275Â kV cable discharge field measurement and analysis of SVLs chain failure using ATP

The measurement results are used in EMTP-ATP simulation to confirm that trapped charges may be sufficient to cause sheath voltage limiters (SVL) of the cable to fail. The number of SVL breakdown depends on the mode of SVL failure, i.e. whether it attains low impedance (short circuit) or open circuit when the energy absorbed exceeds the rating.