Siemens 7SJ82 SIPROTEC 5 Feeder Overcurrent Protection Relay

Feature & Principle

It belongs to Siemens SIPROTEC 5 platform feeder protection relay. It samples three‑phase CT current signals continuously and executes time‑graded overcurrent and sensitive earth fault protection logic. It supports multiple inverse time curves, thermal overload and breaker failure backup function. It has built‑in disturbance recording, event recording and metering. It supports IEC61850, Modbus TCP and DNP3 communication protocols for SCADA interconnection. Configuration and diagnosis are realized with DIGSI 5 software.

Specifications

Model: P1J52398 (7SJ82) Brand: Siemens Series: SIPROTEC 5 CT rated input: 1 / 5 A Auxiliary supply: 100‑125 V Core protection: Phase overcurrent, earth fault, overload, breaker failure Communication: IEC61850, Modbus TCP, DNP3 Configuration software: DIGSI 5 Mounting: Panel flush mounting Application: Medium voltage feeder, industrial substation, auxiliary power system Certification: CE, IEC

Components & Diagnostics

CPU main board, CT analog acquisition module, binary input/output module, power supply unit, local LCD HMI, backplane bus. Common faults: communication offline, sampling signal drift, trip circuit self‑check alarm, HMI display abnormality, firmware failure.

Product Brief

P1J52398 feeder overcurrent protection relay, Siemens SIPROTEC 5 IED spare widely used for substation and industrial power protection cabinet overhaul and replacement.