PLC - Power Line Controller
The machine with PLC has a key socket in the back panel.
Held one copy of the key in a safe place (if both the key are lost, the complete key block must be replaced).
The domestic (inside houses) power supply
is limited at 16A; to use the machine in that
condition, t set the key on 16A position.
Use the key to select the power supply
range.
Note: The plug used in the supply cable of the machine must be an industrial plug ≧25A, when the machine is
used at maximum power. The PLC key must be positioned on 25 A (industrial applications).
Don’t use the 16A plug for industrial applications.
The key must be removed from the machine after the power supply setting.
PLC FUNCTION
The Ter 166 and Ter 186 series are industrial power sources for light/medium applications; the duty cycle is very
high and the design of the power inverter allows hight current rates. When the machines are connected to the
domestic (house) power supply a plug 16A should be mounted; the input current must be less than average 16A in
order to avoid the switching-o of the main switch protecting the power line.
The PLC feature controls the input current, automatically inhibiting the welding process when the power input rise
the limit of the main line switch (16A).
The power of the machine isn’t reduced, only the welding time (duty cycle) is concerned when the current is
highter than the available one from net, as shown in the picture below, where we compare the available welding
time in function of the welding current between industrial (red plot) and domestic (green plot) for a mig setting.
LIMITATION OF THE WELDING TIME WITH PLC
10
100
1000
100 110 120 130 140 150 160 170 180 190 200
CURRENT
sec.
