ABB 1SVR730884R3300 Three-Phase Monitoring Relay

• 1. Product Overview

  The ABB 1SVR730884R3300 Three-Phase Monitoring Relay is a high-precision relay designed to monitor and protect voltage, current, and phase sequence in electrical power and industrial distribution systems.
  It detects under-voltage, over-voltage, phase loss, phase sequence errors, and phase unbalance, providing relay output signals for alarms or control circuit disconnection, ensuring safe and stable operation of electrical equipment and power systems.

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  2. Technical Specifications

  • Model: 1SVR730884R3300

  • Type: Three-Phase Monitoring Relay

  • Brand: ABB

  • Monitored Parameters: Three-phase voltage / current

  • Rated Voltage Range: AC 208–480 V

  • Frequency Range: 50 / 60 Hz

  • Monitoring Functions:

    • Under-voltage / Over-voltage

    • Phase loss / Phase sequence error

    • Phase unbalance

  • Time Delay: Adjustable, 0.1–30 s

  • Output Contacts: 1 NO + 1 NC (optional configuration)

  • Rated Contact Current: 5 A (AC 250 V / DC 30 V)

  • Operating Temperature: -20 to +60 °C

  • Mounting: DIN rail 35 mm

  • Protection Class: IP20

  • Power Consumption: ≤ 3 W

  • Display: LED status indicators

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  3. Key Advantages & Features

  1. Comprehensive Three-Phase Protection
     Monitors under-voltage, over-voltage, phase loss, phase sequence errors, and unbalance simultaneously.

  2. Adjustable Time Delay
     Allows configuration to prevent false trips from transient conditions.

  3. Reliable Output Contacts
     Supports alarms, remote disconnection, or interlocking control circuits.

  4. Industrial-Grade Design
     Strong anti-interference capability, suitable for harsh industrial environments.

  5. Easy Installation and Maintenance
     DIN rail mounting, clear LED status display, quick fault diagnosis.

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  4. Typical Applications

  • Industrial plant power distribution systems

  • Three-phase motor protection and control

  • Transformer low-voltage distribution monitoring

  • Production line power monitoring

  • HVAC systems and critical load supervision

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  5. Installation & Handling Notes

  1. Verify system voltage and frequency match relay ratings before installation.

  2. Wire strictly according to the wiring diagram to prevent misoperation.

  3. Avoid prolonged exposure to high humidity, high temperature, or strong vibration.

  4. Periodically check output contacts and status indicators to ensure reliable operation.

  5. Disconnect power before maintenance or replacement for safety.

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The structure and details of the product：

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