ABB CM-PVN 1SVR450302R1700 Three-phase monitoring relay

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• 1. Product Description

  The ABB CM-PVN 1SVR450302R1700 Three-phase Monitoring Relay is a high-precision digital relay designed for monitoring voltage, current, and phase sequence in three-phase power systems. It provides real-time detection of overvoltage, undervoltage, phase failure, and unbalance conditions, with fast alarm and control outputs, effectively protecting motors, drives, and other electrical equipment from abnormal power conditions. Suitable for industrial distribution systems, automation control, and motor protection.

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  2. Technical Specifications

  • Model: CM-PVN 1SVR450302R1700

  • Type: Three-phase Monitoring Relay

  • Supply Voltage: AC 110–240 V or DC 24–60 V (depending on configuration)

  • Monitoring Parameters: Three-phase voltage, current, phase sequence

  • Functions: Overvoltage, undervoltage, phase failure, phase sequence error, unbalance protection

  • Output Type: Relay output, SPDT, rated 5 A / 250 V AC

  • Response Time: < 200 ms

  • Display: LED / LCD for voltage, current, and relay status

  • Accuracy: ±1%

  • Operating Temperature: -20 ℃ to +60 ℃

  • Storage Temperature: -40 ℃ to +70 ℃

  • Mounting: DIN rail

  • Protection Class: IP20

  • Communication Interface: Optional Modbus RTU (RS485)

  • Standards Compliance: IEC 60255, CE

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  3. Advantages and Key Features

  • High-precision monitoring with ±1% accuracy for reliable relay operation.

  • Comprehensive protection functions including overvoltage, undervoltage, phase failure, phase sequence error, and voltage unbalance protection.

  • Fast response (<200 ms) to quickly disconnect abnormal circuits, protecting motors and loads.

  • Intuitive display and operation with LED/LCD for real-time voltage, current, and status information.

  • Remote monitoring capability via RS485/Modbus for centralized management.

  • Industrial-grade reliability with modular design, high temperature tolerance, and vibration resistance.

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  4. Typical Applications

  • Industrial low- and medium-voltage distribution systems

  • Motor and drive monitoring and protection

  • Distribution boards and control cabinets

  • Factory automation and building automation systems

  • Energy management and remote monitoring systems

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  5. Precautions

  • Disconnect power before installation or wiring to prevent electric shock or device damage.

  • Select relay model according to rated voltage, current, and application requirements.

  • Avoid exposure to high humidity, corrosive, or strong electromagnetic environments.

  • Regularly inspect relay outputs and terminal connections.

  • When using Modbus communication, ensure proper addressing and baud rate configuration to avoid conflicts.

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The structure and details of the product：

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