Description
ABB UNS4881B, V4 3BHE009949R0004 is a high-performance universal numerical protection and control unit designed for medium and high-voltage power systems. Engineered to ensure reliable protection, monitoring, and control of electrical networks, this advanced device is part of ABB’s Relion series, renowned for precision and innovation. UNS4881B, V4 3BHE009949R0004 integrates multiple protection functions, including overcurrent, distance, differential, and autoreclosure, making it suitable for substations, power generation plants, and industrial applications. Its modular design and compatibility with IEC 61850 standards enable seamless integration into smart grids, enhancing system efficiency and reducing downtime.
| Parameter |
Specification |
| Type |
Numerical Protection and Control Unit |
| Voltage Range |
57.7 V–240 V (AC/DC auxiliary power) |
| Current Range |
1 A–5 A (secondary current inputs) |
| Communication Protocols |
IEC 61850, Modbus RTU/TCP, DNP3 |
| Protection Functions |
Overcurrent, earth fault, distance, differential, breaker failure, autoreclosure |
| Analog Inputs |
16 x analog inputs (0–1 V, 0–5 V, 4–20 mA) |
| Digital I/Os |
32 x digital inputs, 24 x digital outputs |
| Frequency Range |
45 Hz–65 Hz |
| Operating Temperature |
-40°C to +70°C |
| Certifications |
IEC 61000-6-2, IEC 61000-6-3, IEC 61850 |
ABB UNS4881B, V4 3BHE009949R0004 stands out for its high-speed processing (response time <10 ms) and advanced self-diagnostic capabilities, which reduce maintenance costs by up to 60%. Its multi-functionality eliminates the need for multiple standalone devices, saving up to 50% panel space. The device supports cybersecurity features like secure boot and encrypted communication, compliant with IEC 62443 standards. In a 132 kV substation case, the unit reduced fault clearance time by 30% and improved data transmission accuracy to 99.9%.
Industry Applications:
- Power Transmission/Distribution: Substations, ring main units (RMUs), and grid automation.
- Industrial Sector: Oil and gas, mining, and large-scale manufacturing plants.
- Renewable Energy: Solar/wind farms and energy storage systems (ESS).
Case Study: A global mining company deployed UNS4881B, V4 3BHE009949R0004 in its 110 kV mine substation to protect critical electrical infrastructure. The unit’s real-time monitoring and fast fault detection minimized downtime by 40%, while its IEC 61850 compatibility enabled remote management, reducing on-site visits by 50%.
Compared to traditional electromechanical relays, UNS4881B, V4 3BHE009949R0004 offers software-configurable protection logic, eliminating hardware reconfiguration costs. Unlike some competitors’ units, it features a built-in web server for remote access and supports redundant communication paths, enhancing system reliability. Its wide temperature range and rugged design also make it suitable for harsh environments where alternative solutions may fail.
- Functionality: Match protection requirements (e.g., distance protection for transmission lines, overcurrent for distribution networks).
- Communication Needs: Prioritize IEC 61850 for smart grids or Modbus for legacy systems.
- Environment: Ensure the unit’s temperature and vibration ratings align with site conditions (e.g., outdoor vs. indoor use).
- Scalability: Choose models with expandable I/O modules for future system upgrades.
- Installation: Ensure proper grounding to prevent electromagnetic interference (EMI); maintain clearances for heat dissipation.
- Configuration: Use ABB’s Relion Configurator software for parameter setup and validate settings before commissioning.
- Cybersecurity: Regularly update firmware to patch vulnerabilities; restrict access to authorized personnel only.
- Testing: Perform annual functional tests using a secondary injection test set to verify protection accuracy.
Shanxi Xinyeda International Trading Co., Ltd. is your trusted partner, we provide and other automation spare parts sales and technical support. Please visit our website www.xydcontrol.com or contact us and we will be happy to serve you.
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