ABB REQ650 - Correction Procedures; Changing and Setting the Password; Identifying IED Application Problems; Inspecting the Wiring

8.3 Correction procedures
8.3.1 Changing and setting the password
The password can only be set with PCM600.
For more information, see PCM600 documentation.
8.3.2 Identifying IED application problems
Navigate to the appropriate menu in the LHMI to identify possible problems.
• Check that the function is on.
• Check that the correct setting group (1 to 4) is activated.
• Check the blocking.
• Check the mode.
• Check the measurement value.
• Check the connection to trip and DFR functions.
• Check the channel settings.
8.3.2.1 Inspecting the wiring
The physical inspection of wiring connections often reveals the wrong connection for
phase currents or voltages. However, even though the phase current or voltage
connections to IED terminals might be correct, wrong polarity of one or more
measurement transformers can cause problems.
• Check the current or voltage measurements and their phase information from Main
menu/Measurements/Analog primary values or Analog secondary values.
• Check that the phase information and phase shift between phases is correct.
• Correct the wiring if needed.
• Change the parameter Negation in Configuration/Analog modules/
3PhaseAnalogGroup/SMAI_20_n:1 (n= the number of the SMAI used).
Changing the Negation parameter is not recommended without
special skills.
• In PCM600, change the parameter CTStarPointn (n= the number on the current
input) under the parameter settings for each current input.
1MRK 505 293-UUS A Section 8
Troubleshooting
129
Commissioning manual