ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS751802-MUM
REX 521
5
Protection Relay
Technical Reference Manual, Standard Configurations
5.2.1. Interlocking options ..........................................................75
6. Default settings .......................................................................79
7. Function block descriptions ..................................................87
7.1. Protection ....................................................................................87
7.1.1. 3I>, 3I>> and 3I>>> .........................................................87
7.1.2. Io>, Io>> and Io>>> .........................................................89
7.1.3. Io>->, Io>>-> and Io>>>-> ................................................90
7.1.4. 3I>-> and 3I>>-> ..............................................................93
7.1.5. 3U> and 3U>> ..................................................................94
7.1.6. 3U< and 3U<< ..................................................................96
7.1.7. 3I2f> .................................................................................97
7.1.8. Iub> ..................................................................................98
7.1.9. 3Ith> .................................................................................98
7.1.10.O->I ..................................................................................99
7.1.11.Uo>, Uo>> and Uo>>> ...................................................101
7.1.12.f1 and f2 .........................................................................102
7.1.13.SYNC1 ...........................................................................103
7.1.14.Is2t n< ............................................................................104
7.1.15.3I() ..................................................................................105
7.1.16.I2> and I2>> ...................................................................106
7.1.17.3I< ..................................................................................107
7.1.18.FUSEF ...........................................................................108
7.1.19.3Ithdev> .........................................................................109
7.1.20.U1<U1U2> .....................................................................110
7.2. Control .......................................................................................111
7.2.1. I<->O CB1 ......................................................................111
7.2.2. I<->O IND1 and I<->O IND2 ..........................................112
7.2.3. I<->O POS .....................................................................112
7.2.4. I<->O IND3 .....................................................................112
7.2.5. ALARM1-8 .....................................................................112
7.3. Measurement ............................................................................115
7.3.1. 3I ....................................................................................115
7.3.2. Io ....................................................................................116
7.3.3. Uo ..................................................................................116
7.3.4. DREC .............................................................................116
7.3.5. 3U ..................................................................................119
7.3.6. 3U_B ..............................................................................120
7.3.7. f ......................................................................................121
7.3.8. PQE ...............................................................................121
7.3.9. AI1 ..................................................................................122
7.4. Condition monitoring .................................................................122
7.4.1. CB wear .........................................................................122

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English