Suzhou Monarch Control Technology MCTC-CTB-A, User Manual, Page: 19 / 183

NICE3000 User Manual Safety information and attention items
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1.2 Attention Items
1.2.1 Motor insulation check
When the motor is used for the first time, or reused after storing for a long time, or in a regular
checkup, the user must check the insulation of the motor to prevent the poor insulation of the
windings of motor from damaging the controller. The motor connection must be divided from
the controller during the insulation check. It is recommended to use a 500V Mega-Ohm-Meter
to check and the insulation resistance shall not be less than 5M
Ω
.
1.2.2 Thermal Protection of Motor
If the rated capacity of the motor selected is not matching that of the controller, especially
when the rated power of the controller is bigger than that of the motor, make sure to adjust the
parameters for motor protection inside the controller or to install a thermal relay to the motor to
guarantee the protection to the motor.
1.2.3 Motor Heat and Noise
Since the output voltage of the controller is in PWM wave with some harmonic wave, the
temperature may raise, the noise and vibration may increase compared with the controller
running at main frequency.
1.2.4 Pressure-sensitive Device or Capacitor at the Output Side of the Controller
Because the controller outputs PWM wave, the capacitor used for improving power factor and
pressure-sensitive resistor used for lightening-proof shouldn
’
t be installed at the output side of
the controller. Otherwise the controller may have transient over-current and may be damaged.
1.2.5 Switches Used at the Input and Output terminal of the Controller
If the contactor is required to be installed between the controller input terminal and the power
supply, it is prohibited to start or stop the controller with the contactor. If the switches like
contactors are connected between the output terminal and the motor, make sure to start and
stop the controller when the controller has no outputting, otherwise the modules in the controller
may be damaged.
1.2.6 Usage out of the Range of Rated Voltage
The NICE3000 controller shall not be used out of the specified range of operation voltage.
Otherwise the internal components of the controller may be damaged. If needed, please use
corresponding voltage regulation device to change the voltage.
1.2.7 Lightning Stroke Protection
There are lightning protection devices inside the controller, but the user should install other
lightning protection device at the front end of the controller if lightning strike occurs frequently.
1.2.8 Altitude and De-rating
When the altitude is higher than 1000m, the cooling effect of consult is deteriorated because
of the rarefaction of air, then it is a necessity to de-rate the use of controller and please contact
our company for detailed technical support in this circumstance.