Circuit Breaker Operation Time Learning Cblearn; Identification; Functionality - Hitachi Relion 650 Series Technical Manual

Section 12
Monitoring
Output
OUTBL
OUTBLPOS
OUTPOS
INVLINT is high if INPREAL is greater or lower than the integer value, which is handled by the
function. Under such condition, OUTRLINT retains the maximum (4294967295) or the minimum
(-4294967295) integer.
BASIN must be connected to BASOUT for proper operation of the function.
12.22

Circuit breaker operation time learning CBLEARN

12.22.1

Identification

Table 293: Identification
Function description
Circuit breaker contact operation time
learning
12.22.2

Functionality

This function provides semi-automatic learning of the mechanical closing and opening times of a
circuit breaker's primary contacts and, optionally, auxiliary contacts. In addition, logical wiring errors
are detected and reported during the learning process. This function learns the timing information of
three phases of a circuit breaker independently, each of which may have its individual drive. When a
switching command is received, it generates a request to SSCPOW function for sending the
commands to the circuit breaker poles, and acquires the changeover times of the connected contacts
accurately through precision binary inputs. The user has an option to accept or reject the results of
each operation. Accepted results are averaged and made available for use in the controlled switching
application.
For performing controlled switching and monitoring, the knowledge of the mechanical operating
times, that is time from command until main contact touch/separation, of the circuit breaker is of
prime importance. This information is required for determining the CB release instant in each phase
from the target switching instant. While monitoring live switching operations, the timing information of
auxiliary contacts (NO/52a and NC/52b) is used for estimation of primary contact timing. This
function has the option to provide the other functions with either the default setting values or the
learnt values (if learning has been performed at least once) at its output interfaces.
330
Derived from input
INPBIN
INPPOS
IEC 61850
identification
CBLEARN
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GDE symbols supported
None
Breaker Indication only,
Breaker2 Indication only
Isolator Indication only,
Isolator2 Indication only
IEC 60617 ANSI/IEEE C37.2
identification device number
— —
1MRK 511 557-UEN Rev. A
Application
None
Shows the breaker or
isolator position in LHMI
when only NO/52a
feedback is available.
To use NC/52b for this
purpose, invert it using the
INVERTER function and
connect to this input.
Shows the breaker or
isolator position in LHMI if
the position information is
directly available from
other functions.
GUID-8232E0F9-9DF5-484C-9F1D-2CEE43AFCF9F v2
GUID-164A8C2D-3C88-4969-9A08-DEF8FFF6AC10 v1
GUID-51251660-53CD-4FC6-97C2-BF907017265D v3
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