It is use for monitoring phase sequence in three phase power network system.
Mechanic phase sequence indicator
Applicable on 100-150V or 150-500V three-phase power network. When the rotation of disc with arrow sign is clockwise,the phase sequence is correct.
Anti-clockwise rotation measns wrong sequence.
Exchanging any two of the three hot wires,obtain the correct phase sequence.Each test should not be longer than 5 minutes.
LED phase sequence indicator
Measuring status of phase seqence: correct phase, incorrect phase of lack of phase.
a. Correct led lit: phase sequence is corrct.
b. Wrong led lit:phase sequence is incorrect.
c.both correct and wrong ledss lit:lack of phase. when the wire is lack of phase and its led will goes off.
With relay output can be customized.