Volts Squared Hours meter 2

[TestBeforeTouch]

What is the purpose of a volts squared hours meter? My utility company has one installed on my purchased power substation but I can't find anyone who knows what it is for.

 

[busbar]

 
No-load transformer {iron} losses vary with V² and fourth power. V²-pulse outputs for remote monitoring/logging give better resolution around high-end of line-voltage scale, or counting pulses in a demand register for longer-term voltage logging.

Handbook for Electricity Metering 8th ed. Appendices - page 186 with photo. Westinghouse VOLT SQUARED HOUR METER The type WVD4S as shown in Figure IV-41 is similar in appearance and general construction to a Type D4S single phase watthour meter. It is intended to be mounted in a standard four-jaw socket, or box. The upper right and upper left jaw assemblies do not have to be removed; however, no connections are to be made to these jaws (no external resistor is used).

IEEE Std 141-1993 {a/k/a “Red Book”} §11.7.5 Voltage-squared (V²) meters. Identified by a coined name (which is misleading because the meter reading directly determines effective voltage and not the square of voltage), a V² meter is an integrating meter similar in construction to a kilowatthour meter. The effective (rms) voltage for a time interval is the dial reading difference divided by the interval.

See also

http://www.utec.com/PDF/v2hourmeters.pdf

Have not found tariff description that used V²hr.

 

[TestBeforeTouch]

Busbar,
Thanks for the great info. I am still confused about V squared being a misnomer or not. In some of the info you provided it appears to be V squared in the other just V.

It sounds like this was a way to see what the average voltage was over a period of time, probably before scada systems, and appears not to be used much anymore.

 

[busbar]

V²hr registers appear to be common in multifunction energy meters {GE, SciCol, Schlumberger} and in Radian multifunction standards.

Some old habits die hard, maybe.