ESAB LHJ 750, Инструкция по эксплуатации, Страница: 17 / 44

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LHJ 750
6) INSTALLING
6.1) Receiving
When you receive a LHJ 750, remove all packaging which involves the equipment and check for possible
damage which could have happened by handling. Any complaints as to damage in shipping must be
directed to the carrier company.
Carefully remove any obstacle to the cooling air.
Note : In case a LHJ 750 is not installed immediately, keep it in the original
packaging or stock it in a dry and ventilated place.
6.2)Working place
To have a safe and efficient operation many factors must be considered to determine where the welding
machine should be installed. Proper ventilation and cleanliness are necessary to cool the equipment and for
the operator's safety.
It is necessary to leave some room around the LHJ 750 with at least 700 mm width for ventilation, operation
as well as preventive or corrective maintenance.
Installation of any device to filter ambient air reduces the air volume available for machine refrigeration and
can cause internal components overheating. Installation of any filtering device non authorised by the
supplier cancels equipment warranty.
6.3) Power supply
The requisites for voltage supply are indicated in the nominal board. LHJ 750 is designed to operate with
three-phase 220, 380 or 440 V in 50/60 Hz.They must have an independent feeding line with full capacity to
assure its best performance and reduce possible welding failures or damage caused by other equipment
such as resistance welding machines, impact presser or electrical engines, etc.
For power supply of a LHJ 750 the operator can use the supplied input cable (4 conductors - 3 feeders and 1
grounding) or another one similar links with desired length. Be sure it has 4 conductors - 3 feeders and 1
grounding. In any situation power supply must be through a properly dimensioned exclusive switch with
protection fuses and circuit breakers.
Table below gives information for dimensioning cables and line fuses; eventually consult with local rules.
LHJ 750 is supplied to operate from a 440V input .In case your input is different, primary connections must
be changed as indicated in the electrical scheme (see page 10). Removal of left cover primary connections
gives direct access to terminal bars of primary connections.
TABLE 6.1
220 35 140
440 35 70
LHJ 750
380 35 81
160
90
100
Feeding
Voltage
(V)
Model Consume in
nominal load
(A)
Feeding
Conductors
(copper - mm )
2
Retard
Fuses
(A)