Chapter 1 Safety Information and Precautions
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1.2 Precautions
1. Motor Insulation Test
Perform an insulation test on the motor under the following conditions:
- Before the motor is used for the rst time
- When the motor is reused after being stored for a long time
- During periodic inspection
This is to prevent the poor insulation of motor windings from damaging the controller.
The motor must be disconnected from the controller during the insulation test. A 500-volt
megameter is recommended for this test, and the insulation resistance must not be less
than 5 MΩ.
2. Motor Heat and Noise
The output of the controller is pulse width modulation (PWM) wave with certain harmonic
wave, and therefore, the motor temperature rise, noise, and vibration are slightly greater
than those at running with the mains frequency.
3. Voltage-sensitive device or capacitor on the output side of the controller
The controller outputs PWM waves, and therefore, do not install the capacitor for improving
power factor or lightning protection voltage-sensitive resistor on the output side of the
controller. Otherwise, the controller may suffer transient overcurrent or even be damaged.
4. Use outside the rated voltage
The controller must not be used outside the allowable voltage range specified in this
manual. Otherwise, components inside the controller may be damaged. If required, use
a corresponding voltage step-up or step-down device to match the power voltage to the
rated voltage range for the controller.
5. 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 to the output side of the controller.
6. 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. Contact Inovance for technical support.
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