Inovance MD380 Series, User Manual

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MD380 User Manual Safety Information and Precautions
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11) Surge suppressor
The AC drive has a built-in voltage dependent resistor (VDR) for suppressing the surge
voltage generated when the inductive loads (electromagnetic contactor, electromagnetic
relay, solenoid valve, electromagnetic coil and electromagnetic brake) around the AC
drive are switched on or off. If the inductive loads generate a very high surge voltage,
use a surge suppressor for the inductive load or or use a surge suppressor together
with a diode.
Note
Do not connect the surge suppressor on the output side of the AC.
12) Altitude and de-rating
In places where the altitude is above 1000 m, the cooling effect reduces due to thin air,
and it is necessary to de-rate the AC drive. Contact the agent or Inovance for technical
support.
13) Special usage
If wiring that is not described in this manual, such as common DC bus is applied,
contact the agent or Inovance for technical support.
14) 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.
15) Adaptable Motor
‡
The standard adaptable motor is four-pole squirrel-cage asynchronous induction
motor. For other types of motors, select a proper AC drive according to the rated
motor current.
‡
The cooling fan and rotor shaft of a non-variable-frequency motor are coaxial, and
the cooling effect of the fan degrades when the motor speed reduces. Therefore,
add a more powerful fan or replace the motor with a variable-frequency motor in
scenarios where the motor overheats easily.
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AC drive. It is still necessary to perform motor auto-tuning or modify the default
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performance will be affected.
‡
The AC drive may alarm or even be damaged when short-circuit exists on cables
or inside the motor. Therefore, perform the insulation short-circuit test when the
motor and cables are newly installed or during routine maintenance. During the
test, make sure that the AC drive is completely disconnected from the tested parts.
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