Mastervolt AC Master 12/2500 Manual Del Usuario página 23

Parallel configuration
Two configuration options are available for parallel usage:
1. Without an external AC power source
2. With an external AC power source
WARNING!
Do NOT use the internal AC transfer system as described in section 7. Automatically
switching between different power sources (e.g. inverter and utility grid) must be
achieved by adding an external transfer system (e.g. MASTERVOLT Masterswitch 0).
Make sure that the parallel configuration meets the following requirements:
Maximum number of 15 units.
Only hardwired AC connections.
Neutral grounding, if needed, is connected externally:
- Make sure that the internal ground cables are not connected.
- Connect the common neutral conductor (N) of the combined AC output to the safety ground
(PE/GND) externally.
- Integrate a ground fault circuit-interrupter (GFCI) in the AC output circuit.
- Refer to locally applicable regulations regarding grounding of autonomous power systems.
Follow these steps for installation of a parallel configuration:
1. Examine the diagram on page 24.
2. Switch OFF all DC- and AC power sources.
3. Switch OFF each AC-Master.
4. Connect AC wiring.
5. Optional: Connect a control panel or
remote switch to the unit that you have
chosen to be the Master, see section 6.
6. Connect DC wiring.
7. Connect CAN cabling (CAT5 ethernet
cable (straight through)) and activate CAN
termination by placing a jumper at the start
and at the end of the CAN-bus.
8. Assign one unit to be Master.
9. Assign the other units to be Slave.
10. Set each unit to the same output voltage
and -frequency.
11. Check all wiring. Disconnect any connected internal ground cables, see picture.
12. Place the inverter fuse.
13. Switch ON the DC power source.
14. Switch ON each AC-Master. In case of remote operation choose REMOTE on the Master unit.
WARNING!
Do not remove any CAN connections during operation.
Be aware that Power saving mode is not available.
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ENGLISH