GE P50 Agile P253 Technical Manual Download

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11 Commissioning Instructions

P50 Agile P253

11-4

P253/EN M/C

COMMISSIONING

The P253 is fully numerical in its design. It has a self-supervision function which continuously keeps
track of its internal hardware and will display a message on the LCD screen if it detects the failure of
any component. Therefore, the commissioning tests are less extensive than those for non-numeric
electronic devices or electromechanical relays.

2.1

Commissioning Test Menu

The IED provides several test facilities under the

COMMISSION TEST

menu heading. There are

menu cells that allow you to monitor the status of the opto-inputs, output relay contacts, and user-
programmable LEDs.

This section describes the commissioning tests available in the IED's Commissioning test menu.

2.1.1

Test Mode

The Test Mode menu cell is used to allow secondary injection testing to be performed on the relay
itself without operation of the trip contacts. It also enables a facility to test the output contacts by
applying menu controlled test signals.

To select test mode, the

Test Mode

menu cell should be set to

Test Mode.

This takes the relay out of

service and blocks the maintenance counters. It also causes an alarm condition to be recorded and
the amber

OUT OF SERVICE

LED to illuminate. This action freezes any information stored in the CB

Condition column and in IEC 60870-5-103 builds changes the Cause of Transmission (COT) to Test
Mode.

To enable testing of output contacts the

Test Mode

cell should be set to

Contacts Blocked

. This

blocks the protection from operating the contacts and enables the test pattern and contact test
functions which can be used to manually operate the output contacts.

When testing is complete the cell must be set back to

Disabled

to restore the relay back to service.

2.1.2

Test Pattern

This cell is used to select the output relay contacts that will be tested when the

Contact Test

cell is set

Apply Test

2.1.3

Contact Test

When the

Apply Test

command in this cell is issued, the contacts set for operation (set to 1) in the

Test Pattern cell change state. After 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 issuing the

Remove

Test

command. The command text on the LCD will again revert to

No Operation

after the

Remove

Test

command has been issued.

2.1.4

Test LEDs

When the Apply Test command in this cell is issued, the

programmable LEDs will illuminate for

approximately 2 seconds before they extinguish and the command text on the LCD reverts to

Operation.

2.1.5

Opto Input Status Check

The

Opto I/P

cell under

SYSTEM DATA

menu can be used to monitor the status of the opto-inputs

while they are sequentially energised with a suitable voltage. The cell is a binary string that displays
the status of the opto-inputs where '1' means energised and '0' means de-energised.