t_van
Member
- Location
- Austin, Texas, USA
Revised standby generator connection
Revised standby generator connection
The generator provides emergency power to a lift station. The generator full load current is 414A. The 450A breaker is the max size breaker for the genset. The generator breaker will be 400A since the main CB is also 400A. The ATS is 3-pole switch that doesn't switch the neutral. Initially the circuit was drawn with the generator neutral NOT being bonded to the utility neutral. After more research and discussion with others, i've learned that if the generator neutral and utility neutral never come in direct contact,(either because the neutral is switched at the transfer switch, or the generator is a 3-wire system without a neutral), it is a separately derived system. I've now changed the design so that the generator neutral and utility neutral are bonded in the ATS which then makes the system a non-separately derived system.
Revised standby generator connection
The generator provides emergency power to a lift station. The generator full load current is 414A. The 450A breaker is the max size breaker for the genset. The generator breaker will be 400A since the main CB is also 400A. The ATS is 3-pole switch that doesn't switch the neutral. Initially the circuit was drawn with the generator neutral NOT being bonded to the utility neutral. After more research and discussion with others, i've learned that if the generator neutral and utility neutral never come in direct contact,(either because the neutral is switched at the transfer switch, or the generator is a 3-wire system without a neutral), it is a separately derived system. I've now changed the design so that the generator neutral and utility neutral are bonded in the ATS which then makes the system a non-separately derived system.
