Duty Cycle And Overheating; Output Connections - Lincoln Speedtec 180C Operator's Manual

Duty cycle and Overheating

The duty cycle of a welding machine is the percentage of
time in a 10 minute cycle at which the welder can
operate the machine at rated welding current.
Example: 60% duty cycle
Welding for 6 minutes.
Excessive extension of the duty cycle will cause the
thermal protection circuit to activate.
The machine is protected from overheating by a
temperature sensor.
Input Supply Connection
Only a qualified electrician can connect the welding
machine to the supply network. Installation had to be
made in accordance with the appropriate National
Electrical Code and local regulations.
Check the input voltage, phase and frequency supplied
to this machine before turning it on. Verify the
connection of ground wires from the machine to the input
source. The welding machine SPEEDTEC 180C,
SPEEDTEC 200C must be connected to a correctly
installed plug-in socket with an earth pin.
Input voltage is 230V, 50/60Hz. For more information
about input supply refer to the technical specification
section of this manual and to the rating plate of the
machine.
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 "B" characteristic) and cable sizes are
indicated in the technical specification section of this
manual.
The welding machine can be supplied from a power
generator of output power at least 30% larger than input
power of the welding machine.
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 points [7], [8] and [9] of the Figures below.
Controls and Operational Features
1. LED Indicator Power switch (only
SPEEDTEC 180C): This LED lights up
when the welding machine is ON and is
ready to work
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Break for 4 minutes.
WARNING
WARNING
WARNING
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4
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2. Thermal Overload Indicator: It indicates that the
machine is overloaded or that the cooling is not
sufficient. Depending on:
SPEEDTEC 180C: Overload or
insufficient is shown by lighting LED
under the symbol.
SPEEDTEC 200C: The message as
image is shown by the display [13].
3. Process Welding's Switch:
GMAW (MIG/MAG) process
Warning: Can be used to FCAW-
SS process.
SMAW (MMA) process
When the machine is switched again on, last welding
process will be recalled.
If the push-button is pushed in GMAW process in, the
output terminals will lived.
During SMAW process, the output terminals are still
lived.
3
SPEEDTEC 180C
8 9
Figure 1.
WARNING
WARNING
WARNING
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6
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