Lincoln Electric POWERTEC 305S Operator's Manual page 7

The allowable input voltages are 3x230V 50/60Hz and
3x400V 50/60Hz (400V: factory default). For more
information about input supply refer to the technical
specification section of this manual and to the rating
plate of the machine.
If it is necessary to change the input voltage:

The input cable must be disconnected from the
mains supply and the machine switched OFF.

Remove the left side panel from the machine.

Reconnect X11 and X12 according to the diagram
below:
400V
X11
X12
W W V V U U
230V 230V 0 0 400V 400V
Y Y X X Z Z
Figure 1.

Replace the left side panel.
Make sure that the amount of mains power available
from the input supply is adequate for normal operation of
the machine. The necessary delayed fuse (or circuit
breaker with "D" characteristic) and cable sizes are
indicated in the technical specification section of this
manual.
WARNING
When powering welder from a generator be sure to turn
off welder first, before generator is shut down, In order to
prevent damage to welder!
Output Connections
Refer to point [2], [3], [4] and [5] of the Figure 2.
Controls and Operational Features
1. Power Switch ON/OFF (I/O): Controls the input
power to the machine. Be sure the power source is
connected to the mains supply before turning power
on ("I"). After input power is connected and the
power switch is turned on, the indicator will light up to
indicate the machine is ready to weld.
2. High Inductance Negative Output Socket: For
the work lead connection.
Low Inductance Negative Output Socket: For
3.
the work lead connection.
4. Wire Feeder Receptacle: 14-pins receptacle for wire
feeder. Provides connections for auxiliary power of
wire feeder.
5. Positive Output Socket: For the source/wire feeder
cable connection.
6. Welding Load Voltage Switch: Adjust the welding
load voltage.
English
230V
X11
W V U
X12
230V 0 400V
Y X Z
7. Wire Feeder Voltmeter Switch: This switch selects
the polarity of the wire feeder voltmeter, if so
equipped. When the welding torch is positive (MIG,
Outershield and some Innershield processes), set
the switch to "+". When the welding torch is negative
(most Innershield applications), set the switch to "-".
POWERTEC 305S
6
5
365S, 425S, 505S
6
5
8. Fuse: Use slow-blow fuse:
305S 365S
2A 3A
9. Power Lead (5m): Connect the supply plug to the
existing input cable that is rated for the machine as
indicated in this manual, and conforms to all
applicable standards. This connection shall be
performed only by a qualified person.
10. Cooler Power Supply Socket: For supplying the
cooler unit only.
The socket has an output of 230V, 2.5A and is protected
by the circuit breaker [11].
5
1
3
2
4
POWERTEC
B
C
A
1
3
2
4 7
Figure 2.
POWERTEC
425S
3A
WARNING
505S
3A
English