Electrical Installation; Safety Notes; Insulation Inspection - INVT Goodrive880 Series Hardware Manual

Goodrive880 Series Inverter Unit Hardware Manual

4.1 Safety notes

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4.2 Insulation inspection

Inverter unit
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Before delivery, each inverter unit has been tested for insulation of the main circuit to the housing. Moreover,
there is voltage limiting circuit inside the unit, and the circuit will automatically cut off the test voltage of the
withstand voltage test. Do not carry out insulation withstand test on the unit, or measure the control circuit
of the unit with a megohmmeter.
Input power cable
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Check the insulation conditions of the input power cable of the inverter unit according to the local
regulations before connecting it.
Motor and motor cable
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Insulation inspection procedure is as follows:
Step 1 Ensure that the motor cable has been connected to the motor.
Step 2 Remove the motor cable from the U, V, and W output terminals of the inverter unit.
Step 3 Measure the insulation resistance between the motor cable and each phase of the motor and the
protective ground with a 1kV DC megohmmeter. Insulation resistance must be greater than 1MΩ.
202311 (V1.0)

4 Electrical installation

All safety precautions in this manual must be read and followed. Only trained and
qualified professionals are allowed to carry out the operations mentioned in this
chapter.
All work on electrical equipment must comply with the following:
The power is off.
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Re-power on must not occur.
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Wait for at least the time designated on the inverter unit, and ensure the
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voltage between (+) and (-) is lower than 36V through measurement.
The equipment is well grounded.
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Live parts have been shielded or isolated.
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All installation work can be performed only in power-off (no voltage) state since
high voltage is present in the inverter unit internal during the running.
Do not perform wiring, inspection or component replacement when power supply
is applied. Before wiring or inspection, ensure all the input power supplies have
been disconnected, and wait for at least 15 minutes or until the DC bus voltage is
lower than 36V.
If the auxiliary control power of the inverter unit is supplied externally, the
disconnecting the circuit break device cannot disconnect the entire power supply.
The inverter unit control system may be live even if not started. Please refer to the
electrical schematic diagram for inspection to avoid personal injury caused by
contacting the live part of the inverter unit.
If the safety device on a current branch trips, check the inverter unit for the fault
cause, rectify the fault, and replace the damaged parts.
Electrical installation
59