Cutmatic 45
Model MC108-0 Iss A
9
6 Installation
Connection to Electrical Mains Power
Supply
The Cutmatic 45 is fitted with a 15 Amp
plug, recognisable by a wide earth pin.
Power supply authorities require that
equipment fitted with a 15 Amp plug shall
ONLY be connected to a 240 Volt, 15 Amp
power point. DO NOT modify the plug.
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 the
Cutmatic 45
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
maximum welding current available from the
equipment.
Successful Operation
Welding Equipment at maximum output
require high current during operation, then
minimum current during idle time.
Mains supply circuit breaker tripping can
sometimes occur.
Successful operation will depend on a
number of factors:
• Variation in circuit breaker thresholds.
• Ambient temperature.
• Number of previous circuit breaker
operations.
• Actual weld conditions, resulting in
higher weld currents.
• Repeated starts can result in repeated
surge currents raising circuit breaker
threshold.
Repeated Circuit breaker operation at weld
start can sometimes be overcome by using a
“D” curve circuit breaker.
To reduce nuisance tripping, a higher
rated circuit breaker can be selected, but
the supply circuit wiring capacity must be
increased to suit.
Connection to Generator
The Cutmatic 45 can be operated from a
generator. The PFC feature will allow greater
tolerance to variable generator outputs.
However, it is not recommended that the
equipment 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.
Generators used to power this equipment
must have the recommended minimum
capacity and incorporate output voltage
regulation.
Due to variation between generators by
different manufacturers, it is impossible
for WIA to validate operation from all
generators. Therefore, correct operation of
welding equipment on the generator should
be confirmed by the manufacturer, before
purchasing the generator.
