Siemens 7SR51 - Page 70

Parameter: 50BF-n Ext Trip
•
Default Setting: <None>
Used to trigger the circuit‑breaker fail function. The measured current must be above the 50BF setting for
the function to operate, (see 6 Supervision Functions , section 50BF Circuit-Breaker Failure Protection – 3
Pole).
Parameter: CB-n Open
•
Default Setting: <None>
This input is used to monitor the CB status. It is operated when the associated CB is open e.g. it is
connected to a CB auxiliary switch that is closed when the CB is open, (see 7 Control Functions, section
52 Circuit-Breaker Control).
Parameter: CB-n Closed
•
Default Setting: <None>
This input is used to monitor the CB status. It is operated when the associated CB is closed e.g. it is
connected to a CB auxiliary switch that is closed when the CB is closed, (see 7 Control Functions, section
52 Circuit-Breaker Control).
Parameter: Open CB-n
•
Default Setting: <None>
Operation of the binary input is used to initiate a CB open command, (see 7 Control Functions, section 52
Circuit-Breaker Control).
Parameter: Close CB
•
Default Setting:
Operation of the binary input is used to initiate a CB close command, (see 7 Control Functions, section 52
Circuit-Breaker Control).
Parameter: Inhibit CB-n Open
•
Default Setting: <None>
This setting is used to block the opening of a CB e.g. due to low stored energy, (see 7 Control Functions,
section 52 Circuit-Breaker Control).
Parameter: 74TCS-n
•
Default Setting: <None>
This setting is used when the binary input is connected in the CB trip circuit monitoring scheme wiring,
(see 6 Supervision Functions , section 74TC Trip-Circuit Supervision).
Parameter: 79 Trip & Reclose
•
Default Setting: <None>
See 7 Control Functions, section 79 Automatic Reclosing.
Parameter: 79 Trip & Lockout
•
Default Setting: <None>
See 7 Control Functions, section 79 Automatic Reclosing.
Device Functionality
3.4 Binary Inputs
70 Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
C53000-G7040-C014-1, Edition 11.2019