ABB REX 521, Technical Reference Manual, General

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Protection Relay
Technical Reference Manual,
General
REX 521 1MRS 751108-MUM
Issued: 27.6.2001
Version: B/05.07.2002
Checked: ML
Approved: MK
We reserve the right to change data without prior notice.
Contents
1. Safety information .....................................................................5
2. Introduction ...............................................................................6
2.1. General .........................................................................................6
2.2. Application .....................................................................................7
2.3. Hardware versions ........................................................................7
3. Requirements ............................................................................8
4. Technical description ...............................................................9
4.1. Functional description ...................................................................9
4.1.1. Parametrization ..................................................................9
4.1.1.1. Local parametrization ...........................................9
4.1.1.2. External parametrization ......................................9
4.1.1.3. Relay Setting Tool view ......................................10
4.1.2. Non-volatile memory ........................................................10
4.1.3. Real-time clock (RTC) ......................................................11
4.1.4. Auxiliary voltage ...............................................................11
4.1.4.1. Power supply versions .......................................11
4.1.4.2. Low auxiliary voltage indication ..........................12
4.1.5. Overtemperature indication ..............................................12
4.1.6. Analogue channels ..........................................................12
4.1.6.1. Setting the rated values for the protected unit ...12
4.1.6.2. Technical data of the measuring devices ...........13
4.1.7. Digital inputs ....................................................................15
4.1.7.1. Filtering of digital inputs .....................................15
4.1.7.2. Inversion of digital inputs ....................................16
4.1.8. Outputs ............................................................................16
4.1.8.1. High-speed power output (HSPO) .....................16
4.1.8.2. Single-pole power outputs (PO) .........................17
4.1.8.3. Signalling outputs (SO) ......................................18
4.1.9. Testing inputs and outputs ...............................................18
4.1.10.Trip-circuit supervision .....................................................19
4.1.11.Self-supervision ...............................................................20
4.1.11.1.Fault indication ...................................................22
4.1.11.2.Fault indication texts ..........................................22
4.1.12.Serial communication .......................................................23
4.1.12.1.Optical communication port on the rear panel ...23
4.1.12.2.Front panel optical connection for a PC .............24
4.1.12.3.The service pin located on the rear panel ..........24