The CDS-3616U is ideal for Network Systems or other situations where cables are rated up to 69kV, oil insulated cables, and/or long cable lengths are encounted. The powerful 1600 joule pulse makes fault locating easier using acoustical and electro-magnetic detection devices. With 280 mA of burn current, faults can be rapidly reduced to low voltage levels, permitting thumping at lower and less damaging voltage levels. The CDS-3616U can thump at 9kV, 18 kV, or 36 kV yet deliver 1600 joules. There is no better thumper. The CDS-3616U offers the complete package: three full joule output voltages, three variable hipot outputs, 280 mA burn current, variable discharge rate, tdr/radar ready, and its extremely durable design holds up to years of use. Another plus: all HVI Thumpers use EPR high voltage output cable rather than XLPE. EPR stays flexible in cold weather.