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

Goodrive880 Series Regenerative Rectifier Unit Hardware Manual

4.1 Safety notes








4.2 Insulation inspection

Regenerative rectifier unit and regenerative rectifier filter unit
Before delivery, each unit has been tested for insulation of the main circuit to the housing. Moreover, there is
voltage limiting circuit inside the rectifier, and the circuit will automatically cut off the test voltage of the
withstand voltage test. Do not carry out insulation withstand test on the rectifier, or measure the control
circuit of the rectifier with a megohmmeter.
Input power cable
Check the insulation conditions of the input power cable of the rectifier according to the local regulations
before connecting it.
Motor and motor cable
Check the motor and motor cable insulation status as follows:
Step 1 Ensure that the motor cable has been connected to the motor.
Step 2 Remove the motor cable from the L1, L2, and L3 output terminals of the rectifier.
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 1M
Ohm.
202401 (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.

Re-power on must not occur.

Wait for at least the time designated on the regenerative rectifier, and ensure

the voltage between (+) and (-) is lower than 36V through measurement.
The equipment is well grounded.

Live parts have been shielded or isolated.

All installation work can be performed only in power-off (no voltage) state since
high voltage is present in the regenerative rectifier 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 regenerative rectifier is supplied externally,
disconnecting the circuit break device cannot disconnect the entire power supply.
The regenerative rectifier 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 unit.
If the safety device on a current branch trips, check the regenerative rectifier for
the fault cause, rectify the fault, and replace the damaged parts.
Electrical installation
34