ABB UNS0884a-v1 3BHE004385R0001

The ABB UNS0884a-v1 3BHE004385R0001 is a current sensor/excitation control module under ABB’s UNS series, widely used in distribution automation, variable frequency drives, and process control systems. As a standardized spare part of the UNS 0884A‑V1 series, it features high-precision current measurement and reliable signal output capabilities.

Key Technical Specifications

• Rated current range: 0 - 500 A
• Measurement accuracy: ±0.5 % (full scale)
• Output signal: 4‑20 mA standard analog signal, compatible with ABB fieldbuses (PROFIBUS, PROFINET)
• Operating temperature: -25 °C - +85 °C, meeting the requirements of industrial field environments
• Supply voltage: 24 V DC (48 V DC optional)
• Protection class: IP 65 (dustproof and waterproof), suitable for harsh field conditions
• Mounting method: DIN‑rail (standard 35 mm rail) or panel screw mounting

Product Features

1. High reliability
    

   Equipped with ABB self-developed magnetic cores and low-noise amplifier circuits, it ensures minimal error drift during long-term operation.

2. Modular design
    

   Boasts a unified interface with ABB 3BHB and 3BSE series modules, facilitating combined installation within the same cabinet.

3. Strong compatibility
    

   Supports multiple ABB fieldbus protocols and can be directly integrated into DCS, PLC, or variable frequency drive systems.

4. Easy maintenance
    

   Its modular structure enables quick spare part replacement, with comprehensive diagnostic information available (fault codes, status indicators).

5. Compliance with international standards
    

   Adheres to the IEC 61869‑2 current transformer specifications and has obtained CE and UL certifications.

Structure and Components

• Control Board (COB)
   

  Responsible for signal collection, amplification, and digital processing.

• Current Transformer (CT)
   

  The core measuring component, constructed with stacked silicon steel sheets of high magnetic permeability.

• Output Drive Circuit
   

  Enables the output of 4‑20 mA standard signals.

• Communication Interface
   

  PROFIBUS/PROFINET ports or analog output terminals.

• Protective Housing
   

  IP65-rated metal enclosure with internal moisture-proof design.

Typical Application Fields

• Distribution automation
   

  Power distribution cabinets, busbar monitoring, and load distribution.

• Variable frequency drive systems
   

  Provides current feedback to VFDs to achieve closed-loop control.

• Process control
   

  Current monitoring and protection in industries such as chemical engineering, petroleum, and metallurgy.

• Power systems
   

  Generator excitation current measurement and power factor regulation.

Installation and Maintenance Guidelines

1. Pre-installation inspection
    

   Verify that the DIN‑rail specifications, supply voltage, and fieldbus type match the on-site requirements.

2. Wiring precautions
    

   The secondary circuit of the current transformer must be closed to avoid measurement errors or module damage caused by open circuits.

3. Calibration
    

   Prior to initial commissioning, it is recommended to perform zero and full-scale calibration using the calibration tools provided by ABB.

4. Regular inspection
    

   Inspect the integrity of the housing, tightness of wiring connections, and status of diagnostic indicators every 12 months.

5. Spare part replacement
    

   In case of fault indicator activation or diagnostic code generation, quickly locate and replace the corresponding sub-module according to the ABB spare parts list (e.g., 3BHB006208R0001, 3BHB006943R0001, etc.).

If you would like to learn more about our products and services, please feel free to contact us at any time!

• Sales Manager : Jinny
• Email : sales5@xrjdcs.com
• Whatsapp/Mobile:+86 15359273791

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