The TRM-20 is Vanguard Instruments’ third generation transformer winding resistance meter. The TRM-20 is designed specifically to measure DC resistance values of transformer windings, rotating machine windings, or any dc resistance of an inductive device.
The TRM-20 features dual resistance-reading input channels that can measure two winding resistances simultaneously (primary and secondary windings of a transformer). It can provide a fast and stable reading of very large transformers by utilizing a 60Vdc power supply. The TRM-20 is capable of outputting a selectable test current from 1A to 25A.
Since the TRM-20 can accurately measure resistance values from 1 micro-ohm to 2,000 Ohms, it can be used as micro-ohm meters to measure EHV circuit breaker contact resistance, or for any low resistance measuring application. The TRM-20 can automatically demagnetize the inductive device under test, eliminating the manual task of demagnetizing the transformer core after a resistance test.
- Auto-discharge circuit for operator safety
- Demagnetizes transformer after test
- Selectable test current from 1A to 25A
- RS-232C, USB, and Bluetooth computer interfaces
- Built-in thermal printer
TRM-20是Vanguard Instruments的第三代变压器绕组电阻表。TRM-20用于测量变压器绕组，旋转电机绕组或电感设备的任何直流电阻的直流电阻值。
TRM-20具有双电阻读取输入通道，可同时测量两个绕组电阻（变压器的初级和次级绕组）。它可以通过使用60Vdc电源为大型变压器提供快速稳定的读数。TRM-20能够输出1A至25A的可选测试电流。
由于TRM-20可以精确测量1微欧至2,000欧姆的电阻值，因此可以用作微欧姆表来测量高压断路器的接触电阻，或用于低电阻测量应用。TRM-20可以自动对被测电感设备进行消磁，消除了在电阻测试后对变压器磁芯进行去磁的手动任务。
- 自动放电电路，确保操作员安全
- 测试后对变压器进行消磁
- 可选择的测试电流为1A至25A
- RS-232C，USB和蓝牙计算机接口
- 内置热敏打印机
单相绕组电阻测试仪（测试电流可达25A，具有自动放电和消磁功能）
产品功能和性能：
主要用来测量变压器绕组、旋转电机绕组的直流电阻，或者任何感性设备的直流电阻。
产品卖点：
1）单相变压器绕组电阻测试仪；
2）测试电压为60V，最大测试直流电流为25A；
3）双电阻读取输入通道；
4）计算任何温度下的等效电阻值；
5）每次测试后能自动放电和消磁，从而保障测试人员的安全；
6）使用电阻图表来检测LTC触点的先通后断状态；
7）USB 闪存，USB、RS-232及蓝牙通讯接口；
8）单机或电脑控制运行。
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