PT30 10 high voltage dc pressure test sets are designed to perform tests on installed cable and jointing systems. It has a variable output voltage with a maximum ±30kV dc and  a maximum charging capability of 10mA.

A safety zero-volt interlock is fitted that prevents the output being switched on unless the output control is at zero. Included is a automatic load discharge system that discharges the cable under test when the output is switched off or a breakdown occurs. The internal dumping system can discharge a maximum of 2.5kJ on each output, corresponding to 4mF at 30kV. 

In the event of a test object failure, the overload circuit will automatically switch off the output voltage and earth the output via the internal discharge circuit. A manual discharge probe is also supplied as standard with both units, allowing higher load capacitances to be safely discharged.