Hitachi Relion 650 Series Technical Manual page 221

1MRK 511 557-UEN Rev. A
• 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. The Disturbance handling tool uses this
information to 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, for example, trig on analog inputs
• Primary and secondary instrument transformer rating
• Over- or Undertrig: level and operation
• Over- or Undertrig status at time of trig
• CT direction
Binary:
• Signal names
• Status of binary input signals
The configuration file is a mandatory file containing information needed to interpret the data file. For
example sampling rate, number of channels, system frequency, channel info etc.
The data file, which also is mandatory, containing values for each input channel for each sample in
the record (scaled value). The data file also contains a sequence number and time stamp for each
set of samples.
Technical Manual
Saving a disturbance record to non-volatile memory may take up to 120 seconds. To
prevent data loss, do not power off the IED within two minutes after the last
recording.
© 2021 Hitachi Energy. All rights reserved.
Section 12
Monitoring
215