ABB REX 521 Technical Reference Manual, Standard Configurations page 5

1MRS 751802-MUM Protection Relay
Technical Reference Manual, Standard Configurations
7.1.10.SYNC1 .............................................................................89
7.2. Control .........................................................................................90
7.2.1. I<->O CB1 ........................................................................90
7.2.2. I<->O IND1 and I<->O IND2 ............................................91
7.2.3. I<->O POS .......................................................................91
7.3. Measurement ..............................................................................91
7.3.1. 3I ......................................................................................91
7.3.2. Io ......................................................................................92
7.3.3. Uo ....................................................................................92
7.3.4. DREC ...............................................................................93
7.3.5. 3U ....................................................................................95
7.3.6. f ........................................................................................95
7.3.7. PQE .................................................................................95
7.4. Condition monitoring ...................................................................96
7.4.1. CB wear ...........................................................................96
7.4.2. TCS1 ................................................................................96
7.4.3. MCS 3I .............................................................................97
7.4.4. MCS 3U ...........................................................................97
7.5. Power quality ...............................................................................98
7.5.1. PQ 3Inf .............................................................................98
7.5.2. PQ 3Unf ...........................................................................99
7.6. Standard functions ....................................................................100
7.6.1. Switchgroups .................................................................100
7.6.2. Selectors ........................................................................100
8. Example substations ............................................................101
9. Application examples, Basic ................................................104
9.1. Outgoing feeder, Basic B01 ......................................................104
9.1.1. Features .........................................................................104
9.1.2. Measurement connections .............................................106
9.1.3. Protection .......................................................................106
9.1.3.1. Phase overcurrent protection ...........................106
9.1.3.2. Earth-fault protection ........................................107
9.1.3.3. Phase discontinuity protection .........................108
9.1.3.4. Thermal overload protection ............................108
9.1.4. Connections and signal routings ....................................109
9.1.4.1. Protection signal routing ...................................109
9.1.4.2. Indication and control connections ...................111
9.1.5. Implementations .............................................................113
9.1.5.1. Outgoing blocking signal to the incoming
9.1.5.2. Blocking signal received from the residual
feeder ...............................................................113
voltage relay .....................................................114
REX 521
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