HereI'm not able to find this information, can you please point me to it.
This device is rated at 63A. This is about 15KW at 240V.
I'll be surprised if an isolation transformer found its way in a tiny 4pole MCB package.
Apologies for the confusion, I thought we were referring to this.
that's what I was doubtingApologies for the confusion, I thought we were referring to this.
oh..ok thanks for the update.hello
Yes it has an isolation transformer.
Just to be on safer side and also on suggestion of other expert FMs, I am getting this device installed at Meter level for Over/Under Voltage , over current , surge and leakage protection.
Surges are classified into two - a Switching Impulse from the network that has a rise time of 250 microseconds and a tail of 2500 microseconds. These are important above 220kV.
Lightning Impulse are very fast 1.2 microseconds rise time and a tail of 50 microseconds. These are the ones that affect us consumers. They can strike the lies supplying our houses and that's it.
As you wrote nothing is better than complete disconnection.
The other kind is surge for common folks but are swells or spikes caused by faults in power systems or light loaded transformers with high tap setting etc. For these a properly selected MOV should be good enough.
Can't say if the trees were the reason. Most probably it is the power line that connected the house to the network.I totally agree, nothing better than disconnecting everything when we can expect a lightning strike. In my wife's house in Chennai, just about EVERYTHING was burnt (the ones that were switched off, but plugged in as well). Wires, Terminals, pretty much everything had to be redone.
Their house is surround by trees and plants, with a garden in front and large trees at the back. They connected lightning power to the house I think :-D.
They still have not installed a lightning arrestor.
Can't say if the trees were the reason. Most probably it is the power line that connected the house to the network.
Trees generally burn down or break into splinter if lightning passes through them. And trees taller than the house in a way protect the house since lightning will strike the tallest object as a leader will emanate from it to connect earth to the cloud.