9 Commissioning
PCS-9785 Satellite-Synchronized Clock
9-5
Date: 2019-07-05
9.5.2.1 Front Panel LCD Display
Connect the device to DC power supply correctly and turn the device on. Check program version
and forming time displayed in command menu to ensure that are corresponding to what ordered.
9.5.2.2 Date and Time
If the time and date is not being maintained by substation automation system, the date and time
should be set manually.
Set the date and time to the correct local time and date using menu item "
Clock
".
In the event of the auxiliary supply failing, with a battery fitted on CPU board, the time and date will
be maintained. Therefore, when the auxiliary supply is restored the time and date will be correct
and not need to set again.
To test this, remove the auxiliary supply from the device for approximately 30s. After being
re-energized, the time and date should be correct.
9.5.2.3 Light Emitting Diode
On power up, the green LED "
HEALTHY
" should have illuminated and stayed on indicating that
the device is healthy.
The device has latched signal devices that remember the state of the trip, auto-reclose when the
device was last energized from an auxiliary supply. Therefore, these indicators may also illuminate
when the auxiliary supply is applied. If any of these LEDs are on then they should be reset before
proceeding with further testing. If the LED successfully reset, the LED goes out. There is no testing
required for that that LED because it is known to be operational.
It is likely that alarms related to voltage transformer supervision will not reset at this stage.
Apply the rated DC power supply and check that the "
HEALTHY
" LED is lighting in green. We
need to emphasize that the "
HEALTHY
" LED is always lighting in operation course except that
the equipment find serious errors in it.
Produce one of the abnormal conditions listed in
Chapter "Supervision"
, the "
ALARM
" LED will
light in yellow. When abnormal condition reset, the "
ALARM
" LED extinguishes.
9.6 Final Checks
After the above tests are completed, remove all test or temporary shorting leads, etc. If it has been
necessary to disconnect any of the external wiring from the device in order to perform the wiring
verification tests, it should be ensured that all connections are replaced in accordance with the
relevant external connection or scheme diagram.
Ensure that the device has been restored to service.
If the device is in a new installation or the circuit breaker has just been maintained, the circuit
breaker maintenance and current counters should be zero. If a test block is installed, remove the
test plug and replace the cover so that the device is put into service.
08020
08020
08020
08020
08020
08020
08020
08020
08020