Voltage Protection and Control Relay, Standard Configuration: The "A" character in the code indicates the Configuration A, optimized for voltage and frequency-based protection in distribution networks., Main functions: It includes under/overvoltage protection, frequency protection, synchronism control (synchrocheck) and load shedding. Analog Inputs: Configuration A (referred to as "EA" in the sixth/seventh digit of the order code) typically includes 5 voltage inputs (VT)., Binary Inputs/Exits: It has 12 binary inputs (BI) and Signal Inputs/Outputs for switch control and alarm signaling., Power supply: The "AD" code usually identifies the extended auxiliary power range: 48-250 V DC or 100-240 V AC. Communication Protocols: Natively supports the standard IEC 61850 (Editions 1 and 2), including analog and binary GOOSE messaging. It can simultaneously handle protocols such as Modbus and DNP3., Local Interface (HMI): Equipped with a Large graphic display (LCD) that allows the display of customizable single-line diagrams (SLDs) and position indications of disconnectors/switches., Ports: Includes a front-facing Ethernet port (RJ-45) for PC configuration