P54x/EN CM/La4 Commissioning
(CM) 10-32
MiCOM P543, P544, P545 & P546
CM
6.1.5.3 P592 external wiring
Check that the external wiring is correct to the relevant connection diagram or scheme
diagram. The connection diagram number appears on the rating label under the top access
cover on the front of the P592. The corresponding connection diagram will have been
supplied with the ALSTOM Grid order acknowledgement for the P592.
It is especially important that the dc supplies are wired with the correct polarity.
6.1.5.4 P592 auxiliary supply
P592 u
nits operate from a dc only auxiliary supply within the operative range of 19 V to
300 V.
Without energizing the P592 units measure the auxiliary supply to ensure it is within the
operating range.
It should be noted that the P592 interface unit is designed to withstand an ac ripple
component of up to 12% of the normal dc auxiliary supply. However, in all cases the peak
value of the dc supply must not exceed the maximum specified operating limit.
Do not energize the P592 using the battery charger with the battery disconnected as
this can irreparably damage the unit’s power supply circuitry.
6.1.5.5 P592 light emitting diodes (LEDs)
On po
wer up the green ‘SUPPLY HEALTHY’ LED should have illuminated and stayed on
indicating that the P592 is healthy.
The four red LED’s can be tested by appropriate setting of the DIL switches on the unit’s
front plate. Set the data rate switch according to the communication channel bandwidth
available. Set all other switches to 0. To illuminate the ‘DSR OFF’ and ‘CTS OFF’ LED’s,
disconnect the V.35 connector from the rear of the P592 and set the ‘DSR’ and ‘CTS’
switches to ‘0’. The ‘OPTO LOOPBACK’ and ‘V.35 LOOPBACK’ LED’s can be illuminated by
setting their corresponding switches to ‘1’.
Once operation of the LED’s has been established set all DIL switches, except for the ‘OPTO
LOOPBACK’ switch, to ‘0’ and reconnect the V.35 connector.
6.1.5.6 P592 optical received signal level
With an opti
cal cable connected to the P54x optical transmitter as instructed in section 6.1.2,
discon
nect the other end of the cable from the P592 receiver (RX) and use an optical power
meter to measure the received signal strength. The value should be in the range
-16.8 dBm to -25.4 dBm. Record the measured value and replace the connector to the P592
receiver.
6.1.5.7 P592 loopback
With the
‘OPTO LOOPBACK’ switch in the ‘1’ position the receive and transmit optical ports
are electrically connected together. This allows the optical fiber communications between
the P443 relay and the P592 to be tested, but not the internal circuitry of the P592 itself.
6.1.5.8 P592 optical transmitter signal level
Usi
ng an appropriate fiber optic cable, connect the optical transmitter (TX) to an optical
power meter. Check that the average power transmitted is within the range -16.8 dBm to
-22.8 dBm.
Record the transmit power level.
Connect the appropriate optical fiber to connect the P592 transmitter to the P54x optical
receiver and return to the P54x relay.
To Next Page
Loading...
