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Test Mode Cell; Test Pattern Cell; Contact Test Cell; Test Leds Cell - GE MiCOM P40 Agile Technical Manual

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Chapter 21 - Commissioning Instructions
3.5

TEST MODE CELL

This cell allows you to perform secondary injection testing. It also lets you test the output contacts directly by
applying menu-controlled test signals.
To go into test mode, select the Test Mode option in the Test Mode cell. This takes the IED out of service causing
an alarm condition to be recorded and the Out of Service LED to illuminate. This also freezes any information
stored in the CB CONDITION column. In IEC 60870-5-103 versions, it changes the Cause of Transmission (COT) to
Test Mode.
In Test Mode, the output contacts are still active. To disable the output contacts you must select the Contacts
Blocked option.
Once testing is complete, return the device back into service by setting the Test Mode Cell back to Disabled.
Caution:
When the cell is in Test Mode, the Scheme Logic still drives the output relays, which
could result in tripping of circuit breakers. To avoid this, set the Test Mode cell to
Contacts Blocked.
Note:
Test mode and Contacts Blocked mode can also be selected by energising an opto-input mapped to the Test Mode
signal, and the Contact Block signal respectively.
3.6

TEST PATTERN CELL

The Test Pattern cell is used to select the output relay contacts to be tested when the Contact Test cell is set to
Apply Test. The cell has a binary string with one bit for each user-configurable output contact, which can be
set to '1' to operate the output and '0' to not operate it.
3.7

CONTACT TEST CELL

When the Apply Test command in this cell is issued, the contacts set for operation change state. Once the test
has been applied, the command text on the LCD will change to No Operation and the contacts will remain in the
Test state until reset by issuing the Remove Test command. The command text on the LCD will show No
Operation after the Remove Test command has been issued.
Note:
When the Test Mode cell is set to Contacts Blocked the Relay O/P Status cell does not show the current status of the
output relays and therefore cannot be used to confirm operation of the output relays. Therefore it will be necessary to monitor
the state of each contact in turn.
3.8

TEST LEDS CELL

When the Apply Test command in this cell is issued, the user-programmable LEDs illuminate for approximately
2 seconds before switching off, and the command text on the LCD reverts to No Operation.
3.9

TEST AUTORECLOSE CELL

Where the IED provides an auto-reclose function, this cell will be available for testing the sequence of circuit
breaker trip and auto-reclose cycles.
The 3 Pole Test command causes the device to perform the first three phase trip/reclose cycle so that
associated output contacts can be checked for operation at the correct times during the cycle. Once the trip
492
P14x
P14xEd1-TM-EN-1

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