siemens
Siemens SIPROTEC 7SJ82 Overcurrent Protection Relay
Model: 7SJ8211-5EB90-2FA0
4-hour response · Pricing in SAR · Delivery across all KSA regions
7SJ8211-5EB90-2FA0 — Siemens SIPROTEC 7SJ82 Overcurrent Protection Relay
The Siemens SIPROTEC 7SJ82 is the most widely deployed numerical overcurrent and earth-fault protection IED in Saudi Arabia's MV distribution substations and industrial switchgear. It provides the core protection functions — overcurrent (50/51), directional overcurrent (67/67N), earth-fault (50N/51N), sensitive earth-fault (50Ns/51Ns), auto-reclosing (79), and circuit breaker failure (50BF) — that protect the majority of MV network components. The 7SJ82 replaces older SIPROTEC 4 relays (7SJ61, 7SJ62, 7SJ63) with a single modern IED supporting IEC 61850 Edition 2 including GOOSE messaging for fast bus protection and integrating directly with Siemens' SICAM substation automation systems.
The four-shot auto-reclosing function restores supply within seconds of transient fault clearing on overhead feeders, with independently configurable dead-times and live-line check settings. The optional arc flash detection module connected to optical sensors trips in under 10 ms — three to five times faster than conventional overcurrent protection — dramatically reducing arc energy and burn injury risk in MV switchgear. Sensitive earth-fault protection at 0.02 × In detects high-resistance earth faults on ungrounded or resistance-grounded MV networks invisible to conventional overcurrent protection.
The 7SJ82 is deployed at SEC secondary distribution substations throughout the Kingdom, at ARAMCO process area MV switchgear in the Eastern Province, at SABIC Jubail ring-main unit protection panels, and at NEOM and Red Sea Project infrastructure distribution switchgear. DIGSI 5 within TIA Portal allows protection engineering alongside S7-1500 PLCs from a single tool.
Razz Middle East supplies and commissions 7SJ82 relays with protection coordination studies, DIGSI 5 engineering, factory acceptance testing, and IEC 61850 GOOSE configuration throughout Saudi Arabia.
Technical Specifications
Full specifications for the 7SJ8211-5EB90-2FA0
- Protection Functions
- 50/51 OC, 67/67N Directional, 50N/51N EF, 50Ns/51Ns SEF, 79 AR (4-shot), 50BF CB Fail
- Current Inputs
- 4 × CT
- Voltage Inputs
- 3 × VT
- Communication
- IEC 61850 Ed2, PROFINET, DNP3
- Arc Flash
- Optional arc sensor module (<10 ms)
- Software
- DIGSI 5
- Mounting
- 19" rack / flush panel
- Standard
- IEC 60255
Key Features & Benefits
- Four-shot auto-reclosing with independently configurable dead-times and live-line check settings restores supply within seconds of transient fault clearing on Saudi overhead distribution feeders.
- Directional overcurrent (67/67N) enables protection of meshed distribution networks and ring-main feeders where fault current can flow from either direction depending on network switching state.
- Optional arc flash detection module with optical sensors trips in under 10 ms — three to five times faster than conventional protection — minimising arc energy release and injury risk in MV switchgear panels.
- IEC 61850 Edition 2 GOOSE messaging enables fast bus protection interlocking between adjacent feeder relays, achieving selective fault clearance in under one cycle without pilot wire cabling.
- DIGSI 5 within TIA Portal allows relay engineering alongside S7-1500 PLCs and SIMATIC HMI panels from a single tool, reducing engineering time on integrated substation automation projects.
- Sensitive earth-fault (50Ns/51Ns) with directional sensitivity as low as 0.02 × In detects high-resistance earth faults on ungrounded or resistance-grounded MV networks invisible to conventional protection.
- Time-stamped event logging of all protection events, measurements, and setting changes provides the audit trail required by Saudi Aramco and SEC maintenance management systems.
Industrial Applications in Saudi Arabia
- SEC secondary MV distribution substation feeder protection throughout the Kingdom, where four-shot auto-reclose maximises supply restoration after transient overhead line faults on 13.8 kV and 33 kV feeders.
- ARAMCO process area MV switchgear protection in the Eastern Province, where directional overcurrent protects ring-main distribution in refinery and gas processing facility MV networks.
- SABIC Jubail petrochemical complex MV ring-main unit protection panels, where GOOSE bus interlocking between adjacent 7SJ82 relays provides fast selective fault isolation.
- Industrial plant MV switchgear protection at large manufacturing facilities in MODON industrial estates, where arc flash detection provides personnel protection in switchgear panels.
- NEOM and Red Sea Project primary distribution substation protection, where IEC 61850 Edition 2 provides interoperability with the project's digital substation platform.
- Renewable energy plant MV collection feeder protection at Saudi solar and wind projects, where directional functions protect bidirectional power flow on collection circuits.
- Underground cable feeder protection in urban MV distribution networks in Riyadh and Jeddah, where sensitive earth-fault detection identifies insulation degradation before complete cable failure.
Industrial Supplier in Saudi Arabia
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Common questions from buyers in Saudi Arabia and the GCC