Overcurrent Elements
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Step 9
Set the
Winding 2 Phase TOC Time Dial
.
51P2TD = __________________
For this exercise, set the time dial to 3 to provide time coordination with downstream devices. You can
determine the time dial setting based on a fault coordination study.
Step 10
Verify that the following settings are at the default values:
51P2RS = Y
51P2TC = 1
Step 11
Save your settings, and then send them to the relay.
Hands-On Activity 2: Validate Overcurrent Elements
In this hands-on activity, you will validate the phase and neutral instantaneous overcurrent elements and
the phase time-overcurrent elements.
Validation Functional Description
Figure 4 illustrates the location of Fault F1. The relay should operate when the fault magnitude exceeds
the overcurrent relay setting and the time-delay elements time out.
Figure 4 Overcurrent Validation Fault Location
