Before Installation; Mechanical Installation; Electric Connection - Nidec Leroy-Somer LSPX Manual De Instrucciones

3-phase asynchronous motors for
en
EXPLOSIVE ATMOSPHERES
DUST

BEFORE INSTALLATION

• The user shall assess the electrostatic risks to meet the requirements of the CEI/TS 60079-32-1 guide.
• Check compatibility between the indications on the nameplate, explosive atmosphere, zone of use, ambient
temperature and the temperature class.
• The motors must be stored in their original packaging and in premises protected against moisture (HR<90%)
and vibrations.
- Motors fitted with lifetime greased bearings: maximum storage time = 2 years; beyond this time, replace the
bearings with identical ones.
- Motors fitted with greasers (see general manual ref. 5725).
• Check that the ventilation cover has no traces of impact.

MECHANICAL INSTALLATION

• The motors are factory-fitted with guidance labels which must be left in place.
• Before commissioning, drain any condensation water from inside the motors (see § «Regular servicing»).
• Monitor the state of the seals and replace them periodically if necessary (minimum once per year for the Ex tb
and Ex tc motors). After any work involving dismantling the motor replace all the weatherproof seals with new
seals after cleaning the parts. Where the shaft crosses, make sure that the seals are not damaged on contact
with the key entries and shoulders.
• The belts must be anti-static and flame-resistant.
• Protect the passage seals from light.
• When the motor runs in a position in which its shaft end opposite the fan turned downwards, the front bearing
shall be fitted with a thermal probe.

ELECTRIC CONNECTION

• Unused cable or duct entries must be replaced by screwed plugs of a type approved or certified for the
group, the application (gas or/and dust) and temperature class corresponding to those of the unit's location as a
minimum. Their fitting shall comply with the instructions in their instruction manuals.
• As opposed to the attached cable(s), the motor must either be connected outside an explosive atmosphere,
or be protected by a type of protection adapted to the group, the application and the temperature class which
correspond at least to those of the location of the appliance (see the indications on the motor nameplate).
• The supply voltage and frequency must conform to those indicated on the motor nameplate.
• For motors supplied by mains supply: the tolerance is ±10% on the assigned voltage and the frequency
tolerance ±1%. Consult us for any other power supply conditions.
• For motors supplied by a drive: the tolerance is ±10% on the assigned voltage at the motor terminals. Refer
to the indications on the drive nameplate(s). The temperature rating was performed with IGBT drive, PWM
waveshape, min quench frequency = 3 kHz, open loop constant U/f. In the case of a drive with voltage drop and
continuous operation (1h min) in the 45-50 Hz frequency range, use T/Tn = 95 %.
• The choice of connecting cables must satisfy the installation rules dictated by the standards applicable to
the point of installation of the equipment, the current, voltage, length, 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 make ensure:
- the conformity of the junction box (Ex, IP, IK etc.).
- the conformity of the connection to the terminal and the tightening torques.
• The screws used to connect the cables must be of the same type as the cable terminals or isolating rods (do
not connect steel screws to brass terminals, for example).
• Earthing of the main and any auxiliary motor is compulsory and must be performed in accordance with current
regulations.
• When the motor is fitted with auxiliary ventilation, this must be of a type certified by the group, the application
(Ex tb) 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 sensors fitted on the motor must be connected to a device (in addition to and functionally
independent of any system which could be required for operational reasons in normal conditions) which switches
off the motor.
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