DEMAG DC-Com 1, Руководство по эксплуатации

Страница: 33 / 116

Switch off the electric power supply before starting work. The mains connection or isolating switch must be pro‐
tected against unauthorised or accidental restoration of the power supply by means of a padlock.
Mechanical safety
All bolted connections must be correctly tightened.
Self-locking nuts must not be replaced by other types of nut. Self-locking nuts must be replaced when they have
been tightened and untightened five times. The clamping torque of a self-locking nut must not be lower than the
loosening torque specified by EN ISO 2320.
A sufficiently secure connection can only be guaranteed by tightening to the specified tightening torque.
Bolted connections must not be lubricated as otherwise the specified tightening torque values will be too high.
Check to ensure that pin connections are correctly fitted.
All installation and assembly work must be completed in accordance with the operating instructions and the hoist
chain must be greased. Operation with defective or damaged chains results in a high risk of accidents with per‐
sonal injuries and damage to the chain hoist and is therefore prohibited.
Any change or modification which prejudices safety must be reported to the nearest person responsible immedi‐
ately. Repairs may only be carried out by experienced technicians.
Ensure that all attachment points are freely accessible for inspections and servicing or that free access can be
provided.
The control device (e.g. control pendant) must be marked in such a way that the direction of movement is clear
and distinct. The arrow symbol on the switching elements must correspond to the direction of movement.
Electric safety
The chain hoist operating instructions must be referred to when Demag chain hoists are used.
These operating instructions only contain standard circuit diagrams. Depending on the chain hoist type, an order-
specific circuit diagram may apply.
Protective earth conductor
The protective earth conductor in insulated leads and cables must be coloured green and yellow along its entire
length.
The protective earth conductor must not be connected to mounting bolts or screws.
Earth junctions and connections must be protected against accidental loosening (e.g. by using serrated lock
washers to DIN 6798). It must be possible to disconnect each individual connection.
Protective earth conductors must not carry any current in normal operation.
The same number of protective earth connection points must be provided as electric power infeed and outfeed
points.
Continuity of the PE conductor connection must be checked.
Mains connection switch
A mains connection switch must always be provided for the mains power supply line to the machine. The mains
connection switch must be arranged to disconnect all poles of your DC-Com chain hoist from the mains supply.
Ensure that the mains connection switch is installed in an easily accessible position in the vicinity of your machine
and that it is clearly marked.
Isolating switch
If two or more lifting appliances are fed from a common supply line, each one should be provided with an isolating
switch. This makes it possible to carry out maintenance work on individual units, without affecting operation of the
rest of the system.
Power supply
The power supply line/cable to be used depends on the motor size, see the "Hoist motor data" section.
214
80
2 44/291
113
33