Hello Everyone:
I’m working on a project that will have a 300KW generator to back-up the entire facility. The building service is 800A at 480/277V. The building is designed to have 125HP fire pump (it went up from 60HP at last minuet). I’m trying to understand the operation/testing of the fire pump so we can keep the same generator size. The fire pump will be powered form the secondary side of the utility transformer and a separate 250A breaker in the generator. This is a new building and under design phase. My questions:
1. When you size the generator, do we always account for the building load AND the fire pump?
2. Is it common to do a load shedding for the mechanical system in case of fire?
3. I assume in fire pump testing mode when using the emergency power, the generator fire pump breaker will only be used but the generator building breaker will not be running, correct?
Thanks,
I’m working on a project that will have a 300KW generator to back-up the entire facility. The building service is 800A at 480/277V. The building is designed to have 125HP fire pump (it went up from 60HP at last minuet). I’m trying to understand the operation/testing of the fire pump so we can keep the same generator size. The fire pump will be powered form the secondary side of the utility transformer and a separate 250A breaker in the generator. This is a new building and under design phase. My questions:
1. When you size the generator, do we always account for the building load AND the fire pump?
2. Is it common to do a load shedding for the mechanical system in case of fire?
3. I assume in fire pump testing mode when using the emergency power, the generator fire pump breaker will only be used but the generator building breaker will not be running, correct?
Thanks,