User Manual
EM100 Mini Inverter
6
1.2 Precautions
Motor Insulation Inspection
When the motor is used for the first time or when the motor is reused after being kept, or
when periodical inspection is performed, insulation inspection shall be conducted with
motor so as to avoid damaging the inverter because of the insulation failure of the motor
windings. The motor wires must be disconnected from the inverter during the insulation
inspection. It is recommended to use the 500V megameter, and the insulating resistance
measured shall be 5M at least.
Motor Thermal Protection
If the motor rating does not match that of the inverter, especially when the rated power
of the inverter is higher than that of the motor, adjust motor protection parameters in the
inverter or install thermal relay to protect motor.
Operating with the Frequency Higher than Grid Power Frequency
Output frequency of EM100 is 0.00Hz ~ 320.00Hz. If EM100 is required to operate
above 50.00Hz, please take the endurance of mechanical devices into consideration.
Mechanical Vibrations
Inverter may encounter mechanical resonance point of the load device at certain output
frequencies which can be avoided by setting the skip frequency parameters of the
inverter.
Motor Heat and Noise
Since output voltage of inverter is PWM wave and contains a certain amount of
harmonics, so that the temperature, noise and vibration of the motor will be higher than
those when the inverter runs at grid power frequency.
Piezosistor or the Capacitor Improving Power Factor on Output Side
The inverter outputs PWM wave, do not install capacitor to improve power factor or
piezosistor for lightning protection on output side. Otherwise, it will trigger inverter
instantaneous overcurrent or even damage inverter.
Applied with the Rated Voltage
Apply EM100 with the rated voltage. Failure to comply will damage inverter. If required,
take a transformer to boost or step-down voltage.
Do Not Apply a 3-Phase Input Inverter to 2-Phase Input Applications
Do not apply a 3-phase input EM100 inverter to 2-phase input applications. Otherwise, it
will result in faults or damage inverter.
Lightning Protection
EM100 has integrated lightning over-current protection device which has certain
self-protection capacity against the lightning. Additional protection devices have to be
installed between inverter and power supply in the area where lightning occurs
frequently.
Altitude Derating
In altitudes above 1000m above sea level, the derating is required because of poor
cooling effect due to rare air. Contact SINEE for technical support.
Cautions for Inverter Disposal
The electrolytic capacitors on the main circuit and PCBA may explode when they are
burnt. Emission of toxic gas may be generated when the plastic parts are burnt. Please
dispose inverter as industrial wastes.
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