Vista® UDS Time-Current Characteristic Curves

Time-overcurrent relay curves marked with a star (Star) conform to IEEE C37.112-1996, “IEEE Standard Inverse-Time Characteristic Equations for Overcurrent Relays.”

S&C Standard Speed
Curve Type Device Type TCC Number PDF Excel
Minimum Tripping S&C Overcurrent Control TCC Number 680-9
Total Clearing S&C Overcurrent Control TCC Number 680-9-2

 

S&C “K” Speed
Curve Type Device Type TCC Number PDF Excel
Minimum Tripping S&C Overcurrent Control TCC Number 681-9
Total Clearing S&C Overcurrent Control TCC Number 681-9-2

 

Tap Interrupter Speed
Curve Type Device Type TCC Number PDF Excel
Minimum Tripping S&C Overcurrent Control TCC Number 685-9
Total Clearing S&C Overcurrent Control TCC Number 685-9-2
Instantaneous S&C Overcurrent Control TCC Number 695-9-2
Definite-Time Delay Speed S&C Overcurrent Control TCC Number 696-9-2
Instantaneous and
Definite-Time Delay Speed		 S&C Overcurrent Control TCC Number 697-9-2

 

Main Interrupter Speed
Curve Type Device Type TCC Number PDF Excel
Minimum Tripping S&C Overcurrent Control TCC Number 690-9
Total Clearing S&C Overcurrent Control TCC Number 690-9-2
Instantaneous S&C Overcurrent Control TCC Number 695-9-2
Definite-Time Delay Speed S&C Overcurrent Control TCC Number 696-9-2
Instantaneous and
Definite-Time Delay Speed		 S&C Overcurrent Control TCC Number 697-9-2

 

Moderately InverseStar Speed (U.S., U1)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 691-9-U1

 

InverseStar Speed (U.S., U2)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 691-9-U2

 

Very InverseStar Speed (U.S., U3)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 691-9-U3

 

Extremely InverseStar Speed (U.S., U4)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 691-9-U4

 

Short-Time InverseStar Speed (U.S., U5)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 691-9-U5

 

InverseStar Speed (I.E.C., C1)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 692-9-C1

 

Very InverseStar Speed (I.E.C., C2)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 692-9-C2

 

Extremely InverseStar Speed (I.E.C., C3)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 692-9-C3

 

Long-Time InverseStar Speed (I.E.C., C4)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 692-9-C4

 

Short-Time InverseStar Speed (I.E.C., C5)
Curve Type Device Type TCC Number PDF Excel
Average Tripping S&C Overcurrent Control TCC Number 692-9-C5