Regular Servicing - Leroy-Somer FLSE Ex e Recomendaciones Específicas: Instalación Y Mantenimiento

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• The choice of connecting cables is determined by the current, voltage, length, the temperature, "T.cable" (if
present on the motor nameplate).
• The connection must satisfy the installation rules dictated by the standards and the application of current
regulations and must be performed under the responsibility of a qualified person who must ensure:
- the conformity of the junction box (mode of protection Ex, IP, IK, etc.),
- the conformity of the connection to the terminal and the tightening torques,
- the minimum air distances imposed by the standardisation are respected; if the anti-rotation is not performed by the
connection element, by isolating each power cable ring terminals using a pasted heat-shrinkable sheath. This
sheath must cover the cable over a length of at least 15mm. From each terminal, place the cables with their lugs in
parallel to implement maximum isolation distances.
• The screws used to connect the cables must be the same type as the cable terminals or isolating rods (do not fit
steel screws on brass terminals, for example).
• Earthing of the main and any auxiliary motor is compulsory and must be performed in accordance with current
regulations.
• A safety device certified compliant with the ATEX94/9/CE directive must ensure power-off within a time below t
E
on the motor nameplate, if blocking the rotor.
• When the motor is fitted with auxiliary ventilation, this must be of a type certified by the group, the application
(Gas or Gas & Dust) and the temperature class must correspond at least to that of the main motor. The power
supplies to the 2 motors must be connected so that the powering up of the main motor is subordinate to the
powering up of the auxiliary motor. Shutting down the auxiliary motor must also shut down the main motor. The
installation must contain a mechanism that prevents the main motor from operating if there is no ventilation.
• In S1 service, 3 successive start-ups from cold and 2 from hot are accepted for the machine. The maximum
number of start-ups within the same hour is 6. In frequent or difficult starting conditions, motors must be fitted with
thermal protection (consult us).
• The thermal probes internal to the equipment, when mandatory (ensuring that the maximum surface temperature
is never reached), must be connected to a device
• To ensure that the maximum surface temperature is never reached, the thermal sensors fitted on the motor must
be connected to a device which switches off the motor. This device must be in addition to and functionally
independent of any system which could be required for operational reasons in normal conditions
• Any reheating resistances (or reheating by injection of direct current or low voltage alternating current) must only
be supplied when the motor is powered down and cold; their use is recommended for an ambient temperature
of < -20°C.
• When fitting one or more vibration sensors or accessories (pulse generator for example) these should be
connected in a box. All of these accessories (as well as the box if it is not placed outside an explosive atmosphere)
must be of a type certified by the group, the application (Gas or Gas & Dust) and the temperature class must
correspond at least to that of the motor. The instructions in their instruction manuals must be respected when they
are installed.
• The motor supplied by a separate frequency inverter placed outside the zone or used where there is an
insufficient flow of air or which may be adapted to be no longer self-ventilating or fitted with an anti-drift device,
must be fitted with thermal sensors in the winding (all frame sizes), on the DE bearing (frame size 160 upwards),
and possibly on the NDE bearing.
• The bearings may be insulated electrically; their marking is engraved on the nameplate.
• The frequency inverters authorised for the (F)LSE and (F)LSN motors appear in the table associating the
inverters with the ST1008 motors.
In the applications with braking (lifting or maintenance) or when the network power supply voltage is greater than
415V, LEROY-SOMER recommends the use of FLSD motors; alternatively LEROY-SOMER proposes in (F)LSE
and (F)LSN "reinforced insulation" which may be, depending on the height of the frame size, a moulding or over-
insulation.
• When a drive is used, any special instructions detailed in the specific drive manual must be complied with.
• When several motors are supplied by the same drive, provide individual protection on each motor starter
(thermal relay) for safety reasons.

REGULAR SERVICING

• The frequency of inspections depends on the climactic and specific operating conditions and will be established
after one year of use.
• At least once every six months, drain any condensation water from the lower points of the casings by opening
and cleaning them and replacing the plugs with new seals.
• When closing the junction box, make sure that all the waterproof seals are positioned correctly and that the
screws are properly tightened in order to guarantee the IP protection level marked on the nameplate.
• Remove dust from the machine frequently from casing and the cover openings and air outputs (risk of increased
surface temperatures): clean at low pressure from the centre to the edges of the machine.
Unless prior agreement is received from the manufacturer, any intervention which may affect the safety of
the motor is performed under the responsibility of the operator. The repairs must be carried out by an
ATEX-approved repair specialist.
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