Description

GE Multilin SR469-P5-HI-A20

I. Overview

II. Technical Parameters

Power Parameters

• Control Voltage: It demonstrates strong adaptability, capable of operating stably within the range of 70-265V AC and 90-300V DC. Such a wide control voltage range allows it to easily interface with various control signal sources of different voltage levels—seamlessly connecting with both low-voltage small control systems and high-voltage large industrial automation systems—greatly enhancing the product's versatility and application flexibility.
• Operating Temperature: With excellent temperature adaptability, it can operate normally in the temperature range of -20°C to +60°C, and some versions can even work stably in more severe extreme temperatures from -40°C to +85°C. Whether in outdoor substations during cold northern winters or high-temperature industrial plants in hot southern summers, the relay can function stably, effectively expanding its applicable geographical areas and working scenarios.

Electrical Parameters

• Rated Current: The relay has a rated current of 5 amperes, providing precise and stable current support for medium-voltage motors to ensure their efficient operation under rated conditions.
• Load Capacity: In terms of load current, it supports current fluctuations within a certain range to meet the current demands of different motors during startup, operation, and other stages. Its strong load capacity enables it to easily handle the driving and control tasks of various high-power motors, satisfying the diverse requirements of different industrial equipment and power systems for current carrying capacity.
• Load Voltage: The load voltage range covers a wide interval, enabling good matching with medium-voltage motors of various voltage levels and providing a solid guarantee for the stable operation of motors.

Communication Parameters

• Communication Ports: Equipped with diverse communication ports, including RS-232, RS485, and RS422 ports. The RS-232 port facilitates convenient access for local computers, mainly used for on-site debugging and parameter setting of equipment, providing convenience for engineers to maintain and optimize equipment on-site. The RS485 and RS422 ports are primarily for remote communication, enabling stable connection with Distributed Control Systems (DCS), Supervisory Control and Data Acquisition (SCADA) systems, or Programmable Logic Controllers (PLC) to achieve remote monitoring and management of equipment, greatly improving the automation management level of the system. Additionally, it supports DeviceNet fieldbus communication, enabling efficient data interaction with other devices supporting this protocol and further expanding its application scope in industrial automation networks.
• Communication Protocols: Supporting multiple mainstream communication protocols such as Modbus RTU and Modbus TCP/IP, it has broad communication compatibility. This allows it to achieve good interconnection and interoperability with automation devices of different brands and types, easily integrating into various complex automation system architectures—seamlessly accessing and interacting with equipment in both traditional industrial automation control systems based on RS485 bus and emerging intelligent automation networks following industrial Ethernet standards—providing strong support for building intelligent and efficient power and industrial automation management systems.

Other Parameters

• Analog Output: Featuring four 4-20 mA analog output channels, it can output key parameters during motor operation, such as current, voltage, temperature, and other information, in the form of standard analog signals, facilitating connection to other monitoring and control systems for further analysis and processing of motor operation status.
• Input Configuration: Equipped with five secondary input interfaces for current transformers, it can accurately collect current signals during motor operation, providing a data foundation for the relay to implement various protection functions such as overcurrent protection and overload protection. Meanwhile, the relay has flexible voltage transformer (VT) input configuration, capable of adapting to the access of VT in different wiring modes such as Delta or Wye, ensuring accurate monitoring and analysis of motor operating voltage.

III. Functional Features

Comprehensive and Precise Protection Functions

• Overcurrent Protection: Using advanced current monitoring algorithms, it tracks current changes during motor operation in real time and accurately. Once the current is detected to exceed the preset overcurrent threshold, it can quickly activate the protection mechanism with millisecond-level response speed, timely cut off the circuit, and effectively prevent serious accidents such as motor overheating, insulation damage, and even fire caused by overcurrent, fully ensuring the safe and stable operation of motors and related equipment.
• Ground Fault Protection: With a sensitive ground current monitoring function, it closely monitors the ground current in the power system. When abnormal ground fault current is detected, it immediately issues a high-precision alarm signal and quickly takes effective measures such as cutting off the power supply and starting the backup protection circuit, avoiding personal electric shock hazards and other more serious power accidents caused by ground faults, and building a solid defense line for personnel safety and normal motor operation.
• Short Circuit Protection: With high-speed short circuit detection capability, it can identify short circuit faults instantly and quickly execute circuit breaking operations to prevent irreversible damage to motors and lines caused by short circuit current, ensuring that the power system can quickly return to normal operation when a short circuit fault occurs and minimizing the impact of faults on production.
• Undervoltage and Overvoltage Protection: Continuously monitoring the power supply voltage of the motor, it triggers protection actions in a timely manner when the voltage is lower than or higher than the preset normal working range. Undervoltage protection prevents the motor from overheating and damage due to inability to start or operate normally under low voltage; overvoltage protection avoids insulation damage caused by excessive voltage, extending the service life of the motor.
• Phase Loss Protection: Real-time monitoring of the three-phase power supply status of the motor. Once a phase loss is detected, it immediately takes protection measures to stop the motor operation, preventing motor winding burnout caused by single-phase operation and ensuring the stable operation of the motor under normal three-phase power supply.
• Overheat Protection: Using high-precision temperature sensors, it real-time monitors the temperature of the motor windings. When the temperature exceeds the preset safety threshold, it activates the overheat protection function, preventing motor damage due to overheating by reducing motor load or stopping motor operation, effectively protecting the core components of the motor.

Efficient Control Functions

• Solid State Control: Adopting advanced solid-state switching technology and abandoning traditional mechanical contacts, it greatly improves the reliability and service life of the relay. In application scenarios with frequent switching actions, problems such as mechanical contact wear and adhesion will not occur, effectively reducing equipment maintenance frequency and costs and ensuring long-term stable system operation.
• Fast Response: With an extremely short response time, it can complete switching actions in microsecond level, especially suitable for occasions with strict requirements on switching speed, such as instant start-stop control of motors and transmission of high-frequency pulse signals, ensuring the timely and accurate execution of control commands and improving the overall operation efficiency of the system.

Convenient Communication and Configuration Functions

• Support for Multiple Communication Protocols: Supporting multiple mainstream communication protocols such as Modbus, IEC 61850, RS485, and Modbus TCP, it has broad communication compatibility and can seamlessly integrate with various automation system architectures. Whether in traditional industrial automation control systems based on RS485 bus or emerging smart grid automation networks following IEC 61850 standard, it can easily realize equipment access and data interaction, providing strong support for building intelligent and efficient power and industrial automation management systems.
• Convenient Configuration Method: By connecting a computer running GE Multilin's special configuration software to the relay, users can obtain a powerful and easy-to-use configuration interface. In this interface, users can flexibly and accurately set various parameters of the relay, including the action threshold and time delay of protection functions, the baud rate and communication address of communication parameters, and the range and accuracy of measurement parameters. At the same time, the relay is also equipped with a complete simulation test function. Users can simulate various power system fault conditions and normal operation states on the computer to comprehensively and carefully test the operation of the relay. Through simulation testing, users can discover potential problems in advance and optimize and adjust the parameters of the relay, significantly improving the efficiency and accuracy of equipment configuration, reducing the difficulty of equipment debugging and maintenance, greatly shortening the project implementation cycle, and bringing users an efficient and convenient use experience.

High Reliability and Excellent Environmental Adaptability

• High-quality Manufacturing Guarantee: In the product manufacturing process, GE Multilin strictly follows high-standard quality systems, selects top global high-quality raw materials, and uses advanced automated manufacturing processes and strict quality detection procedures. The internal electronic components of the relay have gone through layer-by-layer screening and multiple rounds of strict testing to ensure that each component has excellent performance and extremely high reliability. In the long-term and high-intensity operation process, these high-quality components can work stably, effectively reducing the probability of equipment downtime caused by component failures, reducing maintenance costs, and providing users with long-term and reliable use guarantees, serving as a solid backing for the stable operation of power systems and industrial automation.
• Environmental Adaptability Design: Aiming at various complex and harsh environmental challenges that power systems and industrial automation may face, the relay has been comprehensively optimized in design. In industrial sites with strong electromagnetic interference or near substations, it has excellent electromagnetic interference resistance by adopting advanced electromagnetic shielding technology, optimizing circuit layout, and selecting electronic components with high anti-interference performance, and can work stably in complex electromagnetic environments without being affected by external electromagnetic interference. In some chemical enterprises, coastal areas, and other places with chemical corrosion risks, its shell and internal structure adopt materials with excellent corrosion resistance or special protective coatings to ensure that the relay can still operate normally in harsh chemical environments and effectively extend the service life of the equipment. In terms of temperature and humidity adaptability, the relay can work stably in a wide temperature range from -20°C to +60°C (some versions can reach -40°C to +85°C) and an environment with up to 95% relative humidity (non-condensing). Whether in power facilities in cold polar regions or power grid systems in high-temperature and humid tropical regions, it can reliably play its protection and control functions, demonstrating excellent environmental adaptability.

User-friendly Interface Design