Functions
148
7SS52 V4 Manual
C53000-G1176-C182-3
*) The values such as “CLOSED“ and “OPEN“ of the alarm (FNo. 176.1110/CU) are
variable.
Depending on the isolator, the alarm is generated via FNo. 176.1110/CU,
176.1115/CU, 176.1120/CU, 176.1125/CU or 176.1130/CU.
Isolators malfunctions (plausibility or runtime errors) and failure of the auxiliary voltage
supply for the isolator checkback signals are not annunciated until the set isolator run-
ning time ISOL TIME (6301/CU) has elapsed.
Due to an isolator fault indicated with "Bay DC fail G" (FNo. 10426/CU), "Isol
flt run G" (FNo. 10427/CU) or "Isol flt pos G" (FNo. 10428/CU) the
indication "Isol flt alarm" (FNo. 10425/CU) is issued. This one is replaced
by the indication "IsoProhib/fault" (FNo. 10470/CU) when the isolator fault is
acknowledged.
While a bay is in maintenance, there is no monitoring of the isolator status checkback
signals, nor a plausibility check.
Reset of
isolator alarms
Depending on the setting of the parameter ISOL Malfunct (6302/CU), several
types of behaviour of the blocking are possible, see Figure 5-34, page 149.
The function is reset with the control "Reset IsoMalBl" or by the binary input
">Reset IsoMalBl" (BI FNo. 7/CU) in the central unit.
0 0 Isolator malfunction:
− runtime
− wire break
− no auxiliary voltage
new isolator status
CLOSED
new isolator status accord-
ing to setting 6303/CU
(see “Auxiliary voltage
supply failure” , page 147)
Alarm "$01 $02"
(FNo.176.1110/CU),
"FltR $01$02"
(FNo.176.1112/CU),
"Isol flt run G"
(FNo.10427/CU),
"Isol flt alarm"
(FNo. 176.10425/CU),
"BayDCfail $00"
(FNo.176.1134/CU),
"Bay DC fail G"
(FNo.10426/CU),
"Isol flt alarm"
(FNo.10425/CU)
Isolator status indication Meaning Reaction Alarm
CLOSED OPEN
www . ElectricalPartManuals . com
To Next Page
Loading...
Need help?
General
