Victorian Consolidated Regulations

ELECTRICITY SAFETY (BUSHFIRE MITIGATION DUTIES) REGULATIONS 2017 - REG 7

For the purposes of the definition of required capacity in section 120K of the Act, the prescribed capacity is the ability—

        (a)     to reduce the voltage on the faulted conductor in relation to the station earth when measured at the corresponding zone substation for high impedance faults to 250 volts within 2 seconds; and

        (b)     to reduce the voltage on the faulted conductor in relation to the station earth when measured at the corresponding zone substation for low impedance faults to—

              (i)     1900 volts within 85 milliseconds; and

              (ii)     750 volts within 500 milliseconds; and

              (iii)     250 volts within 2 seconds; and

        (c)     during diagnostic tests for high impedance faults, to limit—

              (i)     fault current to 0·5 amps or less; and

              (ii)     the thermal energy on the electric line to a maximum I ² t value of 0·10.