Puncture current transformer PSTT036 Rated input 100A 200A 300A 400A 5 – PowerUC,JYW6300 Transformer Short Circuit Impedance Tester,Amazon.com: QIUSUO High Accuracy Clamp AC/DC Leakage Current Clamp Meter Leakage Current Tester with Clamp Size 25mm*30mmand Range 0.001mA~60.0A Data ,Withstand Voltage Tester - Electrical Safety Test Instrument , Single-function Electrical Safety Tester- AINUO INSTRUMENT - Ainuo Instrument Co., Ltd.,Xhjb666 China Factory Supplier High Accuracy 6 Phase Protection Relay Tester Set