Live Device Chassis - IMO HD2 IP Series Instruction Manual

HD2 IP55 High-ingress Protection Series
2. Solution to RCD maloperation (handling the inverter)
(1) Try to remove the jumper cap at "EMC/J10" on the middle casing of the inverter.
(2) Try to reduce the carrier frequency to 1.5 kHz (P00.14=1.5).
(3) Try to modify the modulation mode to "3PH modulation and 2PH modulation" (P8.40=0).
3. Solution to RCD maloperation (handling the system power distribution)
(1) Check and ensure that the power cable is not soaking in water.
(2) Check and ensure that the cables are not damaged or spliced.
(3) Check and ensure that no secondary grounding is performed on the neutral wire.
(4) Check and ensure that the main power cable terminal is in good contact with the air switch
or contactor (all screws are tightened).
(5) Check 1PH powered devices and ensure that no earth lines are used as neutral wires by
these devices.
(6) Do not use shielded cables as inverter power cables and motor cables.

7.7.5 Live device chassis

Phenomenon
After an inverter is started, there is sensible voltage on the chassis, and you may feel an electric
shock when touching the chassis. The chassis, however, is not live (or the voltage is far lower
than the human safety voltage) when the inverter is powered on but not running.
Solution
1. If there is power distribution grounding or ground stud on the site, ground the cabinet chassis
of the drive system through the power ground or stud.
2. If there is no grounding on the site, you need to connect the motor chassis to the ground
terminal PE of the inverter and ensure that the jumper at "EMC/J10" on the middle casing of
the inverter is shorted.
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Troubleshooting