The energy without rupture of power capacitor is an important safety index

representing energy limit which

in case of inter-pole short circuit of capacitor

could not cause the capacitor case to rupture when the external circuit is injected into the fault point（including the charge of capacitor itself）. It is a requirement to the safe strength of capacitor case. It is shown through comparison and analysis of energy without rupture at several common different wiring and layout of the capacity that the maximum energy without rupture generated by the device by way of reasonable wiring and layout exceeds 15 k J

which can avoid major fault.