Isolation measurement without involving the drive

Controls in order

1. Apply the ABB electrical precautions, disconnect all sources and verify the absence of voltage according to the hardware manual.
2. Disconnect the engine cable from the drive output terminals: ABB prohibits proof of rigidity or isolation on the converter.
3. Measure each phase of the motor circuit towards PE following limits and test voltage prescribed by the engine manufacturer or compressor.
4. Record temperature, instrument, applied voltage and result before reconnecting the circuit.

Primary source and documents

Open the official source la

♪ 3AXD50000044839 Rev D · 18/02/2022 · control 2026-10-22

Location: Electrical installation · Measuring the insulation · Printed page 114 (page 118 of PDF)