Control Concepts FUSION Series - APPENDIX B: Changing from 4 Wire Wye to Delta or 3-Wire Wye Load

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Compact FUSION Installation Manual Revision 3.50.2

STEP

Changing the internal wiring from a 4 Wire Wye to a

Delta or 3 Wire Wye load can easily be done in the field.

First the line power and the control power must be OFF.

Use a screw driver to remove all of the lids. There are

three boards connected together, a Control board and

two Gate Driver boards. It is important to not remove the

flat flex (white) cables.

STEP

Gently remove the 4 Wire Wye wire harness from the

top of Gate Driver boards by simply pulling up on the

connectors. Do not pull on wires. Label as 4 wire wye

and save the wire harness for future use. Connectors to

be removed are marked with green arrows. The Ref wire

on the terminal block will also need to be disconnected

before the wire harness may be removed.

The silk screen next to the connectors will read P3 (2

pin), P16 (2 pin), P9 (2 pin), P11 (3 pin), P8 (3 pin) and

P10 (3 pin). On one of the boards P8 and P10 will not be

populated.

STEP

Place the Delta or 3 Wire Wye wire harness on the

connectors. Match the 2 pin connectors of the wire

harness to the 2 pin connectors of the Gate Driver

board. Similarly match the 3 pin connectors together. To

wire the load refer to the Three Phase 3 Leg section of

the manual.

APPENDIX B:

Changing from 4 Wire Wye

to Delta or 3-Wire Wye Load

NOTE: Delta loads and 3 Wire Wye loads use the same wire harness.

After changing wire harness, change the load type in the FUSION

Control Panel software.