REYROLLE ARGUS 1 | 7SG1115-2EC32-0CA0 Protection Relay

The Reyrolle Argus 1 (Model 7SG1115) is a high-performance, non-directional overcurrent and earth fault protection relay. Designed for use in medium and high-voltage distribution networks, it provides reliable primary or backup protection for feeders, transformers, and generators. Its compact design and intuitive interface make it a standard choice for utilities and industrial plants requiring robust, time-tested protection logic in a compact, panel-mounted format.

⚙️ Technical Parameters and Specifications

  • Model Number: 7SG1115-2EC32-0CA0

  • Function: Overcurrent and Earth Fault Protection

  • Rated Current (IN): 5A

  • Rated Frequency (FN): 50/60 Hz

  • Auxiliary Supply: 110V DC (Standard for protection control circuits)

  • Dimensions: 174 mm (Height) x 106 mm (Width) x 230 mm (Depth)

  • Weight: Approximately 2.0 kg

  • Country of Origin: United Kingdom

🏭 Application Areas

  • Feeder Protection: Provides inverse definite minimum time (IDMT) and instantaneous protection for radial distribution lines.

  • Industrial Switchgear: Ideal for protecting motors, transformers, and busbars within manufacturing facilities.

  • Retrofit Projects: Frequently used to replace aging electromechanical relays due to its compact physical footprint and reliable digital performance.

  • Substation Automation: Facilitates local fault monitoring and event recording to assist in post-fault analysis and grid maintenance.

  • REYROLLE ARGUS 1 PROTECTION HEALTHY 7SG1115-2EC32-0CA0 IN 5A FN 50/60Hz

📖 Product User Guide

The Reyrolle Argus 1 should be installed in a horizontal or vertical panel cutout. Ensure the current transformer (CT) secondary leads are securely connected to the designated terminals, adhering to proper polarity to prevent incorrect tripping. After hardware installation, use the front-panel menu or the specialized software interface to set your protection parameters, including current pickup thresholds (Is), time-multiplier settings (TMS), and curve characteristics (e.g., IEC Normal Inverse). Always perform a secondary injection test to verify trip times against the relay’s programmed curve before putting the feeder into live operation.

❓ Frequently Asked Questions (Q&A)

What does the “Protection Healthy” status imply? The “Protection Healthy” LED indicates that the internal self-monitoring system has completed its routine checks (RAM, ROM, and hardware integrity) and that the relay is ready to perform its protective functions. If this LED is off, a fault within the relay hardware or a loss of auxiliary supply has occurred.

How does this relay handle 50Hz versus 60Hz systems? The unit is designed for universal frequency operation (50/60 Hz). The relay settings allow you to configure the system frequency in the menu to ensure that sampling and timing calculations are accurate for your specific network.

Is this relay suitable for sensitive earth fault protection? Yes, the 7SG1115 series includes specific settings for earth fault detection. You can program the relay to detect low-level earth fault currents, which is critical for protecting equipment in resistance-grounded distribution systems.

📋 Recommended Similar Models

  1. Reyrolle 7SR11/12 (Modern numerical overcurrent series)

  2. Siemens SIPROTEC Compact 7SJ80 (Advanced overcurrent and protection)

  3. Schneider Easergy P1 (Compact protection relay for distribution)

  4. ABB REF601 (Feeder protection relay)

  5. GE Multilin 750 (Feeder management relay)

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