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(3) Power supply connection
WARNING
①
Be sure that the power supply conforms to the rated voltage and rated
frequency requirements.
• When using inverter controlled operation, protect the motor by
incorporating the motor burnout prevention terminals "A" and "B"
in the inverter's control circuit.
In addition, if it is inverter operation at different voltage (more
than 380V), you will need a motor insulation strengthening.
• Permissible voltage fluctuation range:
Continuous…Rated voltage within ±5%
Momentary…Rated voltage within ±10%
②
Please connect the
ground wire
sure.
③
CRH Series: The impeller rotates clockwise when viewed from the
motor. Make sure that impeller rotates in the correct
direction before starting operation.
CRD-H Series, CRH-H Series, and CRN Series
: The impeller can rotate either clockwise or
counterclockwise direction.
④
The terminals A and B (with white leads) on the CRD-H, CRH-H,
and CRN Series are for motor burnout prevention. See (4) for
their connection and use.
⑤
When using crimp terminals, either cover the crimp area with an
insulation tube, or use insulated type crimp terminals.
⑥
In electrical installation, use a cable lock or a similar item at the
cable pull-in opening so that pulling force does not apply to the
terminals.
(4) Using the burnout prevention terminals
The CRD-H, CRH-H, and CRN Series Mistresa have a heat-sensitive
thermal protector at the motor winding. This auto reset thermal protector
operates as follows. When the motor winding temperature rises
excessively high, the relay contacts open. When the temperature comes
back down to a certain temperature, the contacts automatically close
again. Connect the thermal protector with the terminals A and B for
burnout prevention.
By connecting this terminal in series with the operating circuit of the
electromagnetic switch (with thermal relay), to prevent motor burnout.
Screw size
M3.5
Tightening torque
0.87N·m (max0.96N·
m)
