en
67
– The other DC circuit breakers and all AC circuit breakers in the Compact Station
remain switched off.
9. Switch on the AC generator.
– The external conductor voltages must correspond to the nominal mains voltage
and frequency (3 x 280 V
AC
/ 50 Hz).
10. Switch on the main switch.
– The inverter starts and, after about 30 seconds, switches to (simulated) mains
operation.
11. Check that the control voltage of the AC contactor is 24 V
DC
.
12. Now increase the voltage or the frequency of any one phase to just under the set limit
(for limit values, see Section 13).
ATTENTION!
Possible damage to the inverter!
■
■
Never set the test voltage to a value higher than 364V (130% of the
nominal voltage). The measuring circuits of the inverter may become
damaged.
13. Slowly increase the phase voltage or the frequency beyond the limit.
14. Check that the grid monitoring function of the inverter reacts appropriately: the mea-
sured control voltage of the AC contactor must drop to 0 V.
– The test for power unit LT1 is complete when the control voltage of the AC con-
tactor drops.
15. Switch off the main switch.
16. Switch off the AC generator.
17. Switch off the DC circuit breaker Q4.
– [power unit LT2: DC circuit breaker Q5]
– [power unit LT3: DC circuit breaker Q6]
– all DC circuit breakers are switched off
18. Remove the AC generator and the DC voltmeter from the inverter.
19. Slide the 4 slide switches of the test contacts back into the upper position and screw
them down firmly.
20. If required, repeat the test for power units LT2 and LT3: in each case start with step
3 of these instructions. Follow the instructions in the square brackets.
21. Remove all tools from the inverter.
22. Attach the covers and close the inverter.
23. Switch on the Compact Station as described in Section 6.1.
