ABB Relion 670 Series Technical Reference Manual page 985

1MRK505222-UUS C
15.12.2.1
Technical reference manual
Memory and storage
The maximum number of recordings depend on each recordings total
recording time. Long recording time will reduce the number of
recordings to less than 100.
The IED flash disk should NOT be used to store any user files. This
might cause disturbance recordings to be deleted due to lack of disk space.
When a recording is completed, a post recording processing occurs.
This post-recording processing comprises:
• Saving the data for analog channels with corresponding data for binary signals
• Add relevant data to be used by the Disturbance handling tool (part of PCM 600)
• Compression of the data, which is performed without losing any data accuracy
• Storing the compressed data in a non-volatile memory (flash memory)
The recorded disturbance is now ready for retrieval and evaluation.
The recording files comply with the Comtrade standard IEC 60255-24 and are divided
into three files; a header file (HDR), a configuration file (CFG) and a data file (DAT).
The header file (optional in the standard) contains basic information about the
disturbance, that is, information from the Disturbance report sub-functions(ER, TVR
and FL). The Disturbance handling tool use this information and present the recording
in a user-friendly way.
General:
• Station name, object name and unit name
• Date and time for the trig of the disturbance
• Record number
• Sampling rate
• Time synchronization source
• Recording times
• Activated trig signal
• Active setting group
Analog:
• Signal names for selected analog channels
• Information e.g. trig on analog inputs
• Primary and secondary instrument transformer rating
Section 15
Monitoring
979