POCO voltage standards

[chris kennedy]

What percentage do the Feds allow poco to be over/under voltage?

Thanks

 

[jumper]

I have seen a ANSI chart that says +/- 5% for service voltage, but I cannot confirm any Fed law requiring it.

 

[jumper]

If you are bored you can read this:

http://www.pge.com/includes/docs/pd...ergystatus/powerquality/voltage_tolerance.pdf

 

[Jraef]

The Feds are not in charge, the PoCo's are. But MOST of them adhere to ANSI standard C84.1-2011, the American National Standard for Electric Power Systems and Equipment – Voltage Ratings (60 Hertz). In the West, we have EUSERC, a consortium of PoCos which has standards too, but if you read them, they are the ANSI standards anyway.

ANSI standards
http://www.powerqualityworld.com/2011/04/ansi-c84-1-voltage-ratings-60-hertz.html

EUSERC standards
https://www.sce.com/NR/rdonlyres/4483888E-4DF1-4DBB-ACC3-B6B087ADC123/0/BusESR200201.pdf

 

[mgookin]

Chris: FPL has on a simple homeowner FAQ page the following statement "A voltage fluctuation is a dip or spike in the flow of electricity to your home. The state of Florida requires that utilities normally operate within a range of plus- or minus six volts (114 - 126) from standard voltage (120). Fluctuations of more than six volts may cause your lights to dim or brighten."

Don't ask me what "normally" means.

From https://www.fpl.com/reliability/power-disturbances/faq.html

That tells me our public service commission has some sort of standard. I checked on the PSC website and came up blank.

 

[chris kennedy]

Thanks all.

 

[jaggedben]

IEEE is +12% to -10% , I'm pretty sure. It's what solar inverters follow.