Rotating Magnetic Field Tester: The three-phase tester can test the frequency range of 20Hz to 400Hz, weighs about 200 grams, and is equipped with a convenient carrying case, which can carry the digital current tester in a pocket for easy carrying. Design: Phase sequence table, the test socket LED tester can display the phase, buzzer display status and indication. Alligator clips are used to make the access to the top very firm. Easy to use: The green LED indicates the correct phase sequence and beeps intermittently. The red LED displays in reverse order and beeps continuously. Wide voltage test: This instrument can detect three-phase AC voltage from 60V to 600V, with excellent performance. LED lights can indicate whether the phase is on or off, and support buzzer indication. Function: The rotating magnetic field three-phase electric meter tester can test the frequency range of 20Hz-400Hz, which is efficient, effective, reliable and simple. Working voltage: three-phase AC voltage 60V~600V Maximum dielectric strength: 2000V\/min Impulse voltage: 4000V Measurable frequency range: 20Hz~400Hz Size: 85X64X23mm Weight: about 220g Test cable length: about 1 meter long (3.3 feet) Limited time for use continuous: 60 minutes at 60 V AC max 4 minutes at 600 V AC max Open phase check indicators: Three orange indicators for U phase, V phase and W phase. Phase sequence detection LED: 1 red LED, 1 green LED When the voltage is lower than 600 V, you can use the phase tester to test with confidence. The SM-852B phase detector has two main functions, phase failure and phase sequence detection and display. Measuring line: Red corresponds to U(R) phase (L1, R); Yellow corresponds to V(Y) phase (L2, S); Green corresponds to W(B) phase (L3, T). Note: The data are all measured manually, please allow a 1-3cm error Due to differences in light and display, there may be some color differences, please refer to the actual item received.