The VC24-24 Mk3 AC Test Set is a general purpose high-voltage AC test set, ideal for Flash Testing of plant and switchgear, such as circuit breaker vacuum bottles, with voltages up to 24kV AC. The output voltage is variable from 0 to 24kV. A zero voltage interlock is provided, ensuring that the output may only be energised with the voltage control at zero.

The unit features automatic mains voltage selection and an emergency off switch. The output voltage and current are metered by large, linear analogue instruments. The unit has a x0.1 range on the mA meter. The mA meter is marked with a green scale for currents under 1-mA and a red scale for current larger than 10mA.