SR469-P5- HI – A20-E Motor Management Relay

Description

SR469-P5-HI-A20-E is a highly advanced motor management relay designed for seamless integration with medium voltage motors. Its working principle is to continuously and accurately measure a series of electrical parameters. This relay is equipped with a 5-ampere phase current transformer (CT) secondary winding, which can accurately measure the current passing through each phase of the motor. Combined with the voltage measurement function (which is compatible with control power sources of 70-265 volts AC and 90-300 volts DC), the relay uses complex algorithms to process these data.

SR469-P5-HI-A20-E

These algorithms aim to calculate important parameters such as power, electrical energy, power factor, and detect abnormal conditions. For example, in the event of overload (i.e. current exceeding the normal operating range and lasting for a long time), the relay’s algorithm can recognize this deviation. Similarly, it can quickly detect short circuits by analyzing sudden peak currents and detect phase imbalances by comparing the current values of the three phases.

In industrial control systems, SR469-P5-HI-A20-E is strategically placed between the motor and power supply. It is connected to the motor through current transformers and voltage transformers (VT) to collect real-time data. Then, the relay transmits this data to a wider control system through multiple interfaces. It can be easily integrated with programmable logic controllers (PLCs), monitoring and data acquisition (SCADA) systems, or other motor control centers.

This relay has an analog output function of 4-20mA, which can be used as a means to transmit real-time information on the operating conditions of the motor (such as current size or power consumption) to other monitoring or control devices in the system. This enables centralized monitoring and control, allowing operators to make informed decisions quickly.

SR469-P5-HI-A20-E

Technical specifications:
Model number SR469-P5-HI-A20-E
Brand GE
Motor management relay with enhanced functionality
Current transformer secondary winding 5 ampere phase
Control power supply 70-265 volts AC, 90-300 volts DC
Frequency range 48-62 Hz
Analog output 4-20mA
Advanced thermal model with multiple resistance temperature detector (RTD) inputs for stator thermal protection
Communication interface standard RS232 and RS485 serial ports; Optional Ethernet (for high-speed data transmission and remote monitoring)
Enhanced front panel with large LCD 40 character display, providing clear and detailed motor status, diagnostic information, and parameter values
The environmental level is applicable to general industrial environments; Capable of withstanding normal levels of dust, humidity, and temperature changes
Installation method: rack mounted or panel mounted, providing installation flexibility according to the control cabinet settings
Programmable baud rate RS-232 programming port interface default baud rate is 9600, programmable up to 19200 to meet custom communication speed requirements
The front panel features motor and output status indicator lights for quick visual evaluation; Unit indicator light; A numeric keypad for easy input; Control and programming keys, including reset, exit, and menu buttons, to achieve seamless operation; Numerical key, can change the set value as needed

Contact Us
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SR469-P5-HI-A20-E

Main features and advantages:
Excellent motor protection: SR469-P5-HI-A20-E provides a comprehensive set of protection functions. It can timely detect and respond to overload, short circuit, and phase imbalance issues, protecting the motor from serious damage. For example, in mining operations, if the motor driving the conveyor belt starts to overload due to the belt getting stuck, the relay can quickly cut off the power supply to prevent the motor from burning out. This not only reduces maintenance costs associated with motor replacement, but also minimizes production losses caused by unplanned shutdowns.
Improving energy efficiency: By accurately monitoring power consumption and power factor, this relay enables the industry to identify and correct inefficient energy usage patterns. In large manufacturing plants, if a group of motors is found to have a low power factor, relays can trigger the installation of power factor correction capacitors. This simple measure can bring significant energy savings in the long term, reduce electricity bills, and help achieve more sustainable operations.
User friendly configuration and monitoring: The enhanced front panel design of SR469-P5-HI-A20-E is a major advantage. The large LCD 40 character display combined with intuitive light-emitting diode (LED) indicator lights, numeric keypad, and control keys makes it extremely easy for operators to configure relay settings. They can easily view real-time data of the electric motor, such as current, voltage, and power factor. In addition, the communication interface of the relay (including optional Ethernet) allows for remote monitoring and control. The maintenance team can manage motor operations from the central control room, even if the motors are located in different areas of a large industrial complex. This remote functionality is particularly useful for industries with multiple sites or large-scale operations.

SR469-P5-HI-A20-E

Application areas:
Manufacturing factory: In the field of automotive manufacturing, SR469-P5-HI-A20-E can be used to protect and monitor the electric motors that drive robot arms, which are crucial for precise assembly tasks. Any electrical abnormalities in these motors may lead to inaccurate assembly, resulting in defective products. In food and beverage factories, this relay can protect the motors in packaging machines, ensuring consistent and efficient packaging processes. It can also protect the electric motors in the mixer and pump, maintaining the integrity of the production process.
Power generation and distribution: In power plants, this relay is crucial for protecting the electric motors in the cooling system. These electric motors are responsible for maintaining the optimal temperature of generators and other critical equipment. If the cooling system motor malfunctions due to electrical faults, it may cause overheating and potential damage to the generator and other power generation equipment. In the substation, SR469-P5-HI-A20-E can monitor and protect the motors used for switchgear operation and control, ensuring reliable power distribution.
Water and sewage treatment: Electric motors play a crucial role in water and sewage treatment plants, driving water pumps that transport water, aerators that add oxygen to water, and other necessary equipment. SR469-P5-HI-A20-E can be used to protect these motors from electrical faults. For example, in a sewage treatment plant, if the pump motor is overloaded due to pipeline blockage, the relay can detect the problem and take appropriate measures, such as shutting down the motor or triggering an alarm, to prevent damage and ensure the continuous treatment of sewage.

SR469-P5-HI-A20-E

Installation and maintenance:
Installation: Before installation, it is essential to verify that the power supply voltage and frequency accurately match the specifications of the relay. Current transformers and voltage transformers must be selected correctly based on the rated current and voltage of the motor. Relays should be installed in locations that are easily accessible for configuration and maintenance. Adequate ventilation should be provided to prevent overheating in high-temperature environments.
Configuration: Relay settings can be configured using a user-friendly front panel interface or provided software. This includes setting overload protection thresholds, alarm levels, and communication parameters. It may be necessary to calibrate the analog output to ensure accurate measurement and transmission of data. Proper network configuration, such as setting IP addresses and subnet masks, is crucial for seamless communication with other control devices when using optional Ethernet interfaces.
Maintenance: Relays should be visually inspected regularly to check for any signs of physical damage, such as cracks in the casing or discoloration of components. The connections of current transformers, voltage transformers, and communication cables should be checked for looseness or corrosion. It is recommended to regularly update the firmware to obtain the latest features, improve measurement accuracy, and enhance security. The diagnostic function of relays can be used to monitor their health status, such as checking the integrity of internal circuits and the normal functioning of sensors. Regular cleaning of relays to remove accumulated dust is crucial for maintaining their optimal performance in dusty environments.

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