Hitachi Relion 670 Series Product Manual page 10

Phasor measurement unit RES670
Version 2.2
reporting channels can be extended to maximum 24
channels per PMU instance (on each data stream) on
request. This can be done when ordering the RES670 B20
configuration. In the standard B20 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
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functions in standard B20 configuration are Over Voltage,
Under Voltage, Over Frequency, Under Frequency and Rate
of Change of Frequency.
Measuring functions for S, P, Q, I, U, 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
Earth fault protection (EF4PTOC), Overcurrent protection
(OC4PTOC), Under/Over power protection (GUPPDUP,
GOPPDOP), etc. which can be added per request. RES670
B20 function library also includes additional functions which
are available but not configured. Note that RES670 B20
must be reconfigured if any additional functions are used.
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1MRK 511 410-BEN P
figure 3, there are optional functions such as
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