Siemens 7SJ82 P1J52398

The 7SJ82 P1J52398 is a SIPROTEC 5 overcurrent protection relay, CT secondary selectable 1A or 5A, auxiliary supply 100–125V AC/DC. This 7SJ82 P1J52398 is designed for feeder, motor and transformer backup protection, equipped with phase overcurrent, earth fault, negative sequence overcurrent, thermal overload and voltage supervision functions. The suffix P1J52398 defines I/O quantity, communication module, housing type, conformal coating and certification for this specific variant.

This 7SJ82 P1J52398 supports three-pole auto-reclosing, synchrocheck, bay control and programmable interlock logic. It includes disturbance recorder, sequence of event logging and fault locator. Hot‑swap communication modules support IEC 61850, IEC 60870-5-103 and Modbus TCP with PRP redundancy. Parameter setting and commissioning are completed via DIGSI 5 software. The front graphical HMI enables local measured value check, setting review and manual bay operation. It also provides flexible protection characteristic curves for different distribution network requirements.

The 7SJ82 P1J52398 is widely used in industrial substations, power plants, water treatment and mining distribution feeders. SIPROTEC 5 7SJ82 is Siemens mainstream overcurrent protection platform. Many electrical maintenance teams stock the 7SJ82 P1J52398 as spare relay for panel retrofit and emergency replacement of feeder protection circuits.