Siprotec-7SJ82

Key Benefits:

Cost-Effective Protection: Delivers powerful protection functions at a reduced cost, making it ideal for budget-conscious projects.

Compact Design: Space-saving 1/3 × 19″ housing for small switchgear panels.

Cybersecurity Ready: Fully compliant with NERC CIP and BDEW Whitepaper standards, ensuring secure access and operation.

Rugged and Reliable: Conformal coating on all boards provides high reliability even in extreme environmental conditions.

Fully Compatible with IEC 61850 Editions 1, 2.0, and 2.1.

Main Features:

Feeder and Overcurrent Protection for all voltage levels

Flexible I/O Configurations:

Option 1:

• 4 current transformer inputs
• Optional 4 voltage transformer inputs
• 11 or 23 binary inputs
• 9 or 16 binary outputs

Option 2:

• 8 current transformer inputs
• 7 binary inputs
• 7 binary outputs

Display Options: Available with small or large display (no modular expansion support)

Integrated Conformal Coating: Included as standard for enhanced protection

Protection & Automation Functions:

• Overcurrent Protection: Directional and non-directional with optimized tripping times via protection data communication

Ground Fault Detection:

• Supports 3I₀>, V₀>, transient ground faults, cos φ/sin φ, harmonic detection, admittance measurement
• Pulse detection method and intermittent ground fault detection with blocking logic

Capacitor Bank Protection: Overcurrent, overload, current unbalance, peak overvoltage, differential protection

Arc Flash Protection

Voltage Protection: Overvoltage, undervoltage

Power Protection: Configurable for active or reactive power; includes QU (directional reactive undervoltage)

Frequency Protection:

• Frequency deviation and rate-of-change for load shedding
• Automatic frequency relief considering renewable infeed dynamics

Control and Interlocking:

• Synchrocheck, circuit breaker interlocking, CB failure protection, and reignition monitoring

Automation:

• Graphical logic editor for custom logic and automation tasks
• Transformer control for two-winding transformers

Harmonics Analysis:

• Accurate detection of signals up to the 50th harmonic
• Power Quality Basic (PQ Basic): voltage unbalance, dips, interruptions, TDD/THD, harmonics

Communication & Cybersecurity:

• Integrated Ethernet (RJ45) for DIGSI 5 and IEC 61850 (GOOSE & reporting)

Up to 2 Pluggable Communication Modules:

• Supported protocols: IEC 61850-8-1, IEC 60870-5-103/104, Modbus TCP, DNP3 (serial & TCP), PROFINET IO

Reliable Serial Communication:

• Optical fiber, two-wire, and IEEE C37.94 supported
• Automatic switchover between ring and chain topologies

Redundancy Protocols:

• Supports PRP and HSR for maximum communication reliability

Cybersecurity:

• Role-Based Access Control (RBAC)
• Signed firmware
• Event logging of security incidents
• Authenticated access (IEEE 802.1X)

Web-Based Interface:

• Secure browser access to view device diagnostics, vector diagrams, and single-line displays

Advanced Monitoring & PMU Capabilities:

Phasor Measurement Unit (PMU):

• IEEE C37.118 compliant synchrophasor output

Time Synchronization:

Supported via IEEE 1588 (PTP)

Powerful Fault Recording:

• Record buffer up to 80 seconds at 8 kHz or 320 seconds at 2 kHz

Commissioning Tools:

• Integrated auxiliary functions for simplified testing and commissioning

Applications:

• Protection of feeders in radial, looped, or meshed network configurations

• Ground fault protection in isolated or compensated systems

• Backup protection for differential relays used on lines, transformers, motors, generators, and busbars

• Monitoring and protection of simple capacitor banks

• PMU applications in smart grid environments

• Reverse power protection

• Load shedding and automatic system switchover

• Power transformer control (two-winding transformers)

• PQ data acquisition in medium and low voltage networks

The SIPROTEC 7SJ82 combines compact design and cost-efficiency with the full power of the SIPROTEC 5 platform, making it an ideal solution for modern, reliable, and cybersecure overcurrent and feeder protection in distribution and transmission networks.