Bartec Varnost BM 4KTC71 Manual Download

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INSTALLATION GUIDELINES

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.

The space heaters are mounted to the terminals    30 – 31 (230V) or 32-33 (110V). Motors  with
space  heaters  are  marked  with  an  additional  label  indicating  the  nominal  data  of  the  heating
system.
The electric control unit must make sure that the nominal motor voltage and the heater voltage are
not present simultaneously.
Take particular care over the connection of the cable cores to the terminal board. The insulation of
the cable cores should be close to the terminal, all wires of the flexible cores must be clamped to
the terminal.

The tightening torque of the connections on the terminal board must not exceed 7,5 Nm.
Pay close attention to the installation instructions when carrying out the explosion protection of the
Ex  d  terminal  box  (»explosion-proof  enclosure«)  and  check  for  the  correct  explosion  protection
cable entry (Ex d entry).

Prior to the mains connection, check the terminal box for the following items:
- there must not be any dust, pieces of wire or other foreign matters inside of the terminal box,
-  the  electrical  connections  must  be  carried  out  by  qualified  persons  and  the  screws  must  be
tightened correspondingly,
- that the mutual air distance is at least 10 mm for voltages of 400 V or 630 V
- that the unused wires are separated and fixed accordingly,
-  all  joint  areas  are  formly  greased  with  grease  type  FOR  PD-2  (Setral  MI  PD  LL/2A)  ali  Renolit
RHF-1 Fuchs

that the cable is sealed correctly at the cable entry.

the unused openings must be sealed so as to

guarantee that the flame-proof properties are

maintained. The means foreseen to achieve this goal must be such so as to ensure that the