TS_604_01 PowerWave PW3000/TP User Manual UK 5/1/18
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4: Operating procedures
14. The parallel UPS system is now fully operational and providing protected output power.
4.14 Operating a frequency changing system
In a frequency changing system the UPS output frequency is different to its input frequency and therefore it is not possible
to implement any form of bypass circuit.
4.14.1 Frequency changer – starting the UPS
1. Check that all the loads connected to the UPS are turned off.
2. Close the external UPS Input/bypass Isolators as required to connect power to the UPS.
3. If an external battery cabinet is used, close the fused isolator on the back of the battery cabinet together with any
circuit breaker connected in the battery line.
4. On the back of the UPS cabinet, close the input breakers M1 and M2 (position
ON
).
a) The fans will start running.
b) The UPS will perform a self-test and will then display the default menu on the LCD.
5. In the case of a multi-module system repeat the above procedure for ALL modules
6. On the UPS Control Panel, press the
ON/OFF
key for more than one second (on ANY module in a multi-module
system).
a) The alarm buzzer will sound and the UPS will start.
b) After a few seconds, the UPS (system) will switch to its ‘on-line’ mode.
7. Check that the LCD indicates the ‘on-line’ status and no warning alarms are present.
8. The UPS is now fully operational and providing protected output power.
9. You can now switch on the loads.
(If possible, turn on the loads sequentially to prevent any UPS overloads occurring due to combined inrush currents.)
4.14.2 Frequency changer – stopping the UPS
Use this procedure to totally shut down a frequency changer system and its connected load.
1. Turn off the individual load items.
2. On the Control Panel, press the
ON/OFF
key continuously for more than three seconds (on ANY module in a parallel
system).
a) The alarm buzzer will sound for three seconds
b) The output power will be immediately cut-off.
c) The fans will stop.
d) After a few seconds the UPS LCD display will power down.
3. To totally isolate the UPS, open the UPS Input/bypass Isolators and, where used, open the external battery cabinet
fuses/isolator.
WARNING:
With the UPS shut down allow at least 5 minutes for the UPS DC capacitors to discharge
before gaining internal access.
