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that all terminals on motor terminal plate are hard tightened and insulated for the appropriate
voltage. Max. Moments for tighten are: M4 – 2Nm, M5 – 2,6Nm, M6 – 5Nm, M8 –9Nm, M10 –
15Nm, M12 –24Nm, M16 – 34Nm and terminals 0,45 Nm
that energy supply cable (and eventually cable(s) for auxiliary devices supply) is adequately
sealed by the means of the motor terminal box cable glands
that adequate protection against short-circuit and overload (fuses, bimetal relays, thermal
protection or the like) is assured
that motor connecting to the power supply is performed with the cable of adequate dimensions
and heat resistance (for AT series motors there are special requests stated for cables defined in
“Manufacturer’s declaration”)
The anti-condensation heaters must be fed from a separate lead from the motor power supply
one. Check that the power voltage matches the one indicated on the nameplate. The heaters
must not operate when the motor is under power.
Instructions for additions (eg. Encoder) that are not the product of KONCAR MES can be found on
the manufacturer's web site
On three-phase power supply with voltages 400V the motors with nameplate data D/Y 400/690V can
be connected in winding connection delta (D) acc. to connection diagram labeled inside the terminal
box.
On the same power supply network, motors with nameplate data D/Y 230/400V in connection star (Y)
can also be connected. Motors with those data can be connected also on three-phase network
voltage 230V but they must be in winding connection delta (D). Generally, the motors are connected
to the power supply network via three-pole switch, thee-pole motor protection circuit breaker or
contactor.
In case of starting via the star-delta (Y/D) switch, the winding connection of motor for rated voltage
must be delta (D). In this case the starting current amounts 1/3 of such current in direct connection as
does the starting torque, and this must be considered, i.e. in such way only motors with no load can
be started. Two-speed motors with series-parallel winding (tap wound –speed ratio 1:2) are started by
means of special switch. Net connecting of two and multi-speed motors is performed in accordance
with the connection diagram labeled inside of motor terminal box with adequate protection against the
short circuit and overload.
Generally, the three-phase motors manufactured by
KON
Č
AR-MES d.d.
are designed acc. to
requests of standard IEC 60038 and can work without problems under rated power and torque load
with network voltage aberration of ±10%, until the single-phase
KON
Č
AR-MES d.d
motors can work
under such conditions with network voltage/frequency aberration of ±5%
/
±1%. If the voltage
aberration is greater, the motor cannot be loaded with rated torque but with the torque which must be
corrected in proportion to voltage drop.
Drives where the motor is supplied over static frequency converter (speed regulator), the
recommendations from the standard IEC 60034-25 are applied, so considering these, special
attention must be given when choosing the rotational speed regulator. For motor supply it is desirable
to use the frequency converter (rotational speed regulator) equipped with output dU/dt filter in order to
achieve higher motor winding longevity. For such supply it is useful to contact the motor manufacturer
regarding the motor characteristics and regulation range.
If motor has built-in anti-condensation heaters, they are to be connected acc. to the attached
connection instructions and energized during the motor is at standstill.
Auxiliary devices
For mountings like encoders, brakes and others please observe the corresponding operating and
maintenance instructions of the manufacturer. As option the motors can be equipped with auxiliary
devices.
Motors with Thermal Winding Protection
For monitoring the stator winding temperature it is possible to have thermo couples installed in the
motor (PTC thermistors, KTY or PT100). For their connection suitable auxiliary clamps for auxiliary
circuits are available in the main terminal box or in additional terminal boxes. The connection is done
according to the attached connection diagram. A continuity test of the thermistor sensor circuit using
a test lamp, a hand generator and such like is strictly prohibited because this would destroy the
sensors immediately. If it becomes necessary to verify the cold resistance of the sensor circuit (at
approx. 20
O
C) then the measuring voltage must never exceed 2.5 V DC. It is recommended to carry
out the measurement using a Wheatsone bridge with a 4.5 V DC supply voltage. The cold resistance
