
Functions
2.17 Auxiliary Functions
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008
224
2.17.2.4 Setting Notes
Reading/Setting/Resetting Counters
The SIPROTEC 4 System Description provides a description of how to read out the statistical counters via the
device front panel or DIGSI. Setting or resetting of these statistical counters takes place under the menu item
MESSAGES
—>
STATISTICS
by overwriting the counter values displayed.
Circuit Breaker Maintenance
Under address
172
52 B.WEAR MONIT
one of the alternatives
Σ
I
x
procedure, 2P procedure,
I
2
t procedure or
Disabled
can be set. All parameters relevant to this function are available at parameter block
P.System
Data 1
(see Section2.1.3).
The following setting values are important input values the subfunctions require in order to operate correctly:
The CB Tripping Time is a characteristic value provided by the manufacturer. It covers the entire tripping
process from the trip command (applying auxiliary power to the trip element of the circuit breaker) up to arc
extinction in all poles. The time is set at address
266
T 52 BREAKTIME
.
The CB Operating Time
T 52 OPENING
is equally a characteristic value of the circuit breaker. It covers the
time span between the trip command (applying auxiliary power to the trip element of the circuit breaker) and
separation of CB contacts in all poles. It is entered at address
267
T 52 OPENING
.
The following diagram illustrates the relationship between these CB times.
Figure 2-76
Illustration of the CB times
Current flow monitoring
212
BkrClosed I MIN
, which some protective functions rely upon to detect a closed
CB, is used as the current zero criterion. It should be set with respect to the actually used device functions (see
also margin heading „Current Flow Monitoring (CB)“ in Section 2.1.3.2.
Содержание SIPROTEC 7SJ61
Страница 368: ...Technical Data 4 22 Dimensions SIPROTEC 7SJ61 Manual C53000 G1140 C210 1 Release date 02 2008 368 ...
Страница 436: ...Appendix A 11 Measured Values SIPROTEC 7SJ61 Manual C53000 G1140 C210 1 Release date 02 2008 436 ...
Страница 438: ...Literature SIPROTEC 7SJ61 Manual C53000 G1140 C210 1 Release date 02 2008 438 ...
Страница 450: ...Glossary SIPROTEC 7SJ61 Manual C53000 G1140 C210 1 Release date 02 2008 450 ...
Страница 454: ...Index SIPROTEC 7SJ61 Manual C53000 G1140 C210 1 Release date 02 2008 454 ...