C6.2.27/0716-0219/E
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5.6
Motor protection
Conventional inherent internal line break motor protection is provided for all the compressor
models covered in these guidelines.
5.7
High-potential testing
WARNING
Conductor cables! Electrical shock!
Shut off power supply before high-
potential testing.
CAUTION
Internal arcing! Motor destruction!
Do not carry out high-voltage or
insulation tests if the compressor housing is under vacuum.
Emerson subjects all Scroll compressors to a high-voltage test after final assembly. Each motor
phase winding is tested, according to EN 0530 or VDE 0530 part 1, at a differential voltage of
1000V plus twice the nominal voltage. Since high-voltage tests lead to premature ageing of the
winding insulation further additional tests of that nature are not recommended.
If it has to be done for any reason, a lower voltage must be used. Disconnect all electronic devices,
eg, motor protection module, fan speed control, etc prior to testing.
