Siemens 7SJ6225-5EB32 Protection Relay

Feature & Principle

It is Siemens SIPROTEC 4 series digital multifunctional feeder protection relay. It adopts high-performance microprocessor sampling voltage and current signals, supports phase overcurrent, sensitive earth fault, directional overcurrent, breaker failure, overload, undervoltage and overvoltage protection. Built-in CFC programmable logic, electrical energy measurement, event logging and fault waveform capture function. It supports IEC60870-5-103, Modbus, optional IEC61850 Ethernet communication to connect SCADA system. Parameter configuration and fault analysis are completed via DIGSI software. This model is discontinued and used for substation medium voltage feeder, motor and backup transformer protection maintenance replacement.

Specifications

Model: 7SJ6225-5EB32 Brand: Siemens Series: SIPROTEC 4 Core functions: Overcurrent, earth fault, directional protection, measurement, fault recording, CFC logic I/O: 11 binary inputs, 6 relay outputs Display: Backlit LCD 4×20 character Communication: IEC60870-5-103, Modbus, IEC61850 optional Power supply: 24~250V AC/DC Installation: Panel flush mount Application: Medium voltage feeder, motor and transformer backup protection cabinet Certification: CE, IEC standard

Components & Diagnostics

Signal sampling unit, main CPU, LCD display panel, communication circuit, status LED, relay output contacts. Common faults: communication offline, measurement drift, false tripping, parameter loss, power supply failure.

Product Brief

7SJ6225-5EB32 protection relay, Siemens SIPROTEC4 feeder overcurrent protection spare widely used for substation medium voltage cabinet overhaul and replacement.