Functions
6-226 7SA522 Manual
C53000-G1176-C119-2
6.16.2 Applying the Function Parameter Settings
The sensitivity of the measured value monitoring can be changed. In the factory, pre-
settings based on experience have already been applied, which should be sufficient
for most applications. If particularly high operational asymmetries of the currents and/
or voltages are expected, or if one or more monitoring functions pick up sporadically
during normal operation, the sensitivity setting(s) should be reduced.
In address 0($685(683(59 the measured value monitoring can be switched
21 or 2)).
Symmetry
Monitoring
Address %$/$1&(8/,0,7 determines the voltage threshold (phase–phase),
above which the voltage symmetry monitoring is in service (refer to Figure 6-116). Ad-
dress %$/)$&7258 is the corresponding symmetry factor, i.e. the slope of
the symmetry characteristic (Figure 6-116).
Address %$/$1&(,/,0,7 determines the current threshold above which the
current symmetry monitoring is in service (refer also to Figure 6-115). Address
%$/)$&725, is the corresponding symmetry factor, i.e. the slope of the symmetry
characteristic (Figure 6-115).
Summation
Monitoring
Address SI THRESHOLD determines the current threshold above which the cur-
rent summation monitoring (refer to Figure 6-114) picks up (absolute value, only re-
ferred to I
N
). The relative component (referred to the maximum conductor current) for
the pick-up of the current summation monitoring (Figure 6-114) is set in address
SI FACTOR.
Voltage sum internal (measured value
acquisition)
“)DLOΣ83K(” (165) general alarms: 164, 160 as allocated
Voltage symmetry external (primary plant or
voltage transformers)
“)DLO8EDODQFH”
(167)
general alarms: 164, 160 as allocated
Voltage phase rotation Extrem (primary plant or
connection)
“)DLO3K6HT”
(171)
general alarm: 160 as allocated
Voltage failure,
three-phase,
Fuse failure monitor
external (primary plant or
connection)
“)XVH²)DLOXUH” (169,
170)
general alarm: 160
distance protection
blocked
as allocated
Voltage failure,
single-/two-phase,
Fuse failure monitor
external (voltage transform-
ers)
“)XVH²)DLOXUH” (169,
170)
general alarm: 160
distance protection
blocked
as allocated
Trip circuit supervision external (trip circuit or
control voltage failure)
“)$,/7ULSFLU”
(6865)
general alarm: – as allocated
Table 6-6 Summary of the device response to detected failures
Monitoring Possible causes Alarm (function no.) Failure response
General alarms
Output
1
) Following three unsuccessful reboot attempts, the device is taken out of service
2
) D.OK = “Device Okay” = Live contact relay
To Next Page
Loading...
Need help?
General
