W
wattsup
Hi guys
I’ve been asked to provide a standby generator for a residential/small home business property.
I will be needing something like a 6 kVA diesel genset, manual electric start and transfer switch….anyhow
I’ve seen conflicting advice regards earthing arrangements when power is supplied via the genset.
Existing earthing is pme.
The generator housing will be roughly 30 metres from the main building, the feeder cable buried 3-core swa. Two earth rods adjacent the housing and bonded to the genset framework, and carried through the swa windings and one core to the transfer switch, and thus to the distribution board.
Now, does the main utility supply earth need breaking via the transfer switch, as well as L&N when the genset is running?
I’ve got some notion it does, because possible earth fault from genset backfeeding to utility supply, via E&N fault.
I’ve read tech documents from the generator supplier but they are pretty vague, probably because their sets are used worldwide and different regs apply in different countries, not to mention alternative earthing methods.
Hope someone can advise
I’ve been asked to provide a standby generator for a residential/small home business property.
I will be needing something like a 6 kVA diesel genset, manual electric start and transfer switch….anyhow
I’ve seen conflicting advice regards earthing arrangements when power is supplied via the genset.
Existing earthing is pme.
The generator housing will be roughly 30 metres from the main building, the feeder cable buried 3-core swa. Two earth rods adjacent the housing and bonded to the genset framework, and carried through the swa windings and one core to the transfer switch, and thus to the distribution board.
Now, does the main utility supply earth need breaking via the transfer switch, as well as L&N when the genset is running?
I’ve got some notion it does, because possible earth fault from genset backfeeding to utility supply, via E&N fault.
I’ve read tech documents from the generator supplier but they are pretty vague, probably because their sets are used worldwide and different regs apply in different countries, not to mention alternative earthing methods.
Hope someone can advise