Weldmatic 140i
Model No MC104, Iss A 09/15
9
6 Installation
Connection to Electrical Mains Power
Supply
The Weldarc 140i is fitted with a 10 Amp
plug and socket.
The minimum capacity of the main power
supply wiring and power outlet supplying a
welder is selected according to the Effective
Primary Current of the equipment. Refer to
Section 3.
The minimum recommended main power
supply circuit breaker ratings for Weldarc
inverters are listed in Section 3.
The current rating of the mains cable
depends on cable size and method of
installation. Refer to AS/NZS 3008.1, Table 9.
If it becomes necessary to replace the mains
flexible supply cable, use only cable with
correct current rating. See Section 3.
If it is necessary to use an extension power
supply cable, ensure that it is rated as per
Section 3. Voltage drop which will occur over
long lengths of cable will reduce the quality
of welds and the maximum welding current
available from the equipment.
As noted previously, it is not recommended
that the Weldarc inverter be powered from
small engine-driven generator sets unless
they have adequate voltage regulation. Poor
regulation results in peaks of supply voltage
which can occur with some equipment
of this type. Excessive voltage peaks can
damage the circuits of the welder.
7 Basic Welding Information
Stick Welding (MMAW)
Connection for Stick Welding
It is important to select the electrode polarity
in accordance with the manufacturers
recommendations for that electrode. Most
common electrodes, including cellulose
types, are operated with the electrode at
positive polarity, as illustrated in Figure 3.
Fig 3
Connections for Stick Welding (MMAW),
Electrode Positive
Stick Welding
Be certain that you are wearing suitable
protective clothing, gloves etc and that you
are working in a non-hazardous area. If
necessary, refer again to
Section 1
-
Safe
Practices
in this manual.
Connect the work clamp to the work piece.
Place the desired electrode in the electrode
holder.
Turn on the power switch located on the rear
panel. Wait approximately 5 seconds as the
unit goes through its initiation sequence.
Use the Weld Mode Selection Switch to
select Stick Mode.
Work clamp
To electrode
holder
(-) output terminal
(+) output terminal
