Bartec Varnost BM 4KTC71, Manual

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INSTALLATION GUIDELINES
31
3. APPLICATION AND EXPLOSION PROTECTION
The explosion-proof asynchronous three-phase squirrel-cage motors of the type 4KT(B)CD are
designed for their application in industrial buildings with highly explosive atmospheres caused by
flammable gases, steam, liquids or dust.
Explosion-proof motor versions are:
”Explosion-proof enclosure” for the motor housing and ”Increased safety” for the terminal box
according to EN 60079-0, EN 60079-1 and 60079-7. The cover of the terminal box carries the Ex
imprint.
”Explosion-proof enclosure” for the motor housing and the terminal box according EN 60079-0 and
EN 60079-1. The cover of the terminal box carries Ex imprint.
”Explosion by enclosure »tb« for the motor housing and the terminal box according to EN 60079-31
for use in the presence of combustible dust.
The standard electric motor is suitable for the T4 temperature class or maximum 135
0
C surface
temparture of equipment.
The exact indication of the explosion protection can be found on nameplate of the motor.
4. INSTALLATION (MOUNTING) OF THE ELECTRIC MOTOR
THE ELECTRIC MOTOR MUST BE MOUNTED BY QUALIFIED PERSONS IN ORDER TO
AVOID POSSIBLE DAMAGES DURING OPERATION CAUSED BY AN INCORRECT
INSTALLATION.
The following rules must be observed during installation:
- strictly adhere to the installation instructions,
- check whether the explosion protection corresponds to the environment or not
(sector, gas group , temperature group),
- check the effects of the environment on the operation of the electric motor (aggressive
environment, temperature, dust ...),
- consider particulars and requirements of room/plant,
- make sure that the correct tools and devices are used,
- observe the motor safety instructions,
- make sure that the means for personal safety are used.
The electric motors are manufactured in such a way as to function in a mildly humid and dusty
atmosphere under temperatures between -50

C to 40

C without requiring additional protection. If
ambient temperature is below -20
0
C then motors must be equiped with space heaters ( Ex d
motors only).
If mounted (installed) outdoors, the motors must be protected from direct sunlight. If the motor is
mounted and operated in vertical position, the fan openings must be protected against the ingress
of water or any other forein objects by fixing the cover above them.
Insulation of the electric motors consists of water-resistant materials and high-quality coating. If
stored correctly, it is therefore not necessary to carry out special tests before connecting the motor
to the power supply.
When mounting the elements (such as clutch, pulley) on to the motor shaft, please pay particular
attention to the bearings. The axial forces caused by possible impacts during installation must not
have any effect on the bearings.