7SJ8041-5EB90-1FB0 L0S SIEMENS

The 7SJ8041-5EB90-1FB0 L0S is a versatile overcurrent protection relay designed for comprehensive power system monitoring and control. Housed in a compact 1/6 19" enclosure, it features 4 current inputs (I) and 3 voltage inputs (U), along with 7 binary inputs (BI) and 8 binary outputs (BO), including 2 changeover contacts and a live status contact. The relay supports both 1A and 5A rated current transformer inputs for IPH and IE, and accommodates a wide range of auxiliary voltages, including DC 60V/110V/125V/220V and AC 115V/230V. Designed for flush-mounting with screw-type terminals, this relay is suitable for global applications adhering to IEC/ANSI standards, with English as the default language (changeable). It offers standard front system port and a rear IEC 61850 port with 100Mbit Ethernet and integrated switch, utilizing optical double LC-connectors. This advanced relay provides metering and fault recording capabilities, along with comprehensive protection functions such as time overcurrent protection (TOC) for phase (50/51) and ground (50N/51N), overload protection (49), trip circuit supervision (74TC), and circuit breaker failure protection. Additional functionalities include negative sequence protection, undercurrent monitoring (37), lock-out (86), directional ground fault, voltage and frequency protection, and flexible protection functions for current and voltage parameters; however, it does not include auto-reclosure or fault locator features.