Description
Product Introduction
The ABB REF545KB133AAAA is a versatile feeder protection relay designed for industrial and utility medium-voltage applications. This intelligent electronic device (IED) from ABB’s renowned Relion® product line provides comprehensive protection, control, measurement, and monitoring for feeders, motors, and transformers. Engineered for demanding environments, the integrates advanced functionalities into a compact and user-friendly package, ensuring high availability and security of electrical assets.
Product Description
The ABB REF545KB133AAAA relay is a cornerstone of modern electrical protection schemes. It combines multiple protection functions such as overcurrent, earth-fault, thermal overload, and voltage protection with advanced features like disturbance recording and energy measurement. Its communication capabilities support multiple protocols, including IEC 61850, enabling seamless integration into digital substations and SCADA systems. The device features a clear, graphical local human-machine interface (HMI) for easy configuration and operation, reducing commissioning and maintenance time. For robust feeder management, the offers unparalleled reliability. Key to any protection panel, this model ensures precise coordination and fast fault clearance to minimize downtime.
Product Parameters
- Protection Functions: Three-phase non-directional overcurrent (ANSI 50/51, 50N/51N), directional earth-fault (67N), thermal overload for feeders (49), two-step undervoltage (27) and overvoltage (59), breaker failure (50BF).
- Control Functions: Circuit breaker control, synchrocheck (25), auto-reclosing (79), and programmable logic (CFC).
- Measurement & Monitoring: True RMS values of currents, voltages, power, power factor, frequency, energy, and demand. Extensive event logging and disturbance recording (DR) with oscillographic data.
- Communication: Front port for PC connection, rear communication modules supporting IEC 61850, Modbus TCP/RTU, DNP3.0, and IEC 60870-5-103/104.
- Power Supply: Available for a wide range of DC (24-250V) and AC (110-240V) supply voltages.
- Standards: Compliant with IEC 60255, IEC 61000, and IEEE C37.90.
Advantages and Features
The ABB REF545KB133AAAA stands out due to its exceptional flexibility and ease of use. Its configurable programmable logic allows for extensive customization without requiring additional hardware. The relay’s robust construction ensures high immunity to electromagnetic interference, guaranteeing stable operation in harsh electrical environments. A significant advantage is its seamless interoperability within ABB’s system architecture and third-party systems, thanks to comprehensive protocol support. The intuitive PCM600 configuration tool simplifies setting management, making the efficient throughout its lifecycle.
Application Cases in Industry
- Manufacturing Plant Power Distribution: In an automotive plant, multiple ABB REF545KB133AAAA units are deployed to protect incoming feeders and critical motor circuits. They provide selective fault clearing, preventing a single fault from causing a full plant blackout, while thermal overload protection safeguards expensive motors.
- Renewable Energy Integration: At a solar farm substation, these relays protect the feeder connecting the inverter station to the main grid. Their voltage and frequency protection functions ensure compliance with grid codes, and directional earth-fault protection enhances safety for the extended cable network.
- Commercial Building Infrastructure: Used in hospital or data center medium-voltage switchgear, the relay ensures uninterrupted power to essential loads. Its accurate measurement capabilities facilitate energy management and cost allocation.
Comparison with Competing Products
Compared to similar feeder relays from competitors like Siemens (7SJ series) or Schneider Electric (MiCOM P1 series), the offers a highly competitive feature set. Its key differentiator is often the depth of integration within the ABB ecosystem (like System 800xA) and the powerful, user-friendly PCM600 engineering tool. While core protection functions are comparable, the ABB REF545KB133AAAA frequently excels in the flexibility of its application logic and the clarity of its local HMI. It provides a strong balance between advanced functionality for complex applications and straightforward operation for standard feeder protection duties. 
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