Bartec Varnost 4KTC 250, Руководство пользователя

Страница: 13 / 45

INSTALLATIONGUIDELINES
FOR 4KTC SQUIRREL- CAGE MOTORS
13
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 60

C without requiring additional protection. If ambient temperature is
below -20
0
C then motors can be equipped 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.
5. CONNECTION TO THE POWER SUPPLY
IMPORTANT!
THE EXPLOSION-PROOF VERSIONS MAY BE MOUNTED AND CONNECTED TO THE POWER
SUPPLY BY QUALIFIED PERSONS ONLY; THE INSTALLER MUST HAVE ADDITIONAL KNOWLEDGE
ABOUT EXPLOSION PROTECTION.
The following items must be checked before the electric motor can be connected to the mains power supply:
- that the data on the label correspond to voltage and frequency of the power supply,
- that the explosion protection indicated corresponds to the environment the electric motor will be operated in
(gas group, temperature class),
- that the installation (pipes or cables) is carried out correctly.
The electric motors rotate clockwise when the phase conductors L1, L2 and L3 are connected to the
terminals U,V,W (1U,1V,1W or U1,V1,W1). Rotation may be changed by switching the terminals on two
phases of conductors.
The following elements are connected to the terminals:
10 – 11
PTC 145°C built in
14 – 15 Thermostats NC (normally closed contact)
16 – 17 Thermostats NO (normally open contact)
The motors are equipped with 3 temperature detectors (PTC thermistor DIN 44081 - ….). These temperature
detectors are to be connected to a tripping unit with one of Ex Notified Bodies mark of conformity. The
tripping unit is not protected against explosions and must therefore be installed outside of the hazardous
area. The mark of conformity serves merely to confirm the adherence to the electrical data at the interface
between the temperature detector circuit and the tripping device and to allow the application of both the
tripping device with mark of conformity and the PTC contacts according to DIN 44081 for the thermal control
of explosion-proof electric machines.