Siemens MJ-5 Installation And Operation Manual page 70

D.3.2.2 Multiple Utility Windings
Regulators with more than one utility winding utilize the
"A" phase utility winding for control and motor power, and
Figure D.6 U2 Connects to a "U" Terminal (U7 or U8) which is to the Left of E2
Figure D.7 U2 Connects to a "U" Terminal (U7 or U8) which is to the Right of E2
Siemens Industry, Inc.
Appendix D: Menu Parameters
the "B" and "C" phase windings for fan(s) power. For this
case, use the Single phase procedure, defined above for the
"A" phase winding.
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