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Description
SR745-W3-P5-G5-LO-A transformer management relay
Product Description
The GE SR745-W3-P5-G5-LO-A is a transformer management relay manufactured by GE Multilin for the protection and management of power transformers of all sizes. Here are some of the key features and functions of the product:
Applicability: Suitable for small, medium and large power transformers, including two – and three-winding transformers, as well as transformers with circuit breakers and half-source terminals 9496.
Protection function: Provides the main protection and backup protection including differential protection, ground differential phase, neutral and ground overcurrent, overflux and on-load tap-changer protection.
Advanced features: A harmonic level detector that calculates the total harmonic distortion (THD) or harmonic derating factor for each winding and compares it to a user adjustable setpoint 94.
Asset monitoring: The ability to monitor, calculate and record hot spot temperatures, aging factors and long lost life data, combined with economic analysis, helps determine the best time to replace a power transformer.
Event logging: The ability to capture and store the last 128 events, recording the time, date, cause and system parameters of each event, which can be easily accessed through the communication port or the front panel display 94.
Analog mode: Allows to test the functionality of the relay by feeding arbitrary waveform data into the analog buffer of the relay and then playing it back as a sampled current input signal 94.
Communication interface: Equipped with standard serial communication ports, including RS232 on the front panel and two RS485/RS422 ports on the rear of the relay, Ethernet ports are optional and support ModBus RTU, DNP3.0 Level 2 and ModBus RTU TCP/IP protocol 9497.
User interface: Includes a 40-character display that allows access to set points, actual values, and diagnostic information generated by trip or alarm conditions, as well as 20 LED indicators showing relay status, system status, and trip and alarm conditions.94
Software support: The EnerVista™ software suite simplifies all aspects of using 745 relays, including monitoring transformer status, maintaining relays, and integrating information from 745 measurements into DCS or SCADA monitoring systems.
Environmental adaptability: Optional conformal coating for chemical corrosion and humid environments 94.
Applications: Power transformers, distribution transformers for industrial and commercial facilities, and transformers for wind and solar power applications.
SR750-P5-G5-S5-HI-A20-R-T
Product parameter
The parameters of the GE SR745-W3-P5-G5-LO-A transformer management relay are as follows:
Rated voltage: 5kV to 69kV
Rated current: 100A to 5000A
Protection function:
overcurrent
overvoltage
Differential protection
Zero sequence harmonic protection
Excitation inrush current protection
Buchholz relay protection
Temperature protection
Communication interface: RS232, RS485, Ethernet
Dimensions: 19 “rack mount
Relay type: microprocessor relay
Accuracy: 0.5%
Response time: Less than 20 ms
Setting range: adjustable
Control power supply: 90 to 300 VDC; 70 to 265 VAC at 48 to 62 Hz
Analog input/output: Includes analog input/output, as well as transformer life loss and limited ground fault options
User interface:
A 40-character backlit LCD display and input keyboard allow users to manually adjust set points
20 LED indicators show the various states of the system during routine functions
The IRIG-B input provides time synchronization input via a standard GPS clock
Advanced metering features:
All current inputs have harmonic level detectors
The sampling rate is 64 times the power cycle, allowing recovery to the 21st harmonic
The total harmonic distortion (THD) or harmonic derating factor for each winding is calculated and compared to a user-adjustable set point
Event logs: Capture and store the last 128 events, recording the time, date, cause, and system parameters of each event
Fault logging: The system input signal is sampled at 64 times the rate of the power cycle, and a combination of 16 pre-trigger and post-trigger cycles can be saved
Logical input: Sixteen logical inputs are provided
Application field
Small and medium-sized power transformers: Provide comprehensive protection and management for small and medium-sized power transformers.
Industrial and commercial facilities: Used for the protection and monitoring of distribution transformers in industrial and commercial facilities.
Wind and solar power applications: In the field of renewable energy, protection of transformers for wind turbines and solar power systems.
Power systems: Applicable to transformers in power systems, including power stations, substations and transmission lines.
Automated control systems: Integrated with automated control systems (such as DCS or SCADA) to provide remote monitoring and control functions.
Energy management: In the field of energy management, it is used to optimize the operation and maintenance of transformers, reduce energy consumption and extend the life of equipment.
Protection and control: Provide transformer differential protection, overcurrent protection, overvoltage protection, etc., to ensure the safe operation of the transformer.
Fault analysis: The event and fault recording functions help analyze the causes of transformer faults and improve fault handling efficiency.
Harmonic analysis: Monitor and analyze the harmonic level of the transformer, evaluate the impact of harmonics on the transformer, and ensure the stable operation of the system.
Asset Monitoring and management: Help develop transformer maintenance and replacement plans by monitoring transformer hot spot temperatures, aging factors and life loss.
Simulation and testing: Through the simulation mode, you can test the function of the relay and verify the correctness of the protection Settings.
Environmental adaptability: Dustproof and moisture-proof, suitable for harsh environmental conditions.
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