Goodrive350-19 series VFD Safety precautions
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As the leakage current during VFD running may exceed 3.5mA, apply reliable grounding and
ensure the ground resistance
is less than 10Ω. The PE ground conductor and phase conductor
have equal conductivity capability. For the models of 30kW and higher, the cross sectional area of
the PE ground conductor can be slightly less than the recommended area.
R, S, and T are the power input terminals, while U, V, and W are output terminals for motors.
Connect the input power cables and motor cables properly; otherwise, VFD damage may result.
1.4.2 Commissioning and running
Disconnect all power sources applied to the VFD before terminal wiring, and wait
at least the time designated on the VFD after disconnecting the power sources.
High voltage presents inside the VFD during running. Do not carry out any
operation on the VFD during running except for keypad setup. For 3PH AC 660V
VFD models, the control terminals form extra-low voltage circuits. Therefore, you
need to prevent the control terminals from connecting to accessible terminals of
other devices.
The VFD may start up by itself when P01.21 is set to 1 (restart after power cut).
Do not get close to the VFD and motor.
The VFD cannot be used as "Emergency-stop device".
The VFD cannot act as an emergency brake for the motor; it is a must to install
mechanical brake device.
During
driving
a
permanent-magnet
synchronous
motor,
besides
above-mentioned items, the following work must be done before installation and
maintenance.
a) Disconnect all the input power sources including main power and control
power.
b) Ensure the permanent-magnet synchronous motor has been stopped, and
the voltage on output end of the VFD is lower than 36V.
c) After the permanent-magnet synchronous motor is stopped, wait at least the
time designated on the VFD, and ensure the voltage between "+" and "-" is
lower than 36V.
d) During operation, it is a must to ensure the permanent-magnet synchronous
motor cannot run again by the action of external load; it is recommended to
install effective external brake devices or disconnect the direct electrical
connection between permanent-magnet synchronous motor and the VFD.
Note:
Do not switch on or switch off input power sources of the VFD frequently.
If the VFD has been stored without use for a long time, perform capacitor reforming (described in
Maintenance), inspection and pilot run for the VFD before using the VFD.
Close the front cover before VFD running; otherwise, electric shock may occur.