How To Measure The Line Phase With Power Fittings?

Copper Terminal block How to measure the line phase?
Answer: Phase determination includes checking the phase sequence and checking the phase. For overhead lines with single-side power supply and single interconnection lines with power supply on both sides, only the positive phase sequence is required. The line phase determination method is as follows.
(1) Connect a phase sequence meter to the secondary side of the voltage transformer and observe the phase sequence indication.
(2) Turn on the existing motor and observe the motor direction to make a judgment. The phase needs to be checked for ring networks or parallel interconnection lines.
(3) Use a single-phase voltage transformer primary winding to bridge any phase of the two-side lines, and connect a voltmeter or indicator light to the secondary side of the voltage transformer. When the voltmeter indicates zero, it is judged to be in the same phase.