ABB Relion 650 Series Commissioning Manual page 71

1MRK 505 264-UEN A
An initially high contact resistance does not cause problems as it is reduced quickly by the
electrical cleaning effect of fritting and thermal destruction of layers, bringing the contact
resistance back to the mOhm range. As a result, practically the full voltage is available at the
load.
Busbar protection REB650
Commissioning manual
TestMode to Off after completing these tests. The
Set the parameter
Start LED stops flashing when the relay is no longer in test mode.
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Section 9
Troubleshooting
65