Phase sequence indicator is a must for checking new electrical connections, installation and maintenance. It is useful in wiring of switchboards, when 3 phase watt meters and power factor meters are connected. In wiring 3 phase AC motors rotation can be checked and corrected if need be, by checking the sequence.


The instrument is of rotating disc type. When correctly connected to 3 phases R, Y and B the Black disc with white arrow rotates clockwise indicating that the phase sequence is correct. If the rotation is anti-clockwise one of the phases should be reversed.

Model: PSI-1

Casing : 

Housed in Bakelite Body (round shape) provided with three separate one meter long leads with appropriate colour viz. Red, Yellow, and Blue with clips and PVC sheaths.

Standard Accessories : Rexine carrying case
Working Voltage : 100V to 500V AC at 25Hz to 65Hz

For horizontal use only and should not be left in circuit

Model: PSI-2

Casing : 

Housed in ABS Moulded square Case supplied with one meter long built in Red-Yellow-Blue leads with crocodile clips

  • Standard Accessories : Rexine carrying case
  • Dimensions : 96mm x 96mm
  • Rating : 30 seconds @ 500 V, Burden – 15VA @ 500 V, Voltage – 50-500V (in horizontal position), 100-500V (in vertical position)
  • Frequency : 25-60Hz

The instruments can be used in horizontal as well as in vertical position. The instrument should not be left in circuit

"Instrument for accuracy & reliability since 1963" "Instrument for accuracy & reliability since 1963"