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It specifies relay order code NAFAABA3FFxxxAx1xx and maps phase and ground voltage/current signals (VA, VB, VC, VG; IA, IB, IC, IG) plus binary I/O and high-speed outputs. The drawings cover protection/command functions, VT connection settings for Wye and open-delta metering considerations, and power supply and I/O interconnections for inputs, outputs, and external blocking logic.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/ref620-relay-order-code-nafaaba3ffxxxax1xx-electrical-single-line-and-wiring-diagrams/655894/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/ref620-relay-order-code-nafaaba3ffxxxax1xx-electrical-single-line-and-wiring-diagrams/655894.png","ImageObject",300,407,{"name":92,"@type":93},"jay","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-25",true,{"@type":102,"interactionType":103,"userInteractionCount":34},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What application context do the REF620 drawings target?","Question",{"text":112,"@type":113},"The functions shown are for a distribution feeder application, with specific relay and wiring elements documented across multiple schematic sheets.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How are VT connections handled for metering?",{"text":117,"@type":113},"The documentation highlights Wye VT connection settings for correct metering and notes alternate considerations for open-delta connected VT configurations.",{"name":119,"@type":110,"acceptedAnswer":120},"Where are phase voltages, currents, and binary I/O shown?",{"text":121,"@type":113},"Phase voltages and currents are listed on the diagram sections (VA/VB/VC/VG and IA/IB/IC/IG), while binary I/O and high-speed outputs are mapped in the binary I/O sections.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},655894,1793029779,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":34,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":34,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},3985747858866,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","| |  |  |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| General Note:\u003Cbr>Functions shown in this drawing are for a distribution feeder application (87LOZ REF function is not shown) . |  Notes:\u003Cbr>1. Rotary switch emuilates drop down menu for \"Pol Signal Sel\" paameter setting in PCM600 . Switch position shown for default setting (Calclated Vo) .\u003Cbr>2. \"Pol Signal Sel\" parameter setting Calc Vo, and 59N-1 function not applicable for open delta connected VTs. |  |  |  |  |  |  |  |  |\n|  SINGLE LINE DIAGRAM (TYPICAL) |  | AUTOCAD 2014 |  | Copyright 2015 ABBAll rights reserved | | 1MAC505278-DR |  | A |  |\n| RELAY ORDER CODE: NAFAABA3FFxxxAx1xx |  |  |  |  |  |  |  |  |  |\n|  |  | ABB Protective Relays and Switches, Coral Springs Fl, U.S.A. |  |  |  | | SHEET 1 OF 7 |  |  |\n\n\n|  |  |  |  |  |  |  |  | REF620_NAFAABA3FFxxxAx1xx  |  |  |  |  |  |  |  |  | |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  |  |  | |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | \u003Cbr>\u003Cbr>PHASE VOLTAGE  VA\u003Cbr>PHASE VOLTAGE  VB\u003Cbr>PHASE VOLTAGE     VC\u003Cbr>GROUND VOLTAGE     VG\u003Cbr>SYNCH VOLTAGE  VS\u003Cbr>A B C D E F G H I J\u003Cbr>1\u003Cbr>2 3\u003Cbr>4 5\u003Cbr>6 7\u003Cbr>8 9\u003Cbr>10 11\u003Cbr>12 13\u003Cbr>14 15\u003Cbr>16 17\u003Cbr>18 19\u003Cbr>20\u003Cbr>( POTENTIALS) |  |  |  |\n| \u003Cbr>|  |  |  |  |  |  | \u003Cbr>|  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  | 52_EXE_CL/79-1_CLOSE_CB(PO1) |  | 50BF_TR BU(PO2) 86_94-1_TRIP/52_EXE_OP(PO3) 86_94-2_TRIP(PO4)\u003Cbr>86_94-1_TRIP(HSO1)\u003Cbr>AFD-2_TRIP(HSO2)\u003Cbr>AFD-3_TRIP(HSO3)\u003Cbr>CB_ POSITION_CLOSE(IN2) CB_ POSITION_OPEN(IN3) |  |  | EXTERNAL AR BLOCKING(IN4) |  |  |  |  |  |  |\n| PHASE CURRENT | IA\u003Cbr>| PHASE CURRENT | IB\u003Cbr>| PHASE CURRENT\u003Cbr> IC\u003Cbr>GROUND CURRENT | IG\u003Cbr>| RELAY POS . VDC\u003Cbr>RELAY NEG . VDC |  |  |  |  |  |  |  |  |  |  |  |  |\n| A B C D E F G H I J \u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>12 \u003Cbr>34 \u003Cbr>56 \u003Cbr>78 \u003Cbr>910 \u003Cbr>1112 \u003Cbr>1314 \u003Cbr>1516 \u003Cbr>1718 \u003Cbr>1920\u003Cbr>(CURRENTS AND POWER SUPPLY) |  |  |  |  |  |  | A B C D E F G H I J \u003Cbr>12 \u003Cbr>34 \u003Cbr>56 \u003Cbr>78 \u003Cbr>910 \u003Cbr>1112 \u003Cbr>1314 \u003Cbr>1516 \u003Cbr>1718 \u003Cbr>1920\u003Cbr>( BINARY I/O AND HIGH SPEED OUTPUTS) |  |  |  |  |  |  |  |  |  |  |  |\n| General Notes:\u003Cbr>1. Style and code numbers for FT-1 switches provide black covers and handles, screw terminals and standard depth. Poles selection follows arrangement shown in this drawing set. For custom designs, different selection options can be made by using FT-1 configurator at [ft1switch.com](ft1switch.com)\u003Cbr>[2](2). Refer to 620 series ANSI Installation Manual for relay and cutout dimensions ( Document ID: 1MAC457436-iB, Revision: A, Product version 2.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n|   FRONT PANEL ELEVATION  RELAY ORDER CODE: NAFAABA3FFxxxAx1xx |  |  |  |  |  |  |  | AUTOCAD 2014 |  |  | Copyright 2015 ABBAll rights reserved |  | | 1MAC505278-DR |  |  | A |  |\n|  |  |  |  |  |  |  |  | ABB Protective Relays and Switches, Coral Springs Fl, U.S.A. |  |  |  |  |  | |  | SHEET 2 OF 7 |  |  |\n\n\n| REF620_NAFAABA3FFxxxAx1xx\u003Cbr>52\u003Cbr>\u003Cbr>\u003Cbr>Bus\u003Cbr>Broken Delta\u003Cbr>Open\u003Cbr>Delta *\u003Cbr>FT-1/TS3 REF620\u003Cbr>X130\u003Cbr>FT-1/TS1\u003Cbr>X120\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>WYE VT CONNECTION\u003Cbr>'VT connection' setting = 'Wye')\u003Cbr>\u003Cbr>* For relay voltage connections shown set Analog input Voltage 'VT connection' setting to Wye' for metering to work correctly. Refer to application manual for alternate connections to relay for open delta connections using 'Delta' VT connection setting. |  |  |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  |  |  |  |  |  |  |  |  |  |\n|   AC SCHEMATIC ( TYPICAL)  RELAY ORDER CODE: NAFAABA3FFxxxAx1xx | AUTOCAD 2014 |  | Copyright 2015 ABBAll rights reserved | | 1MAC505278-DR |  |  | A |  |\n|  | ABB Protective Relays and Switches, Coral Springs Fl, U.S.A. |  |  |  | | | SHE","cbCaithw6N6qrQ7F","https://ap.wps.com/l/cbCaithw6N6qrQ7F","pdf",802565,"English","# Typical SINGLE LINE DIAGRAM (TYPICAL)\n## Front Panel Elevation\n# AC SCHEMATIC (TYPICAL)\n# DC SCHEMATIC INPUTS (TYPICAL)\n## DC SCHEMATIC: POWER SUPPLY AND OUTPUTS\n# DC SCHEMATIC INPUTS/OUTPUTS (TYPICAL)\n# CONNECTION DIAGRAM-RELAY","[{\"question\":\"What application context do the REF620 drawings target?\",\"answer\":\"The functions shown are for a distribution feeder application, with specific relay and wiring elements documented across multiple schematic sheets.\"},{\"question\":\"How are VT connections handled for metering?\",\"answer\":\"The documentation highlights Wye VT connection settings for correct metering and notes alternate considerations for open-delta connected VT configurations.\"},{\"question\":\"Where are phase voltages, currents, and binary I/O shown?\",\"answer\":\"Phase voltages and currents are listed on the diagram sections (VA/VB/VC/VG and IA/IB/IC/IG), while binary I/O and high-speed outputs are mapped in the binary I/O sections.\"}]","REF620 - Relay Order Code NAFAABA3FFxxxAx1xx - Electrical Single-Line and Wiring Diagrams | PDF",1792964624,18]