Hello,
I have a client that has two utility feeds that feed into an ATS. One utility feed is from 2 miles away and sends it to the ATS via their own medium voltage distribution. The other is nearby to the ATS. The utility grids are separate.
The system has automatic power factor correction equipment connected to the 480V distribution bus. The PF correction only goes online when only the near utility feed is feeding the distribution. When the ATS is switched to the far away utility, the PF correction is not online at all.
My thought is that the nearby utility has a lot of parasitic harmonics from neighbors. The nearby utility feeds many large facilities that use hundreds of drives. Can it be possible that the harmonics from the nearby neighbors effects the 480V bus and therefore kicks on the power factor correction unit? Then when connected to the far away utility, the neighbors that are at nearby to that 2 mile away location generally do not have harmonic producing loads so the harmonic load is not an issue and therefore the PF Correction unit does not kick on?
Thanks
I have a client that has two utility feeds that feed into an ATS. One utility feed is from 2 miles away and sends it to the ATS via their own medium voltage distribution. The other is nearby to the ATS. The utility grids are separate.
The system has automatic power factor correction equipment connected to the 480V distribution bus. The PF correction only goes online when only the near utility feed is feeding the distribution. When the ATS is switched to the far away utility, the PF correction is not online at all.
My thought is that the nearby utility has a lot of parasitic harmonics from neighbors. The nearby utility feeds many large facilities that use hundreds of drives. Can it be possible that the harmonics from the nearby neighbors effects the 480V bus and therefore kicks on the power factor correction unit? Then when connected to the far away utility, the neighbors that are at nearby to that 2 mile away location generally do not have harmonic producing loads so the harmonic load is not an issue and therefore the PF Correction unit does not kick on?
Thanks