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Since our motors are custom made, speed and torque curve are also specific for each motor type
and they should be requested form the manufacturer.
The manufacturer cannot be held responsible for damage due to incorrect installation or use.
Free circulation of fresh air for cooling the motor must be guaranteed
The maximum ambient temperature must not exceed the given value that is indicated on the
nameplate and in the motor certificate.
To guarantee the explosion proof protection, certified explosion proof cable glands with sealing
joints adapted to the cable diameters, must be used in compliance with IEC/EN 60079-0 and
IEC/EN 60079-1.
If cable glands are provided with the motor, the cable diameter range as indicated in the attached
document, has to be respected. The supplied cable glands are suitable for non-shielded cables
only. The cable must be chosen to withstand the maximum cable temperature, as indicated on
the nameplate.
THE MOTOR WILL LOSE ITS EXPLOSION PROOF CHARACTERISTICS IF THE CABLE
AND GLANDS ARE NOT FITTED CORRECTLY!
Note: If a spare opening for a cable gland isn't used, only the use of cable glands or blanking
elements rated Ex db IIB Tx Gb - where Tx is the temperature class of the motor, as given on the
name plate - suitable for use in an ambient of -40ׄ ° C ≤ T
with IEC/EN 60079-0 and IEC/EN 60079-1, retains the explosion proof characteristics.
Particular attention is to be given to the fixing torque of bolts and screws. The motor fixing bolts
are factory mounted with the correct torque and should not be touched.
It may be necessary to open the terminal box for connecting the motor. When re-mounting the
cover, only use the original screws. The fastening torque for the bolts is given in the table below:
Bolt thread size
Torque (Nm)
Firstly tighten all bolts by hand before applying the full torque. If 4 bolts are present, firstly
tighten two diametrically opposed bolts and then the other two.
Motors without a terminal box as all motors in range BA(X)2xx and some motors in range
BA(X, V)3xx may not be opened. If opened motors will lose their explosion proof
characteristics.
When the threaded blind holes provided on the motor flange are used, only appropriate bolts
or screws should be used. The size of the thread engagement, diameter and maximum length,
is provided on the customer specific drawing. Under no circumstances should a longer thread
engagement be used.
Using a pulley or a coupling device:
Apply only well-balanced discs and couplings. Check the alignment after assembling
Take care while mounting of the pulley on the shaft: Hammering on the shaft will damage the
motor bearings. Pulleys should only be mounted with appropriate mounting tools that do not stress
the motor bearings.
Following these recommendations will greatly increase the expected motor bearing life.
Safety regulations in respect of guarding couplings and belts from being accidentally touched
must be applied.
Ce document doit être transmis et utilisé inchangé et dans son intégralité. L'utilisateur est responsable de vérifier soigneusement
la validité de ce document concernant son produit.
page 68 de 80
ELNOR MOTORS NV
M5
4 - 5
Table 4. Fastening torque for bolts
Instruction Manual Induction Motors 2021-05-11revision 21
≤ +70°C, minimum , in compliance
amb
M6
M8
7 – 9
12 - 14
6 / 10
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