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PD30 / PD60 Partial Discharge Detection and Location for MV Cables Click on Image to Enlarge Find your Cable  Faults before they occur Technical Data Sheet What is Partial Discharge? A Partial Discharge is a partial electrical breakdown in the dielectric material which does not bridge the dielectric between the conductor and the concentric neutral. The unit of partial discharge measurement is the Pico Coulomb (pC). The general factory acceptance criteria for newly manufactured MB XLPE cables is 5pC. The PD levels during site measurements, depend on type of cable, type of joint/splice/termination. A good PILC oil impregnated may display a PD level of 100pC. A XLPE dielectric on the other hand could not continue operating at this level. Dry type terminations may discharge at 200pC for years without failing (but they will eventually fail). Today P.D. diagnostics provides the Technician with a non-destructive means of eveluating the cable and the accessories. These partial discharge locations continue to discharge slowly breaking down the dielectric like a silent cancer. It is just a matter of time, which varies from hours, to days or even years before the cable or accessory will fail. By locating these P.D. sites timeously, corrective measures can be taken before the cable fails thus avoiding Power Failures and Customer Outages. The PD30/PD60 consist of the following: High Voltage Filter Coupling Capacitor Partial Discharge Detector Software for PD Diagnostics and PD Cabling and Earthing HVA High Voltage Lead Corona Rings Technical Data   PD30 PD60 HV Filter + Coupling Capacitor Rated Voltage kV (peak) 33 62 Rated Current (amps) 1 1 Filter Capacitance (nF) 20 10 Dimensions LxHxB (mm) 550 x 660 x 250 550 x 800 x 360 Weight (kg) 30 45 sales@hvdiagnostics.com

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