The Model 462F is designed for use with any field test set for testing polyphase CT meters.

It can be powered from the metering test block, and will test nominal 240V, 3 phase, 4 wire star connected L.V. meters or nominal 63.5V star connected H.V. meters.

It can also test nominal 110V, 3 phase, 3 wire delta connected meters.
This phantom load can be used with the Red Phase Instruments Model 679 and 679B polyphase meter testers, or any other meter tester.

The 3 current outputs are variable from 0 to 100% in 1A and 10 A ranges in coarse (10%) and fine (1%) increments. Phase angle/power factor settings are available from 60º LEAD to 90º LAG in 15º increments.

These two 3 phase phantom loads are used for energising CT primaries during commissioning or routine testing. The 467 can deliver up to 200VA, and the 467B is a lighter version capable of 100VA injection.

"Variacs" are used to adjust the current injection amplitude from zero to full scale. Shrouded safety plugs and sockets are used to connect the cables to the front panel. The input required is 240V/415V 3 phase, 4 wire and this is protected with a 3 pole circuit breaker.

Suited to heavy duty workshop or field testing of meters up to 150A, this Model is conveniently housed in two separate voltage and current units.

Voltage unit:
The unit is powered from a nominal 3 phase 4 wire 240V/415V supply. The output voltage is individually switch selectable per element. The test output voltage is switch selectable in three ranges (70V, 127V and 220V) and directly switchable to 90%, 100% and 110% of the selected range. In each range, this output is continuously adjustable by coarse and fine “Variacs”. A digital panel meter displays the phase to neutral voltage of the selected phase.



Current unit:
The test current output is 0.3A up to 150A, switch selectable in 12 ranges. Each range is continuously adjustable using “Variacs”. The test current can be directly switched between 10% and 100% of the chosen setting. The phase angle of the current can be varied from 60º lead to 90º lag in 30º steps. Three digital ammeters display the test current in each element.

This is an ideal unit for commissioning 110V protection, metering and control systems.

The isolated voltage output is star connected, 110V phase to phase, and can be varied –4%, 110V, +4%, +8%. It can be used in delta or star systems.

Output current is up to 6A/50VA in two ranges and can be varied 0 to 100% by using the “Variacs”. The injected current phase angle can be varied from 120º lead to 120º lag, switch selectable in 60º steps and infinite resolution within steps via the “Variacs”. Digital displays include 3 ammeters, watt/var meter and voltage/phase angle meter.

The current output “Variacs” can be ganged as shown here with a removable link.