ABB Industrial IT enabled REX 521 - Page 3

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Issued: 27.6.2001
Version: D/24.11.2003
We reserve the right to change data without prior notice.
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Technical Reference Manual, General
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2.1. General .........................................................................................7
2.2. Application .....................................................................................8
2.3. Hardware versions ........................................................................8
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4.1. Functional description .................................................................10
4.1.1. Parametrization ................................................................10
4.1.1.1. Local parametrization .........................................10
4.1.1.2. External parametrization ....................................10
4.1.1.3. Relay Setting Tool view ......................................11
4.1.1.4. Graphical I/O Setting Tool ..................................12
4.1.1.5. Factory settings ..................................................12
4.1.2. Non-volatile memory ........................................................13
4.1.3. Real-time clock ................................................................13
4.1.4. Auxiliary voltage ...............................................................14
4.1.4.1. Power supply versions .......................................14
4.1.4.2. Low auxiliary voltage indication ..........................14
4.1.5. Overtemperature indication ..............................................15
4.1.6. Analogue channels ..........................................................15
4.1.6.1. Scaling the rated values of the protected unit for
analogue channels 15
4.1.6.2. Technical data of the measuring devices ...........16
4.1.7. Digital inputs ....................................................................18
4.1.7.1. Filtering of digital inputs .....................................18
4.1.7.2. Inversion of digital inputs ....................................19
4.1.8. Outputs ............................................................................19
4.1.8.1. High-speed power output (HSPO) .....................19
4.1.8.2. Single-pole power outputs (PO) .........................20
4.1.8.3. Signalling outputs (SO) ......................................20
4.1.9. Testing inputs and outputs ...............................................21
4.1.10.Trip-circuit supervision .....................................................21
4.1.11.Self-supervision ...............................................................23
4.1.11.1.Fault indication ...................................................24
4.1.11.2.Fault indication texts ..........................................25
4.1.12.Serial communication .......................................................26
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