Capacitor on MCC with VFD
Capacitor on MCC with VFD
(OP)
Hello All,
I have an MCC 453 that has capacitors placed to help with power factor correction. On the same bus, there is a VFD present as well. Would anyone happen to know if the VFD could potentially affect the CAPS. Please share your thoughts
Thanks
I have an MCC 453 that has capacitors placed to help with power factor correction. On the same bus, there is a VFD present as well. Would anyone happen to know if the VFD could potentially affect the CAPS. Please share your thoughts
Thanks






RE: Capacitor on MCC with VFD
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RE: Capacitor on MCC with VFD
RE: Capacitor on MCC with VFD
The following is from IEEE Red Book:
"Harmonic problems. Symptoms of harmonic problems include blown power factor correction capacitor fuses, a reduction in plant power factor, motor and transformer heating and/or failure, and possibly unexplainable operation malfunctions of process controls, especially timing problems in electronic equipment. Typical causes of harmonic problems include the application of power electronics and other solid-state power control devices for plant processes combined with power factor correction capacitors, creating harmonic resonance situations."
Trust you will find it helpful.
RE: Capacitor on MCC with VFD
RE: Capacitor on MCC with VFD
1. De-Tuned (that won't allow other than fundamental component to pass to the capacitors) PFC capacitor banks and
2. Harmonic filters on the input side of VFDs or Low harmonic (with active front-end) VFDs