Use Table Configuration to set up tables of values. Then, create rules that look up values from the tables. This sample procedure creates a subrule to set Dry Flashover Voltage based on a conductor's Nominal Line Voltage. You can then create a validation rule with a resolution that looks up Nominal Line Voltage and sets the appropriate Dry Flashover Voltage. Adapt this procedure as needed.
Setup panel
Table Editor. You can also enter AUDTABLECONFIG on the command line.

For more information, see To Configure Tables.
Setup panel
Manage Rules.
Real
Electric
LineString. 
Functions
Table Lookup. 

Empty and then click the table column to match. In this example we use Nominal_Line_Voltage. 
Conductor's Attributes and select the attribute of interest. In this example we use Line to Line Voltage. 
Empty and then click the table column containing the value of interest. In this example we use Dry_Flashover_Voltage. 
This subrule evaluates to the corresponding Dry Flashover Voltage from the table, based on the conductor's voltage.
