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

Chapter 20 - Commissioning Instructions
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
output has operated the command text will revert to No Operation whilst the rest of the auto-reclose cycle is
performed. To test subsequent three-phase autoreclose cycles, you repeat the 3 Pole Test command.
Note:
The default settings for the programmable scheme logic has the AR Trip Test signals mapped to the Trip Input
signals. If the programmable scheme logic has been changed, it is essential that these signals retain this mapping for the
Test Autoreclose facility to work.
3.10

RED AND GREEN LED STATUS CELLS

These cells contain binary strings that indicate which of the user-programmable red and green LEDs are
illuminated when accessing from a remote location. A '1' indicates that a particular LED is illuminated.
438
P14D
P14D-TM-EN-8