Description
GE Multilin UR8FH
I. Product Overview
GE Multilin UR8FH is a CT/VT (Current Transformer/Voltage Transformer) module specially designed for the universal relay series, meticulously crafted by the Multilin brand under General Electric. In the complex operating environment of power systems, with its unique design, it provides key support for the precise monitoring and control of relays, becoming an important link in ensuring the stable operation of power equipment, and is widely used in various industrial and power-related scenarios.
GE Multilin UR8FH is a CT/VT (Current Transformer/Voltage Transformer) module specially designed for the universal relay series, meticulously crafted by the Multilin brand under General Electric. In the complex operating environment of power systems, with its unique design, it provides key support for the precise monitoring and control of relays, becoming an important link in ensuring the stable operation of power equipment, and is widely used in various industrial and power-related scenarios.
II. Functional Features
(1) Basics of Current and Voltage Monitoring
Configuration of Phase Current Transformers: Equipped with 3 current transformers for 1A/5A phase current measurement, which can accurately sense the real-time current conditions of each phase in the three-phase power system. Whether it is the current fluctuation during normal operation or the abnormal current that may occur in the fault state, it can quickly and accurately measure and feedback, providing key data for the relay to subsequently judge the operation state of the power system.
(1) Basics of Current and Voltage Monitoring
Configuration of Phase Current Transformers: Equipped with 3 current transformers for 1A/5A phase current measurement, which can accurately sense the real-time current conditions of each phase in the three-phase power system. Whether it is the current fluctuation during normal operation or the abnormal current that may occur in the fault state, it can quickly and accurately measure and feedback, providing key data for the relay to subsequently judge the operation state of the power system.
Setting of Ground Current Transformers: There is 1 current transformer for 1A/5A ground current measurement, which closely monitors the ground current in the power system. When a ground fault occurs, it can quickly capture the abnormal ground current signal, allowing the relay to respond in a timely manner, avoiding more serious power accidents caused by ground faults, and effectively ensuring the safety of personnel and equipment.
Voltage Transformer Terminals: It has four voltage transformer terminals, which are responsible for converting the high voltage in the power system into a manageable level voltage suitable for relay monitoring and control according to a certain ratio. By analyzing these converted voltage data, the relay can fully understand the system voltage state, and timely detect and take measures against abnormal situations such as overvoltage and undervoltage.
(2) Flexible Input Options
The CT/VT module allows users to flexibly choose voltage or contact input methods on channels 1 to 4 or channels 5 to 8. This diversified input selection enables UR8FH to adapt to different power equipment and monitoring needs, greatly improving the versatility and application flexibility of the module. Users can reasonably configure the input mode according to the actual power system structure and equipment characteristics to ensure that the module seamlessly connects with the entire system and operates efficiently.
The CT/VT module allows users to flexibly choose voltage or contact input methods on channels 1 to 4 or channels 5 to 8. This diversified input selection enables UR8FH to adapt to different power equipment and monitoring needs, greatly improving the versatility and application flexibility of the module. Users can reasonably configure the input mode according to the actual power system structure and equipment characteristics to ensure that the module seamlessly connects with the entire system and operates efficiently.
(3) Accurate Connection Guidance
The UR manual provides users with detailed guidelines for correct relay connection. The manual clearly points out key details such as channels 1 and 5 are used to connect phase A, and channels 2 and 6 are used to connect phase B, helping users accurately complete the connection between the module, the relay and other parts of the power system. At the same time, the manual also emphasizes the precautions during the connection process, for example, the nominal current (1A or 5A) connected to the relay terminal must match the secondary rating of the connected current transformer, otherwise it may cause damage to the system. Strictly following the manual's guidance can ensure the normal operation of the module and avoid faults and losses caused by incorrect connections.
The UR manual provides users with detailed guidelines for correct relay connection. The manual clearly points out key details such as channels 1 and 5 are used to connect phase A, and channels 2 and 6 are used to connect phase B, helping users accurately complete the connection between the module, the relay and other parts of the power system. At the same time, the manual also emphasizes the precautions during the connection process, for example, the nominal current (1A or 5A) connected to the relay terminal must match the secondary rating of the connected current transformer, otherwise it may cause damage to the system. Strictly following the manual's guidance can ensure the normal operation of the module and avoid faults and losses caused by incorrect connections.
(4) Comprehensive System Support
In the entire universal relay system, UR8FH is not isolated. In addition to the powerful current and voltage monitoring functions of the CT/VT module itself, the universal relay is also equipped with a Transducer Input/Output (Transducer I/O) module. This module can monitor various non-electrical parameters such as flow, wind speed, temperature, vibration or pressure with the help of DC mA (DCmA) cards or Resistance Temperature Detectors (RTD), further enriching the monitoring dimensions of the operation status of the power system. In addition, the Digital Input/Output (Digital I/O) module has up to 96 contact inputs and 64 contact outputs, building an efficient data interaction bridge between the relay and external equipment, and realizing more complex control logic and system linkage.
In the entire universal relay system, UR8FH is not isolated. In addition to the powerful current and voltage monitoring functions of the CT/VT module itself, the universal relay is also equipped with a Transducer Input/Output (Transducer I/O) module. This module can monitor various non-electrical parameters such as flow, wind speed, temperature, vibration or pressure with the help of DC mA (DCmA) cards or Resistance Temperature Detectors (RTD), further enriching the monitoring dimensions of the operation status of the power system. In addition, the Digital Input/Output (Digital I/O) module has up to 96 contact inputs and 64 contact outputs, building an efficient data interaction bridge between the relay and external equipment, and realizing more complex control logic and system linkage.
III. Technical Parameters
Dimension Specifications: Approximately 15cm in length, 18cm in width, and 4cm in height. The compact design allows it to be conveniently installed in various control cabinets, saving valuable installation space and adapting to the installation needs of power equipment with different spatial layouts.
Dimension Specifications: Approximately 15cm in length, 18cm in width, and 4cm in height. The compact design allows it to be conveniently installed in various control cabinets, saving valuable installation space and adapting to the installation needs of power equipment with different spatial layouts.
Weight Parameter: Approximately 2 pounds 9 ounces (about 1.17kg). The relatively light weight not only facilitates transportation, but also reduces the labor intensity of operators during on-site installation and maintenance, improving work efficiency.
Electrical Parameters
Input Voltage Range: The control power supply has a wide adaptation range, 40-265VAC or 50-300VDC, which can easily cope with power supply conditions in different regions and power environments. It can still operate stably when the power supply voltage fluctuates to a certain extent, ensuring the reliability of the module and the entire power monitoring system.
Input Voltage Range: The control power supply has a wide adaptation range, 40-265VAC or 50-300VDC, which can easily cope with power supply conditions in different regions and power environments. It can still operate stably when the power supply voltage fluctuates to a certain extent, ensuring the reliability of the module and the entire power monitoring system.
Measurement Accuracy: The current measurement accuracy can reach a high precision standard within its rated 1A or 5A measurement range, ensuring accurate capture of current changes; voltage measurement realizes high-precision conversion and measurement through voltage transformer terminals, providing accurate voltage data for the relay and helping it make accurate decisions.
Environmental Parameters
Operating Temperature Range: The operating temperature range is -40°F to 140°F (approximately -40°C to 60°C), and it can work stably in harsh environments such as high and low temperatures. Whether it is an outdoor substation in a frigid region or an industrial production workshop in a high-temperature environment, UR8FH can stand its ground and ensure the normal operation of the power monitoring and control system.
Operating Temperature Range: The operating temperature range is -40°F to 140°F (approximately -40°C to 60°C), and it can work stably in harsh environments such as high and low temperatures. Whether it is an outdoor substation in a frigid region or an industrial production workshop in a high-temperature environment, UR8FH can stand its ground and ensure the normal operation of the power monitoring and control system.
Storage Temperature Range: The storage temperature range is -40°F to 180°F (approximately -40°C to 82°C), which means that during equipment transportation and storage, even if there is a large temperature change, the module performance will not be significantly affected, ensuring the reliability of the equipment at different stages.
Humidity Requirement: It can work normally in an environment with a relative humidity of 5% to 95% (non-condensing). Its good moisture resistance makes it suitable for various humidity environments such as humid industrial plants and outdoor distribution rooms, avoiding internal circuit short circuits or other faults caused by humidity issues, and prolonging the service life of the equipment.
IV. Application Scenarios
Industrial Power Distribution System: In the internal power distribution network of industrial enterprises, UR8FH is used to monitor and protect key equipment such as transformers and distribution cabinets. Through real-time monitoring of phase currents, ground currents and voltages, it can timely detect abnormal situations such as overcurrent, short circuit, ground fault, overvoltage or undervoltage, provide data support for the relay, so that it can quickly take protective measures such as tripping and alarming, ensure the stable power supply of the industrial power distribution system, prevent production interruption caused by power faults, and reduce economic losses of enterprises.
Industrial Power Distribution System: In the internal power distribution network of industrial enterprises, UR8FH is used to monitor and protect key equipment such as transformers and distribution cabinets. Through real-time monitoring of phase currents, ground currents and voltages, it can timely detect abnormal situations such as overcurrent, short circuit, ground fault, overvoltage or undervoltage, provide data support for the relay, so that it can quickly take protective measures such as tripping and alarming, ensure the stable power supply of the industrial power distribution system, prevent production interruption caused by power faults, and reduce economic losses of enterprises.
Power Substations: In substations, UR8FH assists universal relays in accurately monitoring and controlling the current and voltage of transmission lines. During high-voltage power transmission, once the line has current mutations, abnormal voltage fluctuations and other situations, the module can quickly transmit information to the relay, and the relay then executes corresponding protective actions to isolate the faulty line, ensure the safe and stable operation of the entire substation and transmission network, and improve the reliability of power transmission.
Large Motor Control Systems: For large motors that drive industrial production equipment, UR8FH plays an important role in their control systems. By monitoring parameters such as current and voltage during motor operation, it cooperates with relays to realize functions such as overload protection, short circuit protection and undervoltage protection for motors. At the same time, according to parameters such as the inrush current characteristics during motor startup, as well as the cooling speed and acceleration time during operation, users can flexibly adjust the relay protection function with the support of the module, optimize the motor operation state, prolong the motor service life, and ensure the continuity and stability of industrial production.
