You are correct, dpc. Since my last post, I have learned that the other loads can be shunt tripped if the fire pump needed to run...EITHER the lights & fans OR the Fire Pump.
I agree erosa, a reduced voltage starter is what my client needs but the fire pump controller is brand new...once I...
Sorry guys, I just don't have the space for the diesel motor to be coupled to the existing pump or the installation of a diesel pump.
Is there a way to be able to use this 500kW generator to provide power to more than the fire pump? My client wants to power the lights and exhaust fans also...
I agree...the ten seconds is for the generator startup and the 15% is for the voltage drop. I was thinking that if it took 10 seconds for the generator to kick in, then there's no way that the voltage wouldn't drop more than 15%.
By the way, the FLA for the motor is 156 and the LRA is...
My client wants a back-up generator for his 125HP, 480V, 3phase fire pump motor. The fire pump controller is an 'across-the-line' starter type.
I have gone through some sizing software provided by generator manufacturers and I came up with a 200kW unit. The factory guy tells me I need a 500kW...
The current system is supposed to be ungrounded. They have a fault somewhere in the system on B phase. I have their electricians double checking the voltage measurements even as we speak.
Their lights are 480...fed from combinations of the three phases like AB, BC, AC.
We just wanted to run...
I just got back from the client's plant.
They use 480 for their lights...no transformation to 120 (for lights).
The way it was explained to me by the electrician is this: Phase A&B would be taken to light 1, skip light 2, then proceed to light 3, skip 4, proceed to light 5, etc. Phase B&C...
I hope this helps you help me...
a)Secondary Voltage, New and Existing is 480VAC, 60HZ
b)Existing Ground = Ungrounded
c)Center of wye, connected to ground rod adjacent to new pad, which is then connected to ground bus of new/existing switchgear. A neutral will also be pulled in for future...
I've got a client who is getting a new 750KVA transformer from his utility. The new transformer is delta on the primary and wye on the secondary. His existing transformer is a 500KVA bank that is delta on both the primary and secondary.
What effects, if any, will this service change have upon...
Thanks for the response.
I forgot to mention that this conduit is running through the ceiling joists, about 10' above grade. Concrete doesn't seem like an option.
The conduit that supplies my client's fire pump controller with power runs through a room not protected by sprinklers. Is there a product that I can apply (foam, blanket, etc.) to this conduit to make it fire resistant, even fire proof. Re-routing the conduit is not an option.
Thanks...
