I did not find a way to restore the settings, but there is way to block some of the functions when they are tripped. it depends on which function is tripped.
Which one is in your case?
Hello,
I have a problem with the existing settings in one Siemens relay 7SJ80. It is always tripped and it is not possible to change the settings. So, I want to ask you if there is some option to restore the device setting to default with keyboard combination. I know such method for MiCOM...
Hi, if you have a winding short circuit to the earth this means that you have a short curcuit insite of the zone of REF protection. This current in the CT will be opposite according to the "normal" current when the SC is outsite of the TX. It is better to simulate this current (fron neutral CT)...
Hi, it is not necessary to make a model for inverter. According to the manufacturar the maximum short circuit current for inverter is 5 % more than the nominal current. Tiristor system inside of the inverter not allow current more than 5 %.
You have to calculate precisely the cross section of the shield. The distance between the grounding boxes also depends on the cross section of the shield. Of course you have to see the rated voltage and rated current.
