MD280/MD280N User Manual Safety and Precautions
15
If a contactor is installed between the power supply and the input terminal
of the inverter, it is not allowed to use the contactor to control the
startup/stop of the inverter. If use of such contactor is unavoidable, it shall
be used with interval of at least one hour. Frequent charge and discharge
will reduce the service life of the capacitor inside the inverter. If switching
devices like contactor are installed between the output end of the inverter
and the motor, it shall ensure that the on/off operation is conducted when
the inverter has no output. Otherwise the modules in the inverter may be
damaged.
1.2.8 Use under voltage rather than rated voltag
If the MD series inverter is used outside the allowable working voltage
range as specified in this manual, it is easy to damage the devices in the
inverter. When necessary, use the corresponding step-up or step-down
instruments to change the voltage.
1.2.9 Change Three-phase Input to Two-phase Input
It is not allowed to change the MD series three-phase inverter into
two-phase one. Otherwise, it may cause fault or damage to the inverter.
1.2.10 Lightning Impulse Protection
The series inverter has lightning over current protection device, and has
certain self-protection capacity against the lightning. In applications
where lightning occurs frequently, the user shall install additional protection
devices at the front-end of the inverter.
1.2.11 Altitude and Derating
In areas with altitude of more than 1,000 meters, the heat sinking effect of
the inverter may turn poo rer due to rare air. Therefore, it needs to derate
the inverter for use. Please contact our company for technical consulting in
case of such condition.
1.2.12 Certain Special Use
If the user needs to use the inverter with the methods other than the
recommended wiring diagram in this manual, such as shared DC bus,
please consult our company.
1.2.13 Cautions of Inverter Disposal
The electrolytic capacitors on the main circuit and the PCB may explode
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