What standards would be used in a var meter calibration?

[DnBWraith]

I have a few that need to be checked out. I was just wondering if anyone knew of the standards needed to do this and/or could recommend a model. Thank you for all help.

 

[busbar]

It’s routine to use a known AC voltage and current source that has control of the phase angle between the two quantities.

Examples are Arbiter Systems 1040 and Fluke 6100. Depending on accuracy needed, a modern protective-relay test set like Doble F2100 may do for the task.