Publicidad
Idiomas disponibles
Idiomas disponibles
6.3) Power supply
The power supply voltage requirements are indicated in the nominal board. The LHI´s RECTIFIERS are
projected to operate in a three-phase main power supply of 220/380/440 - in 50/60 Hz.
It should be fed from an independed main supply of adequate capacity, in order to guarantee its perfect
performance and to reduce welding faults and eventual damage caused by other equipment, such as
resistant welding machine, electric engines, etc.
For electric feeding of a LHI RECTIFIER, the user can use the input cable supplied 4 conductors (3 feeding
cables and 1 earth cable) or an appropriate cable with correspondent bifool of desired length and with 4
conductors (3 feeding conductors and 1 earth conductor).
In all the cases above, the electric feeding should be done with a exclusive switch with protective fuses or
circuit breaker properly dimensioned.
The chart 6.1 below gives dimension guide lines of line fuses cases, otherwise check the regulations on force.
TABLE 6.1
Feeding
Model
voltage
LHI 250
The LHI RECTIFIER is supplied to connect in a 440 V main power supply. In case the power voltage is
different, the primary connections should be modified as indicated in the electric circuit diagram.
Remove the right side lid to have access to make any changes in the voltage, this gives direct access to the
board of primary connections terminal.
The earth terminal is connected to the chassi of the RECTIFIERS. It
should be connected to a efficient earth point of the main power
installation. DO NOT connect the earth conductor of the input cable to
any of the bornes of the ON/OFF switch. This puts the machine chassi
under electric voltage hazard.
All the electric connections should be completely fitted so that there is no risk of sparks, overheating or
drops in the circuit voltage.
N.B.: DO NOT USE THE MAIN POWER NEUTRAL FOR THE
EARTH CONNECTION
6.4)Welding circuit
To guarantee a perfect functioning of the LHI RECTIFIER use a work clamp copper cable, isolated and
with the smallest length possible and compatible with its applications considered, in a well kept state and
Nominal load
comsumpton
(V)
(A)
59
220
32
380
28
440
IMPORTANT !
Feeding
Delayed
conductors
fuses
(copper - mm2)
(A)
70
10
50
10
40
10
19
LHI 250
Publicidad
