Working Area; Power Supply - ESAB LHI 425 Manual Do Usuário E Pecas De Reposicao

6) INSTALLATION
6.1) Receiving the equipment
At receiving a LHI RECTIFIER remove all the packaging material around the unit and check for possible
damages that could have happened during transport. Any complaints related to transport damage should
be directed to the Transport Company.
N.B.: In case a LHI RECTIFIER is not installed immediately, keep it in its
original packaging or store it in a dry and well ventilated place.

6.2)Working area

Several facts should be taken into consideration when determining the working place of a welding machine,
in order to have a safe and efficient operation.
An adequate ventilation is needed for the refrigeration of the equipment and for the operator´s safety. The
area should be kept clean.
A circulation corridor should also be left around the LHI RECTIFIER with at least 700mm wide to provide
ventilation and access for operation, preventive maintenance and eventual corrective maintenance.
The installation of any filter dispositive in the environment restricts the air volume availabe for the machine
refrigeration which can cause overheating to the internal equipment.
All guarantee undertakings from the supplier cease to apply if the customer/user installs any filter
dispositive not authorized by the supplier.

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 220/380/415/440 - 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
Model
LHI 425
22
LHI 425
Feeding Nominal load
voltage comsumpton
(V) (A)
75
220
380 47
43
415
40
440
Feeding Delayed
conductors
(copper - mm²)
10
10
10
10
fuses
(A)
90
60
60
50