AEC IST5 Series, Service Manual

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3.2.2 Parallel Connection Procedure
Please read the following instructions before you use the devices in parallel mode.
3.2.2.1 Check if the devices can be used in parallel mode.
1. Be sure that all devices are from the same series and rated the same power.
2. Go to the version screen using menu keys, and check if all devices have the same
firmware.
Main screen > Setup > Version
3.2.2.2 Check the positioning of the devices.
Keep the devices as close to each other as possible. The distance between must not exceed 1
meters.
3.2.2.3 Making the electrical connections
1. Make sure that the devices are turned OFF and have been kept off for at least 5 minutes
before you make any electrical connections.
2. Connect the devices in parallel through the electrical panel. Refer to parallel connection
example (UDD-SD-40E) for detailed connection drawing. Connect each device to
ground using separate cables.
3. Connect each device to ground using separate cables.
4. Make sure that the phases are in the right order. (U
1
-U
2
-…-U
N
), (V
1
-V
2
-…-V
N
), (W
1
-W
2
-
…-W
N
).
5. Check the connections using a multimeter in diode mode;