
Power Factor Capacitor Question
#1
Posted 07 November 2007 - 08:52 PM
#2
Posted 08 November 2007 - 02:30 AM
If you run the motors open shaft, (No shaft load) then the current drawn will essentially be the magnetizing current.
If you apply static correction, then the correction current should be 80% of the magnetizing current.
If you apply bulk correction, then you can correct higher than that.
Best regards,
Mark Empson | administrator
Skype Contact = markempson | phone +64 274 363 067
LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters
#3
Posted 08 November 2007 - 07:25 AM
Why you want to use microprocessor? According to your question, you want to connect capacitor at motor terminal (static correction) then there is no need of microprocessor. You calculate the capacitor as Marke replied.
"Don't assume any thing, always check/ask and clear yourself".
#4
Posted 13 November 2007 - 07:14 AM
Z = V/I
When you have calculated the impedance, you can calculate the capacitance as z = 1/(wc)
therefore C = 1/(2 x pi x F x Z)
or you can multiply the volts time the amps, divide by 1000 to get the required KVAR.
Best regards,
Mark Empson | administrator
Skype Contact = markempson | phone +64 274 363 067
LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters
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