ABB RET650 Series Commissioning Manual page 103

1MRK 504 136-UUS B
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.
Transformer protection RET650
Commissioning manual
signal is the status Normal or Forced. Forced status is only achieved when the BO is set
Forced or operated on the LHMI.
to
Set the parameter
Pickup LED stops flashing when the relay is no longer in test mode.
© Copyright 2013 ABB. All rights reserved
TestMode to disable after completing these tests. The
Section 9
Troubleshooting
97