ABB Relion RES670 Product Manual page 45

Phasor measurement unit RES670 2.1 IEC
Wide area measurement system
RES670 is compliant with the synchrophasor
measurement requirements of IEEE C37.118.1-2011,
including the amendment (IEEE C37.118.1a-2014) for
both P and M performance classes. RES670 is also
compliant with synchrophasor data transfer
requirements of IEEE C37.118.2-2011. There are two
types of internal current transformer cores in RES670,
protection and measuring cores. Using the measuring
cores, RES670 is compliant with all the synchrophasor
measurement requirements. If using the protection
core, for the "signal magnitude-current" steady state
test (mentioned in Table 3 of IEEE C37.118.1-2011
ABB
GUID-F0BAEBD8-E361-4D50-9737-7DF8B043D66A v3
standard), the compliancy to the standard is limited to
the current range between 50% and 200% of rated
current for both P and M classes of the standard. The
reason is that protection cores are not designed for
accurate measurements on low current levels.
The compliancy to IEEE C37.118.1-2011 standard
(including IEEE C37.118.1a-2014) is limited to the
reporting rates up to 60 frames per second which is
required by the standard. This means 10, 25, and 50
frames per second for 50 Hz system frequency and 10,
12, 15, 20, 30, and 60 frames per second for 60 Hz
system frequency.
1MRK 511 367-BEN D
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