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 reliabilityEquipped with ABB self-developed magnetic cores and low-noise amplifier circuits, it ensures minimal error drift during long-term operation.
2. Modular designBoasts a unified interface with ABB 3BHB and 3BSE series modules, facilitating combined installation within the same cabinet.
3. Strong compatibilitySupports multiple ABB fieldbus protocols and can be directly integrated into DCS, PLC, or variable frequency drive systems.
4. Easy maintenanceIts modular structure enables quick spare part replacement, with comprehensive diagnostic information available (fault codes, status indicators).
5. Compliance with international standardsAdheres 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 InterfacePROFIBUS/PROFINET ports or analog output terminals.
• Protective HousingIP65-rated metal enclosure with internal moisture-proof design.

Typical Application Fields

• Distribution automationPower distribution cabinets, busbar monitoring, and load distribution.
• Variable frequency drive systemsProvides current feedback to VFDs to achieve closed-loop control.
• Process controlCurrent monitoring and protection in industries such as chemical engineering, petroleum, and metallurgy.
• Power systemsGenerator excitation current measurement and power factor regulation.