100A Loop Resistance Tester
100A Loop Resistance Tester电力系统中普遍采用常规的QJ44型双臂直流电桥测量变压器线圈的直流电阻、高压断路器的接触电阻，而这类电桥的测试电流仅为mA级，难以发现变压器线圈导电回路导体截面积减少的缺陷。
Overview
Power systems commonly use QJ44 double-arm DC bridges for transformer winding and HV circuit breaker contact resistance measurement, but their test current is only mA-level, making defects hard to detect. Oil film and contact oxidation affect HV switch testing. Per SD301-88 regulations, 100A test current is required.
100A回路电阻测试仪是采用数字电路技术和开关电源技术相结合设计而成。它适用于开关控制设备的接触电阻、回路电阻的测量。其测试电流采用国家标准推荐的直流100A。可在电流100A的情况下直接测得回路电阻和接触电阻，并用数字显示出来。该仪器测量准确、性能稳定，适合电力、供电部门现场高压开关维修和高压开关厂回路电阻测试的要求。
Technical Specifications
1. Measurement Range: 1~1999μΩ
Resolution: 1μΩ
3. Test Current: DC 100A
4. Accuracy: 0.5%±1d
5. Display: Current: 3½-digit LCD
Resistance: 3½-digit LCD
Power: AC220V±10%, 50Hz
7. Operating Environment: Temp -10C~40C, Humidity ≤80%RH
8. Dimensions: 300x270x200 mm³
9. Weight: 5Kg (excluding accessories)
Product Features
1、大电流：采用最新电源技术，能长时间连续输出大电流，克服了脉冲式电源瞬间电流的弊端，可以有效的击穿开关触头氧化膜，得到良好的测试结果
2、抗干扰能力强：在严重干扰条件下，液晶屏最后一位数据能稳定在±1个字范围内，读数稳定，重复性好
3、使用寿命长：全部采用高精度电阻，有效的消除环境温度对测量结果的影响，同时军品接插件的使用增强了抗振性能
4、携带方便：体积小、重量轻
