ABB Relion RES670, Applications Manual

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3.2 Description of configuration RES670
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3.2.1 Introduction
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3.2.1.1 Description of configuration A20
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The configuration of the IED is shown in figure 3 .
RES670 A20 configuration is applicable for a typical single busbar single breaker
arrangement monitoring up to three bays. RES670 A20 is delivered in 1/2, 3/4 and
full (1/1)19" rack casing. For this application 12 analog inputs are used, thus only
one transformer module (TRM) with 12 analog inputs (9I+3U) is available in A20
standard configuration. As shown in
figure 3 , RES670 A20 configuration as a
PMU is measuring one 3-phase voltage of the busbar and three 3-phase currents of
bays 1 to 3. There are two instances of PMU reporting functionality available in
A20 configuration, meaning two independent IEEE C37.118/1344 data streams. In
the standard A20 configuration, each instance of PMU, in addition to frequency-
deviation and rate-of-change-of-frequency data, is reporting 16 synchrophasors
over IEEE C37.118/1344; that is four 3-phase synchrophasors and 12 single phase
synchrophasors in each data stream corresponding to the AC voltage and current
measurements.
In addition, each data stream includes 8 analog and 8 binary reporting channels
over IEEE C37.118/1344 in the standard configuration. The number of analog and
binary 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 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, 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 figure 3 , there are optional functions such as Earth fault protection
(EF4 PTOC), Overcurrent protection (OC4 PTOC), Under/Over power protection
(GUPPDUP, GOPPDOP), etc. which can be added per request. RES670 A20
Section 3
1MRK 511 407-UEN C
Configuration
42 Phasor measurement unit RES670 2.2 IEC
Application manual