ABB Relion 670 series Operation Manual page 90

Section 9
Troubleshooting
A
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Figure 62: Testing output contacts using the voltage drop method
1
2 Contact voltage drop
3 Load
4 Supply voltage
• To check the status of the output circuits driving the output relay via the LHMI, select
Main menu/Test/Binary output values and then navigate to the board with the actual
binary output to be checked.
• Test and change the relay state manually.
1.
2.
3.
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.
84
V
1
4
Contact current
To set the IED to test mode, select Main menu/Test/IED test mode/TESTMODE:1
and set the parameter
To operate or force the output relay to operate, select Main menu/Test/Forcing/
Binary output values and then navigate to the board with the actual binary output
relay to be operated/forced.
Select the BOn to be operated/forced and use
actual output relay.
Each BOn is represented by two signals. The first signal in LHMI is the actual value 1
or 0 of the output, and in PCM600 a lit or dimmed diode. The second signal is the
status Normal or Forced. Forced status is only achieved when the BO is set to
or operated on the LHMI.
Set the parameter
Start LED stops flashing when the relay is no longer in test mode.
2
3
TestMode to On .
TestMode to Off after completing these tests. The
1MRK 500 127-UEN D
and or to operate the
Operation manual
Forced
670 series