DENGENSHA WS-100, Инструкция по эксплуатации

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5
DENGENSHA
(3) Perform maintenance work
Installation, maintenance/inspection, repair work should be performed by trained
qualified personnel
2)
according to the instruction manual for safety reasons.
Note
：
2) Qualified personnel, authorized by the customer, who have received
manufacturer’s or customer’s in-house training and have clear understanding of the
equipment in question.
(4) Perform periodic maintenance
It is necessary to perform periodic maintenance and inspection of the equipment as
described in the manual.
(5) Water or pneumatic hoses
When the customer prepares to install water, or pneumatic hoses to the welder, make sure
they will sufficiently bear the pressure.
Possibilities of danger occur when these hoses have insufficient resistance to pressure or
are deteriorated or damaged, periodically perform maintenance and inspection and repair
the deteriorated or damaged parts before using the equipment.
(a) When hoses bursts or disconnected, the hose may act violently or the equipment may
operate unexpectedly.
(b) When a water hose bursts developing a leak, there is a possibility of deteriorated
insulation of the electrical circuit or deterioration of the control equipment and/or
current leakage.
1 - 7. Accident prevention
(1) Cooling water used for welding machine
Be sure to observe the following items for safe operation, to prevent accident and
maintain proper functioning of the equipment.
(a) Use water of the following quality or equivalent
：
i)
Rate of electric resistance
：
More than 5,000Ω
･
cm for thyristor cooling water.
ii)
Less deposit in water.
iii) Ammonium ion content must be less than 1ppm.
Smaller resistance of water may cause current leakage. The cooling water with large
deposits may clog a circuit to degrade the circuit function, lowering the cooling capacity
and causing the circuit to malfunction or fail.
Cooling water containing a large amount of ammonium ions may have the possibilities of
corroding copper or copper alloy components on the cooling circuit and create water leaks,
leading to current leakage and electrical shock or electrical breakdown of welding
transformer that can causes a fire on the equipment.
(b) When the cooling water is turned off, be sure to turn off the welding power supply.
Leakage current flowing for a long time may heat and damage thyristors,
depending on quality of cooling water.