Matco Tools M148 - Installation and Adjustment Procedures; Technical Specifications and Parameters; Duty Cycle and Overheating Protection

INSTALLATION AND ADJUSTMENT
9
§3 Installation and Adjustment
§3.1 Parameters
Model
Parameters
M148 (110VAC) M208 (220VAC)
Input Voltage
（
V
）
1~110/115±10% 1~208-240±5%
Input Current
（
A
）
20 (max.) 20 (max.)
Input Power
（
KW
）
4.2 5.7
Welding
Current
（
A
）
35~140 50~200
No-load
Voltage
（
V
）
48 57
Duty cycle
（
4
0℃）
40%130A 100%95A
25%200A 100%120A
Diameter(mm)
Fe
：
0.6/0.8/0.9 SS: 0.6/0.8/0.9 Flux-Cored
：
0.8/0.9/1.0
Protection
class
IP23
Insulation
class
H
Dimensions
（
mm
）
465*214*395 465*214*395
Weight
（
Kg
）
12.5 Kg.
Note: The above parameters are subject to chan.
§3.2 Duty cycle and Over-temp
The rated duty cycle is defined as the proportion of the time that a machine can work
continuously over a 10 minute cycle when set at 100% of rated output welding current in 40C
(104F) ambient environment.
When the transformer reaches an over-heat condition, the heat sensor inside it will open and
will output an instruction to circuit board to cut AC relay and the output welding current while
illuminating the over-heat pilot lamp in the front panel. At this time, all welding operations should
cease for 15 minutes allowing the cooling fan to reduce the temperature. The unit will auto-reset
when correct temperature has been achieved and pilot light will go out. If the machine reached
the over-temp capacity again, the welding output current or the arc cycle should be reduced.