Section 8
Secondary system supervision
8.1
Current circuit supervision CCSSPVC
IP14555-1 v5
8.1.1
Identification
M14870-1 v5
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current circuit supervision
CCSSPVC
-
87
8.1.2
Functionality
M12444-3 v10
Open or short circuited current transformer cores can cause unwanted operation of
many protection functions such as differential, earth-fault current and negative-
sequence current functions.
Current circuit supervision (CCSSPVC) 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.
8.1.3
Function block
M12436-3 v9
CCSSPVC
I3P*
IREF*
BLOCK
FAIL
ALARM
IEC13000304-1-en.vsd
IEC13000304 V1 EN-US
Figure 89:
CCSSPVC function block
Signal ISIREF must be connected in the configuration.
1MRK 505 384-UEN A
Section 8
Secondary system supervision
Breaker protection REQ650 2.2 IEC
203
Technical manual
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