ABB Relion 670 Series RES670, Technical Manual

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Section 13 Secondary system supervision
13.1 Current circuit supervision (87)
13.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current circuit supervision CCSSPVC - 87
13.1.2 Functionality
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
CCSSPVC (87)
I3P*
IREF*
BLOCK FAIL
ALARM
ANSI13000304-1-en.vsd
ANSI13000304 V1 EN
Figure 123: CCSSPVC (87) function block
Signal IREF must be connected in the configuration.
1MRK 511 365-UUS A
Section 13
Secondary system supervision
Phasor measurement unit RES670 2.1 ANSI 359
Technical manual