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实用新型
CN204228938U 一种大型地网接地电阻测试仪的计量性能校验装置 失效 - 放弃

一种大型地网接地电阻测试仪的计量性能校验装置
摘要：
本实用新型涉及一种大型地网接地电阻测试仪的计量性能校验装置，属于大型地网接地电阻测试技术领域。本实用新型的校验装置，对大型地网接地电阻测试仪计量性能包括：示值误差，辅助接地电阻对示值误差的影响，地电压对示值误差影响，地网自感对示值误差的影响和测试线间串扰对示值误差的影响。本实用新型校验装置可以对大型地网接地电阻测试仪抗干扰能力进行定量评估，并加入了地网自感、测试线间串扰这两个因素的影响，使得大型地网接地电阻测试仪能够在模拟真实工况的环境下进行检测，保证了大型地网测试仪性能评估的有效性。
摘要（英）：

The utility model relates to a metering performance verification device of a large-scale earth-screen earth-resistance tester. The device belongs to the technical field of testing of a large-scale earth-screen earth resistor. The verification device targets at the metering performance of the large-scale earth-screen earth-resistance tester, including an indication error, including an effect of an auxiliary earth resistance on the indication error, an effect of an earth voltage on the indication error, an effect of an earth-screen self inductance on the indication error and an effect of inter-test-line crosstalk on the indication error. The verification device is capable of carrying out quantified estimation on the anti-interference capability of the large-scale earth-screen earth-resistance tester and effects of two factors including the earth-screen self-inductance and inter-test-line crosstalk are added so that the large-scale earth-screen earth-resistance tester is capable of carrying out detection in an environment which simulates a real work condition and thus the effectiveness of the performance estimation of the large-scale earth-screen tester is ensured.

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