Signal Send Test For Permissive Schemes - GE MiCOM P40 Agile Technical Manual

P543i/P545i
12.4.4

SIGNAL SEND TEST FOR PERMISSIVE SCHEMES

This test applies to both Permissive Underreach, and Permissive Overreach scheme applications.
1. Reconnect the test set so that the timer is no longer stopped by the Trip contact, but is now stopped by the
Signal Send contact. This is the contact that would normally be connected to the pilot/signalling channel.
2. Inject a Zone 1 fault, and record the Signal Send contact operating time. The measured operating time
should typically be less than 20 ms for 50 Hz, and less than 16.7 ms for 60 Hz applications.
3. Switch OFF the AC supply and reset the alarms.
12.4.5 SIGNAL SEND TEST FOR BLOCKING SCHEME
1. Reconnect the test set so that the timer is no longer stopped by the Trip contact, but is now stopped by the
Signal Send contact. This is the contact that would normally be connected to the pilot/signalling channel.
2. Inject a Zone 4 fault, and record the signal send contact operating time. The measured operating time
should typically be less than 20 ms for 50 Hz, and less than 16.7 ms for 60 Hz applications.
3. Switch OFF the ACsupply and reset the alarms.
12.4.6 SCHEME TIMER SETTINGS
1. Check that the correct time delay settings have been applied. The relevant settings in the AIDED SCHEMES
column are:
a. tRev. Guard (if applicable/visible)
b. Unblocking Delay (if applicable/visible)
c. WI Trip Delay (if applicable/visible)
2. When the tests are completed, restore all settings that were disabled for testing purposes.
3. Set the Static Test Mode to Disabled.
4. Remove any wires or leads temporarily fitted to energise the channel receive opto-input
P54x1i-TM-EN-1
Chapter 25 - Commissioning Instructions
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