Settings; Information List; Malfunction Responses Of The Monitoring Functions; Description - Siemens SIPROTEC 4 7SJ61 Manual

Supervision with One Binary Input
Note: When using only one binary input (BI) for the trip circuit monitor, malfunctions, such as interruption of
the trip circuit or loss of battery voltage are detected in general, but trip circuit failures while a trip command
is active cannot be detected. Therefore, the measurement must take place over a period of time that bridges
the longest possible duration of a closed trip contact. This is ensured by the fixed number of measurement
repetitions and the time between the state checks.
When using only one binary input, a resistor R is inserted into the circuit on the system side, instead of the
missing second binary input. Through appropriate sizing of the resistor and depending on the system condi-
tions, a lower control voltage is mostly sufficient.
Information for dimensioning resistor R is given in the Chapter "Installation and Commissioning" under Config-
uration Notes in the Section "Trip Circuit Supervision".
2.8.2.3

Settings

Addr. Parameter
8201 FCT 74TC
8202 Alarm Delay
2.8.2.4

Information List

No. Information
6851 >BLOCK 74TC
6852 >74TC trip rel.
6853 >74TC brk rel.
6861 74TC OFF
6862 74TC BLOCKED
6863 74TC ACTIVE
6864 74TC ProgFail
6865 74TC Trip cir.
2.8.3

Malfunction Responses of the Monitoring Functions

In the following malfunction responses of monitoring equipment are clearly listed.
2.8.3.1

Description

Malfunction Responses
Depending on the type of malfunction discovered, an annunciation is sent, a restart of the processor system is
initiated, or the device is taken out of service. After three unsuccessful restart attempts, the device is taken out
of service. The operational readiness NC contact operates to indicate the device is malfunctioning. Also, the
red LED "ERROR" lights up on the front cover, if the internal auxiliary voltage is present, and the green "RUN"
LED goes out. If the internal auxiliary voltage fails, all LEDs are dark.
monitoring functions and the malfunction responses of the relay.
SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016
Setting Options
ON
OFF
1 .. 30 sec
Type of Comments
Informa-
tion
SP >BLOCK 74TC
SP >74TC Trip circuit superv.: trip relay
SP >74TC Trip circuit superv.: brk relay
OUT 74TC Trip circuit supervision OFF
OUT 74TC Trip circuit supervision is BLOCKED
OUT 74TC Trip circuit supervision is ACTIVE
OUT 74TC blocked. Bin. input is not set
OUT 74TC Failure Trip Circuit
Default Setting Comments
ON 74TC TRIP Circuit Supervision
2 sec Delay Time for alarm
Table 2-6 provides a summary of the
Functions
2.8 Monitoring Functions
129