Hitachi Relion 670 Series Applications Manual page 42

Section 3
Configuration
maximum 24 channels per PMU instance (on each data stream) on request. This can be done when
ordering the RES670 A20 configuration. In the standard A20 configuration, the analog reporting channels
are used for reporting P and Q measurements from each bay over IEEE C37.118/1344.
In addition to the binary reporting channels, there are 4 trigger bits (FREQTRIG, DFDTTRIG, OCTRIG
and UVTRIG) available per PMU instance, which are used to report the existing protection function
triggers over IEEE C37.118/1344.
The main functionality of the RES670 is synchrophasor reporting or PMU functionality. In addition, this
configuration also includes general back-up protection functions which are mainly intended for alarm
purposes. Available protection functions in standard A20 configuration are Overvoltage, Undervoltage,
Overfrequency, Underfrequency and Rate-of-change frequency.
Measuring functions for S, P, Q, I, V, PF, f are available for local presentation on the local HMI and
remote presentation via IEEE C37.118/1344 and/or via IEC 61850. The calibration parameters on the
measurement function allows calibration at site to very high accuracy.
As shown in
Overcurrent protection (OC4PTOC), Under/Over power protection (GUPPDUP, GOPPDOP), etc. which
can be added per request. RES670 A20 function library also includes additional functions, which are
available but not configured. Note that RES670 A20 must be reconfigured if any additional functions are
used.
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figure 3, there are optional functions such as ground fault protection (EF4PTOC),
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1MRK511407-UUS Rev. N
Phasor measurement unit RES670
Application manual