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ABB REX 521 Operating Manual

Relay retrofit program, cutting tool
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Download this manual See also: Operator's Manual
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O P E R AT I N G G U I D E
Relay Retrofit Program for REX 521
Cutting Tool Operating Guide

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Summary of Contents for ABB REX 521

  • Page 1 — O P E R AT I N G G U I D E Relay Retrofit Program for REX 521 Cutting Tool Operating Guide...
  • Page 2 Trademarks ABB and Relion are registered trademarks of the ABB Group. All other brand or product names mentioned in this document may be trademarks or registered trademarks of their respective holders.

  • Page 3: Document Revision History

    Relay Retrofit Program for REX 521 Cutting Tool Safety Guide 1MRS758975 See the REX 521 and 615 series documentation for detailed technical information on the relays. Product series- and product-specific manuals can be downloaded from the ABB Website http://www.abb.com/mediumvoltage. 1.3 Symbols The warning icon indicates the presence of a hazard which could result in personal injury.

  • Page 4: Panel Cut-Out Dimensions

    2. Panel cut-out dimensions Figure 1: REX521RRP with REF615 replacement relay There are two options to widen the existing cut-out: To the left or to the right depending of the switchgear lay-out (free space on it). Figure 2: Left cutting Figure 3: Right cutting A.
  • Page 5 3. Cutting order Figure 4 illustrates the cutting order on the front side of the switchgear door when the cutout is widened to the right. The left side cutting is symmetrical but to the left. Ensure the needed free space before starting the cutting procedure. If offcut gatherer is not used, protect the personnel and the switchgear panel from flying offcuts.
  • Page 6 4. Cutting tool overview Figure 7: Cutting tool kit components 1. Cutting head 2. Offcut gatherer (part of the cutting head) 3. Vent lever 4. Operating switch 5. Power unit 6. Battery 7. Battery charger A file (Figure 8) is needed for finishing the work before before installing REX521RRP. Note! The file is not included in the cutting tool kit.
  • Page 7 5. Assembling the cutting tool Figure 9: Assembling the cutting head 1. Power unit 2. Feed rod transmitting power to the punching head 3. Punch 4. Cutting head ID. When assembled correctly, the same text should appear in both the die and punch. 5.
  • Page 8 2. Install the punch (3) to the feed rod (2). Notice the position of the REX 521 marking on the punch. The punch assembled to its place. 3. Install the two coil springs (5) to their slots in the punch (3).
  • Page 9 5. Add the nut (7) to the feed rod (2). 6. Turn the nut so that the hole in the nut and the groove in the feed rod are aligned. Add the lock pin (8) to the hole in the nut. 7.
  • Page 10 9. Check and correct the gatherer alignment with the cutting head. Ready installed cutting head with the gatherer. After assembling the cutting head, insert the bat- tery to the power unit. The battery can be inserted from either side. C u t t i n g To o l O p e r at i n g G u i d e...
  • Page 11 6. Preparations See the Safety Guide before using the cutting tool. The cutting can be performed from the front or the back of the panel door. It is recommended to make the cut-out from the front side of the door panel to avoid sharp edges and ensuring smooth installation of the new replacement relay.
  • Page 12 4. Release the protective ground wire. 5. After the wires have been released, the whole de- vice can be released. Remove the four fixing bracket screws. 6. Release the four fixing brackets. C u t t i n g To o l O p e r at i n g G u i d e...
  • Page 13 2. Check that the cutting head is correctly installed. The marking REX 521 should be on the same side on the punch and the die. C u t t i n g To o l O p e r at i n g G u i d e...
  • Page 14 3. Start the cutting procedure by pushing the guiding faces of the cutting head to the cut-out edges: to the top edge and to the right edge side if the right edge widening/cutting is valid. For your safety, keep your hands on the power unit, never on the cutting head.
  • Page 15 The fourth cut. 7. For the fifth cut, push the cutting head, which is guiding the faces, firmly against the bottom side edge. C u t t i n g To o l O p e r at i n g G u i d e...
  • Page 16 8. Finalizing the cutout 1. After each relay cut-out (ten separate cuttings), empty the offcut gatherer. For safety reasons remove the battery first. Ensure that no offcuts remain inside the switchgear if the offcut gatherer was not used. 2. Use a file to remove any sharp edges or burrs around the cut-out area.

  • Page 17: Finishing The Work

    9. Finishing the work 1. It is advisable to coat bare surfaces, for example with cold galvanized compounds, in case of corrosive atmosphere. Install the new replacement relay. 2. Push the new replacement relay firmly against the panel cut-out. 3. Add the four fixing brackets. 4.
  • Page 18 5. Start the wiring work by connecting the safety ground wire. 6. Connect the signal wire connectors. Fix female side wire connectors with their fixing screws to the male side connectors. Use a type PH 0 or PZ 0 (ISO 8764/2) screwdriver.
  • Page 19 C u t t i n g To o l O p e r at i n g G u i d e...
  • Page 20 With regard to purchase orders, the agreed par- ticulars shall prevail. ABB OY does not ac- cept any responsibility whatsoever for po- tential errors or possible lack of information in this document.