Safety Information and Precautions MD380 User Manual
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Use Stage
Safety
Grade
Precautions
During
operation
• Do not touch the fan or the discharging resistor to check the
temperature. Failure to comply will result in personal burnt.
• Signal detection must be performed only by qualied personnel
during operation. Failure to comply will result in personal injury
or damage to the AC drive.
• Avoid objects falling into the AC drive when it is running. Failure
to comply will result in damage to the AC drive.
• Do not start/stop the AC drive by turning the contactor ON/OFF.
Failure to comply will result in damage to the AC drive.
During
maintenance
• Repair or maintenance of the AC drive may be performed only
by qualied personnel. Failure to comply will result in personal
injury or damage to the AC drive.
• Do not repair or maintain the AC drive at power-on. Failure to
comply will result in electric shock.
• Repair or maintain the AC drive only ten minutes after the AC
drive is powered off. This allows for the residual voltage in the
capacitor to discharge to a safe value. Failure to comply will
result in personal injury.
• Ensure that the AC drive is disconnected from all power supplies
before starting repair or maintenance on the AC drive.
• Set and check the parameters again after the AC drive is
replaced.
• All the pluggable components must be plugged or removed only
after power-off.
• The rotating motor generally feeds back power to the AC drive.
As a result, the AC drive is still charged even if the motor
stops, and the power supply is cut off. Thus ensure that the AC
drive is disconnected from the motor before starting repair or
maintenance on the AC drive.
1.2 General Precautions
1) Requirement on residual current device (RCD)
The AC drive generates high leakage current during running, which ows through the
protective earthing (PE) conductor. Thus install a type-B RCD at primary side of the
power supply. When selecting the RCD, you should consider the transient and steady-
state leakage current to ground that may be generated at startup and during running of
the AC drive. You can select a specialized RCD with the function of suppressing high
harmonics or a general-purpose RCD with relatively large residual current.
2) High leakage current warning
The AC drive generates high leakage current during running, which ows
through the PE conductor. Earth connection must be done before connection of power
supply. Earthing shall comply with local regulations and related IEC standards.
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