Description
GE Multilin UR8HH
I. Overview
GE Multilin UR8HH is a CT/VT module meticulously developed by General Electric (GE) specifically for universal relay systems, playing a vital role in the field of monitoring and control of power systems. With advanced design concepts and exquisite manufacturing techniques, it provides solid and reliable guarantees for the stable operation of various electrical equipment. This module is mainly responsible for the precise measurement of current and voltage, capable of efficiently collecting relevant data in power systems, and providing strong data support for subsequent in-depth analysis and scientific decision-making. It is widely used in numerous fields such as power distribution, energy management, industrial automation, and renewable energy systems, and is a key supporting equipment to ensure the efficient and safe operation of power systems.
GE Multilin UR8HH is a CT/VT module meticulously developed by General Electric (GE) specifically for universal relay systems, playing a vital role in the field of monitoring and control of power systems. With advanced design concepts and exquisite manufacturing techniques, it provides solid and reliable guarantees for the stable operation of various electrical equipment. This module is mainly responsible for the precise measurement of current and voltage, capable of efficiently collecting relevant data in power systems, and providing strong data support for subsequent in-depth analysis and scientific decision-making. It is widely used in numerous fields such as power distribution, energy management, industrial automation, and renewable energy systems, and is a key supporting equipment to ensure the efficient and safe operation of power systems.
II. Technical Parameters
(1) Input Characteristics
Current Transformer (CT) Specifications: It has strong current collection capability, providing 3 sets of 1A or 5A phase current transformers (CTs), which can fully meet the diverse needs of different power systems for phase current monitoring. At the same time, it is equipped with 1A or 5A ground current transformers (CTs), which can sensitively capture subtle changes in ground current, providing key data support for the ground protection of the system. Whether in low-voltage distribution systems or high-voltage transmission networks, these CT specifications can be accurately adapted to ensure the accurate collection and stable transmission of current signals.
(1) Input Characteristics
Current Transformer (CT) Specifications: It has strong current collection capability, providing 3 sets of 1A or 5A phase current transformers (CTs), which can fully meet the diverse needs of different power systems for phase current monitoring. At the same time, it is equipped with 1A or 5A ground current transformers (CTs), which can sensitively capture subtle changes in ground current, providing key data support for the ground protection of the system. Whether in low-voltage distribution systems or high-voltage transmission networks, these CT specifications can be accurately adapted to ensure the accurate collection and stable transmission of current signals.
Voltage Transformer (VT) Configuration: It adopts a four-terminal voltage transformer design, which can stably and accurately measure the system voltage. Its high-precision collection of voltage signals makes the monitoring of voltage parameters in the power system more reliable during operation. UR8HH can easily handle common voltage levels such as 100V and 120V, providing stable voltage monitoring guarantees for the normal operation of power equipment.
Input Resolution and Accuracy: In the signal collection process, UR8HH shows excellent performance. For current measurement, the accuracy can reach ±1% of the reading, which can accurately reflect the actual value of the current, and can accurately capture changes even under working conditions with complex current fluctuations. The voltage measurement accuracy is as high as ±0.5% of the reading. This high accuracy ensures the fine monitoring of the power system voltage, effectively reduces the risk of equipment failure caused by measurement errors, and provides a reliable data basis for the stable operation of the power system.
(2) Diagnostic Function Parameters
Hardware Health Diagnosis: UR8HH has a built-in comprehensive and intelligent hardware health diagnosis system. At the initial stage of equipment startup, the system will conduct a comprehensive health check on key components such as the core chip, peripheral circuits, signal input interfaces, and data processing units inside the module in accordance with preset strict standard operating procedures. During the operation of the equipment, this diagnostic monitoring is continuous, like an indefatigable guardian, monitoring the operating status of the hardware in real-time. Once hardware failure hidden dangers such as chip overheating, circuit short circuit, and component aging are detected, the module will immediately trigger the internal alarm logic, quickly send out alarm signals, and at the same time, record in detail the fault code, fault occurrence time, and related operating data. This detailed information can help operation and maintenance personnel quickly locate the fault point, accurately determine the cause of the fault, and thus take effective maintenance measures, greatly shortening the equipment downtime and improving the availability and maintenance efficiency of the equipment.
Hardware Health Diagnosis: UR8HH has a built-in comprehensive and intelligent hardware health diagnosis system. At the initial stage of equipment startup, the system will conduct a comprehensive health check on key components such as the core chip, peripheral circuits, signal input interfaces, and data processing units inside the module in accordance with preset strict standard operating procedures. During the operation of the equipment, this diagnostic monitoring is continuous, like an indefatigable guardian, monitoring the operating status of the hardware in real-time. Once hardware failure hidden dangers such as chip overheating, circuit short circuit, and component aging are detected, the module will immediately trigger the internal alarm logic, quickly send out alarm signals, and at the same time, record in detail the fault code, fault occurrence time, and related operating data. This detailed information can help operation and maintenance personnel quickly locate the fault point, accurately determine the cause of the fault, and thus take effective maintenance measures, greatly shortening the equipment downtime and improving the availability and maintenance efficiency of the equipment.
Signal Integrity Diagnosis: For the connected CT and VT input signals, UR8HH has strong signal integrity diagnosis capabilities. It can monitor the validity of the signal in real-time, and through complex and sophisticated algorithms, in-depth analysis of the signal's waveform, amplitude, frequency and other characteristics, accurately judge whether the signal has abnormalities such as distortion, interruption, and interference. For example, when the power system is subjected to external electromagnetic interference, causing short-term fluctuations in CT or VT signals, UR8HH can quickly identify the interference signal and accurately distinguish it from the real fault signal, effectively avoiding unnecessary protection actions caused by misjudgment. In addition, the module will also continuously record the internal DC voltage level, and through the analysis of voltage data, timely find potential problems related to the power supply, and carry out preventive maintenance in advance to ensure that the module can operate stably and reliably under various complex working conditions.
(3) Power Parameters
Power Supply Voltage Range: In terms of power supply adaptability, UR8HH performs excellently. It supports a wide range of AC voltage input, with a voltage range of 85 - 265V AC, which can adapt to the differences in power supply voltage in different regions and application scenarios. At the same time, it is also compatible with 100 - 300V DC input, providing convenience for some special power systems using DC power supply. This wide voltage range design enables UR8HH to work stably in various power infrastructure environments without complex adaptation modifications due to changes in power supply voltage, greatly improving its application flexibility and versatility.
Power Supply Voltage Range: In terms of power supply adaptability, UR8HH performs excellently. It supports a wide range of AC voltage input, with a voltage range of 85 - 265V AC, which can adapt to the differences in power supply voltage in different regions and application scenarios. At the same time, it is also compatible with 100 - 300V DC input, providing convenience for some special power systems using DC power supply. This wide voltage range design enables UR8HH to work stably in various power infrastructure environments without complex adaptation modifications due to changes in power supply voltage, greatly improving its application flexibility and versatility.
Power Consumption: Under normal working conditions, the power consumption of UR8HH is controlled at a low level. The module adopts advanced energy-saving technologies and optimized circuit design internally, effectively reducing energy consumption. Its typical power consumption is only [specific power consumption value] watts, which has obvious energy-saving advantages among similar products. The low power consumption feature not only helps reduce the operating cost of the entire power system and energy waste, but also reduces the heating problem during equipment operation, improves the stability and service life of the equipment, and is especially suitable for application scenarios with strict requirements on energy efficiency and equipment heat dissipation conditions, such as power monitoring in data centers and control of distributed energy systems.
III. Functional Features
(1) Accurate Measurement and Signal Processing
Advanced Measurement Algorithms: UR8HH has built-in advanced measurement algorithms, which are the core technical support for its accurate measurement. They fully consider complex factors such as harmonic interference, frequency fluctuations, and load changes common in power systems. Through a series of advanced signal processing technologies such as digital filtering, adaptive adjustment, and fast Fourier transform, they can process the collected current and voltage signals at high speed and accurately. Under complex power working conditions, such as short-circuit faults and load mutations in the power system, these algorithms can quickly and accurately extract real and accurate fundamental wave signals, effectively remove noise interference, and thus achieve accurate measurement of power parameters. Whether it is power calculation and power quality analysis during steady-state operation, or fast fault current detection and fault location during transient faults, UR8HH can rely on its excellent algorithm performance to provide reliable data support for the protection and control of the power system, ensuring the safe and stable operation of the power system.
(1) Accurate Measurement and Signal Processing
Advanced Measurement Algorithms: UR8HH has built-in advanced measurement algorithms, which are the core technical support for its accurate measurement. They fully consider complex factors such as harmonic interference, frequency fluctuations, and load changes common in power systems. Through a series of advanced signal processing technologies such as digital filtering, adaptive adjustment, and fast Fourier transform, they can process the collected current and voltage signals at high speed and accurately. Under complex power working conditions, such as short-circuit faults and load mutations in the power system, these algorithms can quickly and accurately extract real and accurate fundamental wave signals, effectively remove noise interference, and thus achieve accurate measurement of power parameters. Whether it is power calculation and power quality analysis during steady-state operation, or fast fault current detection and fault location during transient faults, UR8HH can rely on its excellent algorithm performance to provide reliable data support for the protection and control of the power system, ensuring the safe and stable operation of the power system.
Signal Isolation and Anti-Interference: In order to cope with the complex and changeable industrial environment with strong electromagnetic interference, UR8HH adopts multiple signal isolation technologies in hardware design. In the analog input channel, through high-performance isolation transformers and optocouplers, the externally input current and voltage signals are electrically isolated from the internal circuit, effectively blocking the conduction path of electromagnetic interference and preventing external interference signals from affecting internal data processing. At the same time, shielded cables and anti-interference wiring design are adopted in the data transmission lines to further enhance the module's resistance to electromagnetic interference. In addition, the module also integrates anti-interference software algorithms, which can real-time correct and repair the interfered signals. This all-round and multi-level anti-interference measure ensures that UR8HH can still stably and accurately collect and transmit signals in high electromagnetic interference environments, such as large industrial plants, high-voltage substations, and near electrified railways, providing a solid guarantee for the reliable operation of the power system.
(2) High Integration and Flexible Configuration
Modular Design Concept: UR8HH adopts an advanced modular design concept, which perfectly adapts to the universal relay system. This modular design allows users to flexibly select different numbers and types of UR8HH modules for combination according to the scale, complexity of the actual power system and specific monitoring needs. For small power systems, it may only need to configure 1 - 2 UR8HH modules to meet the current and voltage monitoring needs of key equipment; for complex scenarios such as large regional grid substations and power monitoring systems in industrial parks, multiple UR8HH modules can be cascaded to achieve comprehensive and detailed monitoring of many electrical equipment. This modular design not only improves the scalability of the system, facilitates users to upgrade and transform the system according to needs, but also reduces the installation, commissioning and maintenance costs of the equipment, providing great convenience for users.
Modular Design Concept: UR8HH adopts an advanced modular design concept, which perfectly adapts to the universal relay system. This modular design allows users to flexibly select different numbers and types of UR8HH modules for combination according to the scale, complexity of the actual power system and specific monitoring needs. For small power systems, it may only need to configure 1 - 2 UR8HH modules to meet the current and voltage monitoring needs of key equipment; for complex scenarios such as large regional grid substations and power monitoring systems in industrial parks, multiple UR8HH modules can be cascaded to achieve comprehensive and detailed monitoring of many electrical equipment. This modular design not only improves the scalability of the system, facilitates users to upgrade and transform the system according to needs, but also reduces the installation, commissioning and maintenance costs of the equipment, providing great convenience for users.
Software Configuration Flexibility: With the EnerVista UR software platform, users can easily configure parameters and set functions for UR8HH. The software provides an intuitive and user-friendly graphical operation interface, supporting multiple languages, so that both experienced power engineers and technical personnel new to the power field can quickly get started. Through the software, users can flexibly adjust key settings such as the module's measurement range, alarm threshold, communication parameters, and data sampling frequency according to the actual operation requirements of the power system, realizing personalized and refined monitoring and control of the power system. For example, users can dynamically adjust the alarm threshold according to the changes in power load in different seasons and time periods to improve the accuracy and timeliness of monitoring. At the same time, the EnerVista UR software also has powerful remote management functions. Users can remotely connect to the UR8HH module through the network, view the equipment operation status in real-time, modify configuration parameters, download historical data, etc., which greatly improves the efficiency and convenience of equipment management and realizes the intelligent management of the power system.
(3) High Reliability and Stability
Selection of Industrial-Grade Components: In the hardware manufacturing process, GE strictly follows high-quality standards and selects industrial-grade high-quality electronic components. From core microprocessors, high-precision A/D converters to ordinary resistors, capacitors, inductors and other components, each has undergone strict screening and aging tests to ensure that they can maintain stable and reliable performance in harsh industrial environments. All components have the characteristics of high temperature resistance, moisture resistance, and electromagnetic interference resistance, and can adapt to the complex and changeable operating conditions of the power system. For example, the core chip uses an industrial-grade high-performance processor with strong data processing capability and high stability, which can operate continuously and stably in high-temperature environments, ensuring that the module can work accurately and efficiently under various complex conditions. This strict control over the quality of components lays a solid foundation for the high reliability and long service life of UR8HH.
Selection of Industrial-Grade Components: In the hardware manufacturing process, GE strictly follows high-quality standards and selects industrial-grade high-quality electronic components. From core microprocessors, high-precision A/D converters to ordinary resistors, capacitors, inductors and other components, each has undergone strict screening and aging tests to ensure that they can maintain stable and reliable performance in harsh industrial environments. All components have the characteristics of high temperature resistance, moisture resistance, and electromagnetic interference resistance, and can adapt to the complex and changeable operating conditions of the power system. For example, the core chip uses an industrial-grade high-performance processor with strong data processing capability and high stability, which can operate continuously and stably in high-temperature environments, ensuring that the module can work accurately and efficiently under various complex conditions. This strict control over the quality of components lays a solid foundation for the high reliability and long service life of UR8HH.
Redundant Design and Fault-Tolerant Mechanism: To further improve the reliability and stability of the system, UR8HH adopts redundant design in key circuit parts. For example, in the power input circuit, a redundant power module is equipped. When one power module fails, the other power module can immediately switch seamlessly, continue to provide stable power supply for the module, and ensure that the equipment will not stop due to power failure. In terms of data storage and transmission, a fault-tolerant mechanism is introduced, and error correction coding technology and data backup strategies are adopted. When data transmission errors or storage abnormalities occur, the system can automatically perform data verification and repair to ensure the integrity and accuracy of the data. At the same time, the module also has a self-repair function. When encountering some minor faults, it can automatically adjust the working state and resume normal operation without manual intervention. These redundant designs and fault-tolerant mechanisms greatly enhance the fault resistance of UR8HH under complex working conditions, effectively improve the stability and reliability of the power system operation, and reduce the risk of power outage caused by equipment failure.
IV. Application Fields
(1) Substation Automation System
Equipment Monitoring and Protection: In the substation, UR8HH is responsible for real-time monitoring of current and voltage of various electrical equipment, such as transformers, circuit breakers, disconnectors, busbars, etc. Through accurate measurement and analysis of the operating parameters of these equipment, potential fault hidden dangers such as overheating, overload, insulation aging, and poor contact of the equipment can be found in time. For example, when the transformer winding has local overheating, its current and voltage will change slightly. UR8HH can quickly capture these changes, and by comparing with the preset alarm threshold, once it exceeds the threshold, it will immediately trigger an alarm signal, notify the operation and maintenance personnel to take timely measures, such as adjusting the load and carrying out equipment maintenance, to avoid further expansion of the fault and ensure the safe and stable operation of substation equipment. At the same time, UR8HH can also provide accurate current and voltage signals for the relay protection device of the equipment, ensuring that when a fault occurs, the protection device can act quickly and accurately, cut off the faulty equipment, prevent the spread of the accident, and improve the power supply reliability of the substation.
(1) Substation Automation System
Equipment Monitoring and Protection: In the substation, UR8HH is responsible for real-time monitoring of current and voltage of various electrical equipment, such as transformers, circuit breakers, disconnectors, busbars, etc. Through accurate measurement and analysis of the operating parameters of these equipment, potential fault hidden dangers such as overheating, overload, insulation aging, and poor contact of the equipment can be found in time. For example, when the transformer winding has local overheating, its current and voltage will change slightly. UR8HH can quickly capture these changes, and by comparing with the preset alarm threshold, once it exceeds the threshold, it will immediately trigger an alarm signal, notify the operation and maintenance personnel to take timely measures, such as adjusting the load and carrying out equipment maintenance, to avoid further expansion of the fault and ensure the safe and stable operation of substation equipment. At the same time, UR8HH can also provide accurate current and voltage signals for the relay protection device of the equipment, ensuring that when a fault occurs, the protection device can act quickly and accurately, cut off the faulty equipment, prevent the spread of the accident, and improve the power supply reliability of the substation.
Power Parameter Acquisition and Analysis: Provide comprehensive and accurate power parameters for the substation automation system, such as active power, reactive power, power factor, frequency, harmonic content, etc. These parameters are crucial for the economic operation scheduling, power quality evaluation, and power grid stability analysis of the substation. Through real-time acquisition and long-term data analysis of these parameters, operation and maintenance personnel can deeply understand the operation status of the substation, optimize the power scheduling strategy, improve energy utilization efficiency, and reduce power grid loss. For example, according to the change of power factor, reasonably adjust the switching of capacitors to improve the power factor, reduce the transmission of reactive power, and reduce line loss; through monitoring the harmonic content, timely find the harmonic source and take corresponding treatment measures to ensure the power quality of the power system and the normal operation of power equipment.
(2) Industrial Power Monitoring
Power Distribution System in Large Industrial Enterprises: In large industrial enterprises such as steel, chemical, metallurgy, and automobile manufacturing, the stable operation of the power system is directly related to the production efficiency and economic benefits of the enterprise. UR8HH can conduct all-round monitoring of the internal power distribution system of the enterprise, and real-time grasp the power consumption of each production workshop and important equipment. Through accurate monitoring of current and voltage, abnormal power consumption phenomena caused by equipment failure, line aging, overload operation, etc., such as short circuit, electric leakage, phase loss, overcurrent, etc., can be found in time, the fault circuit can be quickly cut off, the safety of equipment and personnel can be protected, production interruption caused by power failure can be avoided, and the economic loss of the enterprise can be reduced. For example, in the steelmaking workshop of a steel enterprise, UR8HH can real-time monitor the power parameters of large equipment such as steelmaking furnaces and rolling mills. Once an abnormality is found, it will immediately alarm and take corresponding protection measures to ensure the continuity and stability of the production process.
Power Distribution System in Large Industrial Enterprises: In large industrial enterprises such as steel, chemical, metallurgy, and automobile manufacturing, the stable operation of the power system is directly related to the production efficiency and economic benefits of the enterprise. UR8HH can conduct all-round monitoring of the internal power distribution system of the enterprise, and real-time grasp the power consumption of each production workshop and important equipment. Through accurate monitoring of current and voltage, abnormal power consumption phenomena caused by equipment failure, line aging, overload operation, etc., such as short circuit, electric leakage, phase loss, overcurrent, etc., can be found in time, the fault circuit can be quickly cut off, the safety of equipment and personnel can be protected, production interruption caused by power failure can be avoided, and the economic loss of the enterprise can be reduced. For example, in the steelmaking workshop of a steel enterprise, UR8HH can real-time monitor the power parameters of large equipment such as steelmaking furnaces and rolling mills. Once an abnormality is found, it will immediately alarm and take corresponding protection measures to ensure the continuity and stability of the production process.
Control of Industrial Automation Production Lines: It closely cooperates with various equipment in industrial automation production lines to provide accurate current and voltage feedback signals for the automation control system. In the automated production process, the operating state of the equipment is closely related to power parameters. By real-time monitoring the changes of power parameters, UR8HH can timely adjust the operating parameters of the equipment to ensure the stable operation of the production line. For example, in the automobile manufacturing production line, UR8HH can real-time monitor and control the power parameters of key equipment such as welding robots, painting equipment, and assembly robots, ensuring the stability and accuracy of equipment operation, and improving product quality and production efficiency. When the current or voltage of the welding robot fluctuates, UR8HH can quickly feed back the signal to the automation control system, and the system automatically adjusts the welding parameters according to the preset program to ensure that the welding quality is not affected.
(3) Smart Grid and Distributed Energy Access
Monitoring and Management of Distributed Power Sources: With the increasing proportion of distributed energy sources such as solar energy, wind energy, and hydropower in the smart grid, the monitoring and management of distributed power sources have become increasingly important. UR8HH can be used to monitor the output current and voltage of distributed power sources, such as photovoltaic power stations, wind farms, and small hydropower stations, and real-time grasp their power generation status and power quality. Through the analysis of these data, the optimal scheduling and control of distributed power sources can be realized to ensure their safe and stable grid-connected operation with the power grid. For example, when the output power of a photovoltaic power station fluctuates due to changes in light intensity, UR8HH can timely detect changes in current and voltage, and transmit the data to the smart grid control system. By adjusting the working parameters of the inverter, the power fluctuation is smoothed, and the power quality and reliability of the distributed power source are improved. At the same time, UR8HH can also accurately measure the power generation of distributed power sources, providing data support for the transaction settlement of the electricity market.
Monitoring and Management of Distributed Power Sources: With the increasing proportion of distributed energy sources such as solar energy, wind energy, and hydropower in the smart grid, the monitoring and management of distributed power sources have become increasingly important. UR8HH can be used to monitor the output current and voltage of distributed power sources, such as photovoltaic power stations, wind farms, and small hydropower stations, and real-time grasp their power generation status and power quality. Through the analysis of these data, the optimal scheduling and control of distributed power sources can be realized to ensure their safe and stable grid-connected operation with the power grid. For example, when the output power of a photovoltaic power station fluctuates due to changes in light intensity, UR8HH can timely detect changes in current and voltage, and transmit the data to the smart grid control system. By adjusting the working parameters of the inverter, the power fluctuation is smoothed, and the power quality and reliability of the distributed power source are improved. At the same time, UR8HH can also accurately measure the power generation of distributed power sources, providing data support for the transaction settlement of the electricity market.
Microgrid Protection and Control: In the microgrid system, UR8HH, as a key monitoring and control module, conducts comprehensive monitoring of power sources, loads, and lines in the microgrid. Through accurate measurement of current and voltage, real-time evaluation of the operation state of the microgrid can be realized, and faults can be found and handled in time. For example, when a line short-circuit fault occurs in the microgrid, UR8HH can quickly detect the sudden change of fault current, quickly trigger the protection device, cut off the fault line, and protect the safe operation of other equipment in the microgrid. At the same time, it can also participate in the power balance control and energy optimization management of the microgrid according to the operation needs of the microgrid, realize the coordinated operation between distributed power sources, energy storage devices, and loads in the microgrid, and improve the operation efficiency and reliability of the microgrid. For example, when the load is low at night, UR8HH detects that there is excess power in the microgrid, and can control the energy storage device to charge; during the peak load during the day, control the energy storage device to discharge to supplement the power supply and maintain the power balance of the microgrid.
