The DP40 Discharge Probe is specifically designed to safely discharge high voltage cables after testing. It serves as a standard accessory for the T&R PT30-10 Mk3 AC test set, and it is also available for separate purchase. The instrument consists of a pointed probe that connects to a 5m long earth lead using surge resistors. It features an insulated handle and clear silicone insulation on the earth lead, enabling easy conductor inspection. The earth lead terminates with an M6 hooked crimp.