.14 degrees for phase coil effect. The expanded uncertainty for phase coil effect equal 0.14 degrees gives expanded uncertainty for active power equal 0.42% at PF = 0.5 for calibration of power clamp meters. The result is that the power clamp meters specified accuracy (0.40%) has almost the same value as the power error due to the influence of phase coil effect (0.42%). (C) 2017 Elsevier Ltd. All rights reserved.
机译：电源钳位仪表旨在检查现场电表，仪表变压器和安装。已经开发了一种测量技术，用于校准用于校准用于校准的AC电流范围为5至1000a的电力钳位。该技术允许人们测量校准功率钳表校准所需的电流线圈的两个参数，它们是幅度线圈效应和所提出的相线圈效果。这是第一次研究相螺旋效应。校准程序和全自动校准系统的校准程序和示例解决方案，采用来自波兰的三相电源/能量校准器，可追溯到国家标准。讨论了电流线圈的校准不确定度，参考功率校准器和测量结果。该技术的最佳膨胀不确定度（K = 2）等于幅度线圈效果的0.03％，并且其等于相位线圈效果的0.14度。相位线圈效果的扩展不确定度等于0.14度，可在PF = 0.5处为电力= 0.5的有功功率等于0.42％而产生扩展的不确定性。结果是，由于相线圈效应的影响（0.42％），功率钳位特定精度（0.40％）与电源误差几乎相同。 （c）2017 Elsevier Ltd.保留所有权利。

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