T&R DP40 High Voltage Discharge Probe
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 test set and 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 a secure M6 hooked crimp.
*Note: Please ensure that you NEVER connect this earthing probe to energized AC distribution systems.
Key Features
- 40kV Maximum discharge voltage
- 7.2kJ Maximum discharge energy
- 6μF Maximum discharge capacitance
- 60kΩ Resistance
- 900mm Total length
- 5m Earth lead length
- 6mm² Earth lead CSA
- Highly flexible, clear silicone-covered earth cable




















