1 Safety Instructions NICE3000
new
User Manual
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9. Changing three-phase input to two-phase input
The three-phase input is required for the 400-V class controller during normal use. The two-phase
380 V or 220 V input is allowed ONLY during emergency evacuation.
The 200-V class controller can be used properly in either three-phase input or two-phase input.
However, the rated output power of the controller differs from the input voltage; this affects selection
of the adaptable motor, and pays special attention.
10. Surge suppressor
The controller has a built-in varistor for suppressing the surge voltage generated when the inductive
loads (electromagnetic contactor, electromagnetic relay, solenoid valve, electromagnetic coil and
electromagnetic brake) around the controller are switched on or off. If the inductive loads generate
very high surge voltage, use a surge suppressor for the inductive load or use a surge suppressor
together with a diode.
Do not connect the surge suppressor at the output side of the controller.
11. Altitude and de-rating
In places where the altitude is above 1000 m and the cooling effect reduces due to thin air, it is
necessary to de-rate the controller (see section 10.2 for details. Contact us for technical support).
12. Disposal
The electrolytic capacitors on the main circuits and PCB may explode when they are burnt.
Poisonous gas is generated when the plastic parts are burnt. Treat them as ordinary industrial waste.
13. Adaptable motor
The standard adaptable motor is an adaptable four-pole squirrel cage asynchronous induction motor.
For other types of motor, select the correct controller according to the rated motor current.
The cooling fan and rotor shaft of non-variable-frequency motors are coaxial, which results in
reduced cooling effect when the motor speed reduces. If variable speed is required, add a more
powerful fan or îš¿t a variable-frequency motor in applications where the motor overheats easily.
The standard parameters of the adaptable motor have already been conîš¿gured inside the controller.
However, it is still necessary to perform motor auto-tuning or to modify the default values based
on actual conditions. Otherwise, the running result and protection performance will be adversely
affected.
The controller might cause an alarm or might be damaged when a short circuit exists on cables or
inside the motor. Therefore, perform insulation short circuit test when the motor and cables are newly
installed or during routine maintenance. During the test, disconnect the controller from the tested
parts.
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