Siemens SIPROTEC 7SS52 - Page 9

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Siemens AG ⋅ May 1998
4.6.2 Circuit-breaker failure protection for busbar faults 4 - 24....................................
4.6.3 Failure of the bus coupler circuit breaker 4 - 25............................................
4.7 Ancillary Functions 4-26...............................................................
4.7.1 Overcurrent controlled trip command 4 - 26...............................................
4.7.1.1 Feeder-selective trip release 4 - 26......................................................
4.7.2 Minimum duration of the trip command 4 - 26.............................................
4.7.3 Detection of short-circuit in the "dead zone" of the bus coupler 4 - 27.......................
4.7.3.1 Recognition of the closing command in the bus coupler 4 - 28...............................
4.7.3.2 Recognition of status OPEN of the bus coupler circuit breaker 4 - 28.........................
4.7.4 Recognition of a circuit breaker disturbance 4 - 29.........................................
4.7.5 Control functions 4-29................................................................
4.7.5.1 Trip test with circuit breaker 4 - 29.......................................................
4.7.5.2 Bay out of service 4-30................................................................
4.7.6 Event logging 4-31...................................................................
4.7.6.1 Alarm relays and indications 4 - 31.......................................................
4.7.6.2 Operation and indication 4 - 31..........................................................
4.7.7 Fault recording 4-32..................................................................
4.7.8 Monitoring functions 4-32.............................................................
4.7.8.1 Hardware monitoring 4 - 32.............................................................
4.7.8.2 Software monitoring 4-33.............................................................
4.7.8.3 Supervision of the external CT circuits/differential current supervision 4 - 34..................
4.7.8.4 Isolator supervision 4-35..............................................................
4.7.8.5 Supervision of CB failure protection initiation and release 4 - 35.............................
4.7.8.6 Current-controlled reset of the TRIP command 4 - 36......................................
4.7.8.7 Differential current supervision for linearized current transformers 4 - 37.....................
4.7.8.8 Cyclic test 4-37......................................................................
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5.1 Unpacking and repacking 5 - 1.........................................................
5.2 Preparations 5-1....................................................................
5.2.1 Connection of the bay units in the bus coupler bay 5 - 2...................................
5.2.2 Installation and connection 5 - 2........................................................
5.2.2.1 Version for panel surface mounting (FE, ZE) 5 - 2.........................................
5.2.2.2 Bay unit for panel or cubicle flush mounting 5 - 3.........................................
5.2.2.3 Subrack version of the master unit 5 - 3.................................................
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