Motor Brake Horsepower (BHP)
Motor Brake Horsepower (BHP)
(OP)
Is there any rule of the thumb or parameter estimation formula for estimating the mechanical loading of a given Pump, Fan or compressor HP rating for LV applications say 460VAC motors, 60Hz?
Whenever, there are existing motors where we are adding up new motor loads or when motor HP ratings are identified but without any given information on demand HP, what are best way to estimate the demand and associated power factor and efficiency?
Whenever, there are existing motors where we are adding up new motor loads or when motor HP ratings are identified but without any given information on demand HP, what are best way to estimate the demand and associated power factor and efficiency?
GO PLACIDLY, AMIDST THE NOISE AND HASTE-Desiderata





RE: Motor Brake Horsepower (BHP)
RE: Motor Brake Horsepower (BHP)
Also don't forget to look at the revenue meter. Many of the newer meters display the current demand as well as the maximum demand. (Don't forget the multiplier.) If the installation is not billed on demand, the demand indication may be the maximum from initial installation.
Another resource is the friendly local metering engineer. The metering department of one utility was kind enough to send out a technician with a laptop to down load the memory of an electronic revenue meter. He gave me a floppy disk with KVA, KW, volts per phase and amps per phase at 15 minute intervals for the last 6 weeks.
If you are not able to access these resources then you will probably have to go with the recording ammeter as David suggests.
respectfully
RE: Motor Brake Horsepower (BHP)
GO PLACIDLY, AMIDST THE NOISE AND HASTE-Desiderata