Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
(OP)
On 13.8 kv circuit we've had customer complaints of blinking lights. After visually inspecting the circuit the only unusual condition was a 3 phase pole top capacitor bank (with Beckwith M-2501B Autodaptive control) installed one pole span downstream of 3 single phase line regulators.
I'm wondering if the regulator and cap bank configuration might be causing a buck and boost condition due to the close proximity and both use voltage sensing for control.
Could this setup be causing the voltage dips and spikes or is this a typical configuration?
Thank you for your assistance.
Manindemand
I'm wondering if the regulator and cap bank configuration might be causing a buck and boost condition due to the close proximity and both use voltage sensing for control.
Could this setup be causing the voltage dips and spikes or is this a typical configuration?
Thank you for your assistance.
Manindemand






RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
I don't have the software or IR cable to be able to read data.
Budget is tight, so, I was just hoping someone had also experienced this type of problem to help us decide whether to change the cap bank controls to a different type/config.
We still have a recording meter at the station, so, I'm thinking about taking the cap bank off line and watch our recorder readings to see if blinks go away.
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RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
You are right. I am familiar with the term "flicker" and I usually associate it with occurrences such as motor starting.
I was just trying to clear up the terminology for me.
RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
It is characterized by the sudden onset of very high sustained overvoltages along with high levels of harmonic distortion. Ferroresonance has been known to be responsible for equipment damage and equipment protection malfunctions.
RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
wareagle and davidbeach - blinking is probably not the best word to describe. Flicker is more accurate. Some early records show momentary dips down to 90 VAC at customers meter.
Dumbo2929 - sounds like you nailed it. Each regulator is connected wye. The records also show overvoltage spikes as you describe.
Some problem descriptions include:
1.)Computer backup power supplies turning on an off as sags occur.
2.)Computers rebooting (with no UPS).
3.)Ceiling fans can be heard humming louder and softer as they speed up and slow down - while customers try go to sleep.
4.)Lights dimming and brightening.
For some reason the major problems just stopped around 11-18-07...beats me?
I'll upload a few records for you to view. I guess we get one file per post so I'll follow with 2 more posts.
Thank you all for your help. I'm sending our engineers a link to this thread in hopes it will assist them.
Manindemand
REAL MEN LOVE JESUS!
RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
I don't know how those add links got into my previous post!
REAL MEN LOVE JESUS!
RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
REAL MEN LOVE JESUS!
RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators
RE: Blinking Lights - Pole Top Cap Bank set 1 span from Line Regulators