Electric megohm meterTransformer resistance testerGas insulated ac voltage withstand test unitDigital multimeterControl transformerSingle-phase voltage regulatorVoltammeterPointer multimeterKnife switch
Electric megohm meter<br>Transformer resistance tester<br>Gas insulated ac voltage withstand test unit<br>Digital multimeter<br>Control transformer<br>Single-phase voltage regulator<br>Voltammeter<br>Pointer multimeter<br>Knife switch