2.1 General
37
7SA522 Manual
C53000-G1176-C155-3
2.1.2 Device
The device requires some general information. This may be, for example, the type of
annunciation to be issued in the event a power system fault occurs.
2.1.2.1 Trip Dependent Messages
The indication of messages masked to local LEDs, and the maintenance of spontane-
ous messages, can be made dependent on whether the device has issued a trip
signal. This information is not output if one or more protection functions have picked
up due to a fault, but the 7SA522 has not initiated the tripping because the fault was
cleared by another device (e.g. on another line). These messages are then limited to
faults on the protected line.
The following figure illustrates the creation of the reset command for stored messages.
When the relay drops off, stationary conditions (fault display Target on PU / Target on
TRIP; Trip / No Trip) decide whether the new fault will be stored or reset.
Figure 2-1 Creation of the reset command for the latched LED and LCD messages
2.1.2.2 Spontaneous Annunciations on the Display
You can determine whether or not the most important data of a fault event are dis-
played automatically after the fault has occurred (see also Subsection “Fault Events”
in Section 2.21.1 “Additional functions”).
138 Fault Locator Enabled
Disabled
Enabled Fault Locator
139 BREAKER FAILURE Disabled
Enabled
Disabled Breaker Failure Protection
140 Trip Cir. Sup. Disabled
1 trip circuit
2 trip circuits
3 trip circuits
Disabled Trip Circuit Supervision
145 P. INTERFACE 1 Enabled
Disabled
Enabled Protection Interface 1 (Port D)
146 P. INTERFACE 2 Disabled
Enabled
Disabled Protection Interface 2 (Port E)
147 NUMBER OF RELAY 2 relays
3 relays
2 relays Number of relays
Addr. Parameter Setting Options Default Setting Comments
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