3.1.6 Description of 3 ph package A31AThree-phase version of the IED with two low-impedance differential protection zones andeight three-phase CT inputs A31A. The version is intended for applications on smallerbusbars, with up to two zones and eight CT inputs.REB670 ANSI(A20A-X00) / REB670 ANSI(A31A-X00)AC LOGICAC LOGICBUT PTRC87B 3Id/I BZNT PDIF87B 3Id/IBUT PTRC87B 3Id/IOptional FunctionsOC4 PTOC51_67 4(3I>)CC RBRF50BF 3I>BFSMB RREC79 5(0→1)ZA ZBHW LOGIC189 189 189 189REB670 ANSI(A20A-X00) / REB670 ANSI(A31A-X00)BUT PTRC87B 3Id/IBUT PTRC87B 3Id/I BZNT PDIF87B 3Id/IOther Functions in LibraryBDC GAPC87B152BKR152BKR152BKR152BKR152BKR189 189BZIT GGIO87B 3Id/IBCZT PDIF87B 3Id/IC MMXUMET IDRP RDREDFR/SER DRBZIT GGIO87B 3Id/IBCZT PDIF87B 3Id/IC MMXUMET IDRP RDREDFR/SER DRVERSION OF REB670 NUMBER OF FEDERS INBOTH BUSBAR SECTIONSREB670 ANSI(A20A – X00) 3-Phase, 4 Bays, 2 Zones forSimple Station Layout 12 AI 6*REB670 ANSI(A31A – X00) 3-Phase, 8 Bays, 2 Zones forSimple Station Layout 24 AI 14** With Just one CT in the Bus Section BayNUMBER OF REB670REQUIRED BY THE SCHEME22GUID-5084E3E1-F0EE-457E-96AC-AB8AA3994ADA V1 ENFigure 4: Configuration diagram for A31A, configuration X00Section 3 1MRK 505 337-UUS -Configuration48Application manual
