A-20 MIB High Impedance Bus Differntial Relay GEK-106426B
A.6 OSCILLOGRAPHY APPENDIX A
A
The second block of information contains the oscillo report; this includes the RMS values of analog signals when the
oscillography was triggered. If the trigger is produced by a relay trip, these values will be the fault values.
This block will be written as follows:
The third and last block, that contains the rest of information for creating COMTRADE format files, has the following
structure:
Once the oscillography information has been read and saved, we will close this screen in the relay. For this purpose, we
send the oscillography file closing command. The information will continue to be stored in the relay, as the closing of this
window does not involve a deletion of the information. However, only one oscillography window will be stored, and when
a new one is created, the previous one will be deleted.
Reply from the relay:
VALUES AT THE MOMENT OF THE OSCILLOGRAPHY TRIGGER
MIB RELAY
MEMORY
POSITION
BIT DESCRIPTION LENGTH (BYTES) FORMAT
Idiff_a when the oscillography was triggered 4 F2
Idiff_b when the oscillography was triggered 4 F2
Idiff_c when the oscillography was triggered 4 F2
OSCILLOGRAPHY GENERAL DATA
MEMORY POSITON BIT DESCRIPTION LENGTH FORMAT
16F6 Date and time 6 F1
16FC Number of samples per second 2 F5
16FE Number of samples 2 F5
1700 Line frequency 2 F5
1702 Oscillo index 2 F5
ADDRESS FUNCTION START #REGS #BYTES COMMAND PASSWORD CRC
01 10 00 00 00 03 06 12 00 01 00 00 00 E4 0E
ADDRESS FUNCTION START #REGS CRC
01 10 00 00 00 03 80 08
To Next Page
Loading...
