Product Details

Contact Loop Resistance Tester

达瑞电力为您推荐：

   接触回路电阻测试仪又称回路电阻测试仪还称大电流微欧计It is a specialized tester for contact resistance of high/low voltage switches, cables, wires, and welded joints. Its current adopts the standard current recommended by national standard GB736, enabling resistance measurement under standard current conditions. The instrument features compact size, light weight, strong anti-interference capability, high precision, easy operation, and comprehensive protection. It meets the requirements of power supply departments for on-site HV switch maintenance and factory loop resistance testing.

Technical Parameters

测量范围100A 0-3000uΩ

200A 0-1500uΩ

Accuracy: Class 0.5

显示方式：液晶显示 结果打印

工作电压：AC220V

工作原理：取样——放大——保持——A/D转换——单片机处理——

输出结果：显示和打印

外形结构：采用标准机箱结构紧凑，电源输入插座和电源开关在仪器的下部

Specs	Accuracy	Measurement Range	Description
GHHL-100	0.5级±1个字	1～1999μΩ	手动100A型
GHHL-100A		0～3999.9μΩ	智能100A型
GHHL-200		1～1999μΩ	手动200A型
GHHL-200A		0～3999.9μΩ	智能200A型

Working Principle

The loop resistance tester uses PWM high-frequency switching power supply to provide >100A test current. When measurement is triggered, the HF switching power supply outputs >100A test current while the sampling circuit begins sampling. The signal is amplified, converted from analog to digital by A/D converter, then filtered, computed, and processed by the microprocessor, finally displaying current and resistance values. After 10 seconds, the system auto-resets. When measured loop resistance is <400μΩ, minimum resolution is 0.1μΩ; when >400μΩ, minimum resolution is 1μΩ.

Switch Loop Resistance Tester — Test Principle:

1. 50Hz AC rectified to 15KHz HF power, then transformed to LV DC. Feedback from voltage drop across load. PWM technology achieves automatic constant current.

2.当直流100A测试电流通过被测电阻时，产生压降，同时通过机内标准电阻产生压降。精度高于一般的电桥测

Note: The above information and technical parameters are compiled and published by Yangzhou Darui Electric Co., Ltd.