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Home > Electrical & Electronics > Electrical Control System > ABB REX521BBHGLB01C Feeder Protection Terminal

ABB REX521BBHGLB01C Feeder Protection Terminal

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Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Other, Global universal model

Condition:

Other, Global universal model

Task:

Other, Global universal model

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Guizhou Yuanmiao Automation Equipment Co., Ltd.

Payment & Shipping

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Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Material Other, Global universal model

Condition Other, Global universal model

Task Other, Global universal model

Mathematical Model Other, Global universal model

Signal Other, Global universal model

Customized Non-Customized

Structure Other, Global universal model

Operating temperature -25℃ to +55℃

Humidity 5% - 95% (non - condensing)

I. Overview

REX521BBHGLB01C is a medium-voltage network protection, control, measurement, and monitoring device. As a member of the REX521 feeder terminal family, it plays an important role in the field of power systems. Its design is highly adaptable to complex and diverse medium-voltage network environments. It can achieve stable connection and efficient operation in switchgear of single-bus, double-bus, or duplex systems, providing a solid guarantee for power networks of different scales and architectures.

II. Technical Parameters

Electrical Parameters
Operating Voltage: The rated operating voltage is 240V AC, which can adapt to common AC power supply environments, ensuring the stable operation of the device under standard power input and providing reliable energy support for various internal protection, control, and monitoring circuits.
Frequency Range: It supports operating frequencies of 50Hz or 60Hz. This feature enables it to be widely used in power systems in different regions around the world. Whether in European regions following the 50Hz standard or North American regions adopting the 60Hz standard, it can seamlessly connect to the local power grid, ensuring the continuous and accurate operation of the device.

Physical Parameters
Protection Level: It reaches IP20 protection level, which can effectively prevent solid foreign objects larger than 12mm from entering the device, providing a certain mechanical protection for internal electronic components. It is suitable for general indoor installation environments, avoiding faults such as short circuits and poor contact caused by dust and small foreign particles, and extending the service life of the device.
Installation Method: It adopts the DIN rail installation method, which is convenient and standardized. In power control cabinets and other equipment, the device can be installed and fixed by simply clamping it into the DIN rail, facilitating rapid installation and later maintenance by power engineers, and greatly improving construction efficiency and the convenience of equipment maintenance.

Environmental Parameters
Temperature Range: The operating temperature range is between -25℃ and +55℃, with strong adaptability to ambient temperature. It can operate stably whether in cold outdoor substations in northern winters or hot indoor distribution rooms in southern summers, ensuring that the protection, monitoring, and other functions of the power system are not interrupted under different climatic conditions, and guaranteeing the reliability of power supply.
Humidity Adaptability: It can work normally in environments with relatively low (but not lower than general indoor environmental humidity) to high relative humidity. The interior of the device adopts reasonable moisture-proof designs, such as moisture-proof coating treatment on circuit boards, which effectively prevents circuit short circuits, corrosion, and other problems caused by humid air, enabling it to operate stably in humid coastal areas or indoor environments with high humidity.

III. Functional Features

High-Precision Protection Functions
Wide Network Protection Adaptability: Its protection functions can support various network types, including non-earthed neutral networks, resonant earthed networks, and partially earthed networks. In non-earthed neutral networks, it can accurately detect changes in the line-to-ground capacitive current and timely discover faults such as single-phase grounding; for resonant earthed networks, it can identify faulty lines and sound lines through specific algorithms, effectively avoiding misoperation; in partially earthed networks, it can also quickly judge faults and implement protection actions based on changes in parameters such as current and voltage, providing a reliable protection barrier for medium-voltage networks with different grounding methods.
Protection for Motors and Capacitor Compensation Devices: Its application field covers the protection and control of medium-sized three-phase asynchronous motors and shunt capacitor banks used for reactive power compensation. For medium-sized three-phase asynchronous motors, it can conduct real-time monitoring and rapid protection against common faults such as overload, locked rotor, phase loss, and short circuit, avoiding motor damage due to faults, and improving the reliability and service life of motor operation; for shunt capacitor banks, it can prevent overvoltage, undervoltage, overcurrent, and unbalanced current of capacitors, ensuring the stable operation of the reactive power compensation system, improving the power factor of the power system, and optimizing power quality.

Rich Control and Monitoring Functions
Comprehensive Control Capability: It can accurately control various switching devices in the medium-voltage network, such as circuit breakers and load switches. It supports two modes: local control and remote control. In local control, operation and maintenance personnel can perform manual operations through the device's own operation interface, such as buttons and knobs; remote control receives control commands from the power monitoring center through the communication network to realize remote switching operations, greatly improving the convenience and timeliness of operations, and facilitating the centralized management and scheduling of the power system.
Real-Time Operating Parameter Monitoring: It has a powerful real-time monitoring function, which can conduct high-precision collection and analysis of operating parameters of the medium-voltage network, such as current, voltage, power, and power factor. Through the built-in high-performance processor and advanced algorithms, it quickly processes the collected data, reflecting the operating status of the power system in real time. Once abnormal parameters such as overcurrent, overvoltage, and undervoltage are found, it immediately sends out alarm signals, providing accurate fault early warning for operation and maintenance personnel, so that timely measures can be taken to ensure the safe operation of the power system.

Convenient Communication and PLC Functions
Support for Multiple Communication Standards: It has excellent data communication performance and supports a variety of communication standards, including SPA bus, LON bus, IEC 60870-5-103, IEC 61850 via SPA-ZC 400, PROFIBUS DPV1 via SPA-ZC 302, DNP 3.0, and Modbus protocol for communication with superior equipment. These rich communication protocols enable REX521BBHGLB01C to seamlessly connect with power automation equipment of different manufacturers and types, realize data sharing and collaborative work, and build an efficient and intelligent power automation system.
Powerful PLC Function Integration: It integrates a large number of PLC (Programmable Logic Controller) functions, which allow integrating multiple automation and sequential logic functions required for substation automation into one unit. For example, it can realize automatic control of switching devices according to preset logical conditions, such as automatically performing switching operations at specific times or specific operating states; it can also complete complex logical operations, comprehensively judge multiple signals, and realize more intelligent and flexible control strategies, greatly improving the level of substation automation, reducing the investment in external hardware equipment, and lowering system costs.

IV. Application Scenarios

Industrial Enterprise Distribution Systems: In the medium-voltage distribution network within industrial enterprises, REX521BBHGLB01C can be used to protect and control the power supply lines of various production equipment. For example, for multiple three-phase asynchronous motors in large factories, it can real-time monitor the operating status of the motors, timely discover and handle motor faults, ensure the continuous and stable operation of production equipment, avoid production interruptions caused by motor faults, and guarantee the normal production order of the enterprise. At the same time, it can precisely control reactive power compensation devices, improve the power factor of the internal power grid of the enterprise, reduce power loss, and save electricity costs.

Urban Distribution Networks: In urban medium-voltage distribution networks, this device can be applied to various substations and distribution rooms. It protects, controls, and monitors switchgear with single-bus or double-bus structures. By real-time collecting power grid operation data, it can timely discover line faults, quickly locate fault points, provide accurate information for maintenance personnel, shorten power outage time, improve the reliability and stability of urban power supply, and ensure the normal electricity use of residents and commercial users.

Distributed Energy Access Systems: With the wide application of distributed energy sources such as solar and wind power generation in power systems, REX521BBHGLB01C can be used for the protection and control of distributed energy access points. It monitors and regulates the power quality output by distributed power sources, ensuring that distributed energy sources are safely and stably connected to the medium-voltage power grid, realizing the coordinated operation of distributed energy sources and traditional power grids, promoting the efficient use of clean energy, and driving the optimization and upgrading of the energy structure.

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