Phase Sequence Detectors

Phase sequence (Red - Yellow - Blue) plays a major role in functioning of equipments and machines on the shop floor / Laboratories, throughout the world. Change in phase sequence can result in equipment failure, machine breakdown and also accidents due to phase reversal in motors.
Hence, It is very Important to verify the phase sequence after maintenance activities carried out in every stage of power handling units/sub-stations. To serve this purpose, we have developed a phase sequence detector to verify the phase sequence at various stages of power handling systems. The device operates in two modes. In one mode it ensures that the same phase of feeder 1 and the same phase of feeder 2 are phase with each other. In another mode it ensures that the 2 phase of same feeder are out by 120 Deg C with each other.


Specification :
  • Tolerances : +/- 10% Standard - As per 1EC - 61958
  • Mode of operation: PSD -Twin - 00 operates in two modes.
  • 1 - 1 mode : In this mode, condition is OK (when both the signal inputs are in phase with each other. Eg. R-phase of feeder 1 is compared with R-phase of feeder 2
  • 1.1-2 mode: In this made, condition is OK when both the signal inputs are 120 Deg out of phase with each other. Eg. R-phase of feeder 1 is compared with Y-phase of same feeder.
  • Power source : 9 V DC Battery, Signal Inputs: Conditioned stimulation from VPIS.
Phase Sequence Detectors