-15-
•
If M motor is not correctly fed from 3-50Hz; 400V voltage, check motor force circuit:
-
Check the F1 fuse in the motor force circuit. In case one of the fuses is broken, make the necessary
repairs and replace the fuse.
ATTENTION!! Use only calibrated replacing pieces with the parameters indicated.
-
Check if electric stress circuit of the FR thermal relay is not broken.
-
Check if all junction wires and cable of electric stress circuit are not broken.
All necessary checks can be made with a general instrument (multimeter) which measures V,A.
8.5 Maintenance
Weekly checking:
-
Make visual checking of electric apparent condition and in case they are damaged replace them with
others with the same parameters;
-
Tighten the screws of electric connections and the holding screws of electric apparent;
-
Check condition of feeder cable; jack and connecting socket to the mains and in case they are damaged,
replace them with others with the same parameters;
-
Check if earthling circuit has continuity and its ohms resistance;
-
Wipe the dust on the electric apparent and connecting elements. Use a soft brush.
8.6 Labour protection rules
-
Respect all instructions and norms in force when mount, put into service, repair and maintain the electric
installation.
-
Stop the machine and release it from the mains before any intervention to the electric installation or before
periodical checking of electric equipment and motor.
-
All operations which ask the electric installation under voltage (measuring the energy, voltage, determining
succession of phases) will be effected only by skilled people with legal authority. They must have proper
tools equipped with non-conducting handles and non-conductive protection equipment.
It is forbidden to make any modifications to the electric installation. This could lead to dangerous
situations.
8.6.1 M
EASURES TO PROTECT PEOPLE AGAINST ELECTRIC SHOCK
-
All active metallic parts are inside cases. In this way people are protected against danger, which occurs by
touching the parts directly, according to EN 60204 §6.2.1.
-
All active metallic parts are insulted against inactive metallic parts which the people could come in touch
with, according to EN 60204 §6.2.2.
-
Eternal connecting elements, which the people could come in touch with, have the active parts entirely
insulated, according to EN §6.2.2.
-
Galvanic separation of control circuit by transformer, according to EN 60204 §6.3.3.
-
Use of reduced voltage (PELV) of 24V for supply of control circuit, according to EN 60204 §6.4.
-
In order to avoid undesired acting owing to insulation damage, braking or detaching of connections of
conductors in the control circuit, a branch of this circuit is connected to the protection circuit, according to
EN 60204 §8.4.
-
All inactive metallic parts of machine are earned according EN 60204-1 § 5.2., § 8.2.and EN 60445 in
order to protect people against dangerous caused by fault of insulation or accidental touching between
active and inactive metallic parts.
Earthling link between machine and ground clamp of the mains is made by means of feeder cable and
must be checked to be correctly executed. It’s forbidden to put the machine under voltage before
connecting it to the ground clamp of the mains and before verifying the earthling circuit according to
instructions from §8.2.
From time to time it is necessary to check if continuity of earthlings is assured and all instructions form §8.2
are respected.
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