Mastervolt AC Master 12/2500 Manual Del Usuario página 25

3 phase configuration
Two configuration options are available for 3 phase usage:
1. Without external AC power sources
2. With an external AC power source
WARNING!
Do not use the AC input mode as described in section 7. Automatically switching
between different power sources (e.g. inverter and utility grid) must be achieved by
adding an external 3 phase transfer system.
Make sure that the 3 phase configuration meets the following requirements:
Maximum number of 3 units (one unit per phase).
Only hardwired AC connections.
For neutral grounding:
- 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 combined AC output circuit.
- Refer to locally applicable regulations regarding grounding of autonomous power systems.
The phases are connected in the correct order. The AC Master is not able to detect if the phase
configuration is incorrect.
Follow these steps for installation of a 3 phase configuration:
1. Examine the diagram on page 26.
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 CAN termination.
8. Assign unit to be Master or Slave:
L1 Master (0°)
L2 Slave (-120°)
L3 Slave (120°)
9. Set each unit to the same output voltage
and -frequency.
10. Check all wiring. Disconnect any connected internal ground cables, see picture.
11. Place the inverter fuse.
12. Switch ON the DC power source.
13. Switch ON each AC-Master.
WARNING!
Do not remove any CAN connections during operation.
Be aware that Power saving mode is not available.
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ENGLISH