Siemens – 7SD8031-5EB07-1FA1
 LINE-DIFFERENTIAL PROT. RELAY HOUSING 1/6 19″, 4 X I, 5 BI, 8 BO, (2 CHANGEOVER/FORM C) 1 LIVE STATUS CONTACT PROTECTION DATA INTERFACE 2 WIRES COPPER, TWISTED MEASURING INPUTS: IPH = 1A / 5A, IE = 1A / 5A RATED AUXILIARY VOLTAGE DC 60V/ 110V / 125V/ 220V/ 250V AC 115V/ 230V FLUSH-MOUNTING CASE, SCREW-TYPE TERMINAL REGION WORLD, IEC/ANSI, LANGUAGE ENGLISH (LANGUAGE CHANGEABLE) STANDARD FRONT NO SYSTEM PORT INTERFACE, PORT A (ON BOTTOM OF DEVICE, REAR) REDUNDANT PROTECTION DATA INTERFACE FO FOR MONO- (24 KM) AND MULTIMODE CABLE (4 KM), LC-DUPLEX CONNECTOR METERING: FAULT RECORDING FUNCTIONALITY: LINE DIFF. PROT. (87L/87NL) INRUSH-CURRENT DETECTION TIME-OVERCURRENT PROTECT. PHASE (50 TD/51),  I>, I>>,I>>>, IP TIME-OVERCURRENT GROUND (50N TD/51N) IN>.IN>>,IN>>>,INP THERMAL OVERLOAD PROTECT. (49) TRIP CIRCUIT SUPERVISION (74TC) CIRCUIT BREAK. FAIL.PROT.(50BF) LOCK OUT (86) INTER TRIP FUNCTION (85 DT) EXTERNAL TRIP INITIATION PARAMETER CHANGEOVER SUPERVISION FUNCTION CIRCUIT BREAKER TEST CONTROL OF CIRCUIT BREAKER FLEXIBLE PROTECTION FUNCTION: UNDER-/OVERVOLTAGE PROT.(27/59) UNDER-/OVERFREQ. PROT. (81U/O) ADDITIONAL FUNCTION: TRANSMISSION OF 16 BINARY SIGNALS VIA THE PROTECTION DATA INTERFACE