Theory of operation, V300-pro, Input line voltage & auxiliary transformer – Lincoln Electric INVERTEC V300-PRO SVM105-B User Manual

Page 24

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V300-PRO

THEORY OF OPERATION

INPUT LINE VOLTAGE & AUXILIARY
TRANSFORMER

The V300-PRO can be connected for a variety of three
phase or single phase input voltages. Power is applied
through the Line Switch to the Input Rectifier and the
Auxiliary Transformer.

The Reconnect Panel has switches to select high or
low operating voltage. The “A” lead must then be set for
the proper input voltage. It is important to set the
switches and “A” lead to the proper positions before
applying input power. Changing the switch position
with the power applied will result in major damage
to the machine

The auxiliary transformer provides 18v.a.c. and
24v.a.c. supplies to the Control and Power Boards. It
also provides 115v.a.c., 42v.a.c. and 24v.a.c. supplies
to the wirefeeder amphenol. (CE machines do not have
115v.a.c. supply)

The Power Board provides a 15v.d.c. supply to the
Control Board and a 24v.d.c.supply to the Driver Board
to operate the Pre-charge Relays.

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