Overcurrent Elements Page 6 of 7 20120723
Hands-On Activity 3: Validate Time-Overcurrent Element
In this hands-on activity, you will validate the Winding 2 time-overcurrent element.
Validate Time-Overcurrent Test Values
The instructor will use the SEL-AMS to inject secondary quantities into the relay terminals to simulate
faults (as indicated in Table 1).
Step 1
Calculate the expected operate time using the equations from Figure 5, and record your answers in
Table 2.
Figure 5 Time-Overcurrent Operation Equations
Table 2 Simulated F1 Values for Element Pickup Test
Element Name
Calculated Operate Time
at Three Times Pickup
Test Time Percentage Difference
51P1T
51P2T
50NN2T
Step 2
Clear the SER entries.
You can perform this task by using either the SER C serial port command or the
ACSELERATOR
QuickSet HMI.
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