This Article is about setting up the voltage ratio for Potential Transformer (PT's) when using a Fluke-1777, Fluke-1775 or Fluke-1773.

When using PT's you need to make sure the Nominal Voltage level is the same as the Primary voltage of the Transformer.  

The nominal voltage is what the Fluke instrument uses to determine voltage Events when the voltage level goes above or below 

the nominal voltage will cause the meter to capture Events such as Dips, Swells, Interruptions, Rapid Voltage Changes,

Waveshape Deviations and Transients. 

As an example, if you are using PT's on a Primary Transformer rated for 4160V and the output of the PT is 120V the ratio should

be set at 35:1. 

Below is an example of the setup showing nominal voltage 120V and ratio is 1:1 and then changing the setup to be nominal voltage

to 4160V and ratio to 35:1.