ABB Relion RES670, Technical Manual

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Section 13 Secondary system supervision
13.1 Current circuit supervision (87)
IP14555-1 v5
13.1.1 Identification
M14870-1 v5
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current circuit supervision CCSSPVC - 87
13.1.2 Functionality
M12444-3 v10
Open or short circuited current transformer cores can cause unwanted operation of
many protection functions such as differential, ground-fault current and negative-
sequence current functions.
Current circuit supervision (CCSSPVC, 87) compares the residual current from a three
phase set of current transformer cores with the neutral point current on a separate input
taken from another set of cores on the current transformer.
A detection of a difference indicates a fault in the circuit and is used as alarm or to
block protection functions expected to give inadvertent tripping.
13.1.3 Function block
M12436-3 v9
CCSSPVC (87)
I3P*
IREF*
BLOCK FAIL
ALARM
ANSI13000304-1-en.vsd
ANSI13000304 V1 EN-US
Figure 126: CCSSPVC (87) function block
Signal ISIREF must be connected in the configuration.
1MRK 511 408-UUS A
Section 13
Secondary system supervision
Phasor measurement unit RES670 2.2 ANSI 363
Technical manual