PRODUCT DESCRIPTION
SIEMENS 7SJ8031-1EB90-1FB0 L0A - Multifunction Feeder Protection Relay
The SIEMENS 7SJ8031-1EB90-1FB0 L0A is a compact, microprocessor-based digital protection relay from the SIPROTEC 7SJ80 series, engineered for comprehensive feeder and overhead line protection. It integrates overcurrent, earth fault, voltage, and frequency protection functions with advanced control capabilities. This unit is designed for deployment in medium-voltage and high-voltage distribution networks, industrial power systems, and power generation facilities requiring robust and precise fault detection and isolation.
Technical Specifications:
- SERIES/FAMILY: SIPROTEC 7SJ80
- COMPONENT TYPE: Multifunction Feeder Protection Relay
- ELECTRICAL SPECS:
- NOMINAL CURRENT INPUTS: 1A / 5A (switchable)
- AUXILIARY VOLTAGE RANGE: 60-250V DC / 100-230V AC
- NOMINAL FREQUENCY: 50 Hz / 60 Hz
- MECHANICAL/PHYSICAL:
- FORM FACTOR: Compact housing
- MOUNTING STYLE: Flush mounting
- INTERFACE/CONTROL:
- COMMUNICATION PROTOCOLS: IEC 61850, Modbus TCP, DNP3, IEC 60870-5-103, IEC 60870-5-104 (specific configuration determined by '1F' and 'L0A' options)
- BINARY INPUTS: Configurable (typical for B90 variant)
- BINARY OUTPUTS: Configurable (typical for B90 variant)
- FEEDBACK: Event recorder, fault recorder, measured values
- ENVIRONMENTAL/MOUNTING:
- IP RATING (FRONT): IP50
- IP RATING (REAR): IP20
- COOLING METHOD: Passive convection
- COMPATIBILITY/APPLICATION: Protection of overhead lines, cables, transformers, generators, and motors in utility and industrial power systems, distribution substations, and industrial plants.