Silverback Power

Just my 2 cents worth. The problem with the earth leakage tripping when load shedding ends is fue to the inrush currents and high inrush voltages the system has when power is restored. Neutral and earth is fundamentally or should be at the same potential at the Transformer star point. Quick solution to all of.these tripping issues and general protection of your electrical jnstallations 1 phase installtion or 3 phase. Get a normal circuit breaker as the main switch ir. 80 Amp or 60 Amp. Then feed it into a standalone 100 Amp contactor, mounted in a box next to your db. The reason for a 10p Amp contactor is that due to heat one always need to oversize the contactor, adding 40 % as a safety factor always works.Then from from contactor supplying a 63 Amp Earth leakage unit which then supplies all your load circuit breakers. Then have a phase failure over under Voltage relay connected to a 10 Amp circuit breaker fed from the load side of the Main switch with a 30 second or more " On" delay function. This relay in short monitors the incoming supply from Council. Once the supply is stable it switches the contactor on which in turn switches supply to the Earth leakage unit and then to the load circuit breakers. You can also install Class 2 surge protection after the main switch before the contactor to protect your system further if you so wish. I would advise it. Make sure all surge protection units are supplied by a circuit breaker so that if the surge protection ever fails in the closed state the circuit breaker will trip as the secondary side of the surge protector is connected to earth. For a 3 phase installation install a 63 A earth leakage per phase supplying the load for that phase. Do not ever take your stove, geyser or swimming pool off earth leakage. if you ever have a problem with one if these 50 mA can kill. Rather find the faulty appliance etc. And fix or replace it. Anyone who tells you to take anything off earth leakage is a fool and must not be listened to. Total cost of the above set up is probably just under R10k. But totally worth it and will save you endless problems. Get a competent licensed electrician to install the above for you. Regards Clint D