SR745-W3-P5-G5-HI-A-E | GE Multilin Transformer management relay

Description

The 745-W3-P5-G5-HI-A-E is a high-speed, draw-out transformer protection and management system manufactured by General Electric Multilin. Its windings each function on a phase current input rating and ground current input of 5A.

Operating Environment Humidity：up to 90% non-condensing

Tap Position Range：0 to 500 Ω or 0.5 to 5.0 kΩ

Software Version：EnerVista 745

Operating Temperature：-40°C (-40°F) to +60°C (140°F)

Ambient Storage Temperature：-40°C (-40°F) to +80°C (176°F)

Frequency：50 or 60 Hz nominal

Control Power Range：90 to 300 V DC; 70 to 265 V AC at 48 to 62 Hz

Analog Input Impedence：375 Ω ±10%

The 745-W3-P5-G5-HI-A-E is a high-speed, draw-out transformer protection and management system manufactured by General Electric Multilin. Part of the 745 series, this particular model is three winding and includes analog inputs/outputs and an enhanced LCD. Additionally, this model is the high control power version of the series. Its windings each function on a phase current input rating and ground current input of 5A.  The 745 employs metering technology, eliminating the need for extraneous equipment and connections to the transformer system. It is capable of monitoring and recording voltage, current, power, energy, temperature, and more. These values can be displayed on the enhanced LCD when not in direct use, or alternatively examined through GE’s industry standard EnerVista 745 program. The RS232 or RS422/RS485 ports can both be used to connect computers to the system, or users can purchase a different model that allows Ethernet setup and connection. These parts are demarcated by a “T” in the model number, and they can be found by searching our website or scanning through AX Control’s 745 series page.  GE Multilin’s 745-W3-P5-G5-HI-A-E reduces costs through its asset monitoring, determining hottest-spot temperature and aging factors to calculate when it is best to replace or perform maintenance on power transformers. Its adaptive capabilities also lower costs by reducing overall strain on the system and alerting users when problems occur within the transformer system.

summarize The MIF II is a member of the MII family of protective relays that function as primary loop protection in distribution networks of any voltage level, as well as backup/auxiliary protection for transformers, generators and motors. Protection features include time-delay overcurrent, instantaneous overcurrent (two stages) and thermal image protection. Depending on the model selected, the overcurrent element can be either three-phase and grounded, or single-phase. Optional protection features include cold load start, circuit breaker failure protection, circuit breaker condition, configurable logic, and automatic reclosing. Each protection element can be selectively enabled or deactivated through the front panel or communication. Flexible setup and optional ANSI, IEC, IAC or EPTAR-C curve models ensure proper fit with other devices. The standard configuration of the MIF II relay has 2 fixed digital inputs and 6 fixed digital outputs. As an alternative, 2 inputs and 4 outputs can be configured by the user. The standard MIF II has 6 fixed status LED indicators, or 4 of them can be configured by the user. The panel also has a 5-key keypad and a 16x2 LCD display, which are easy to use user interfaces. The user can use the keyboard on the panel to set the communication baud rate and relay address. The relay is configured with a front RS232 communication port and a rear RS485 communication port to which the computer connects and accesses the relay via the ModBus®RTU protocol. By using an external converter, such as GE Multilin DAC300 or F485, the rear RS485 port can be converted to an RS232 port or a fiber optic port (plastic or glass fiber). Windows® based EnerVista software for setting up and configuring MIF relays is included free of charge. The MIF II relay is accessed from a computer using the MII EnerVista Setup software through the RS232 communication port located on the relay panel. Use EnerVista software to view or modify relay setting values and configure relays (input, output, LEDS and configurable logic), as well as display measurement information and real-time status of relays. If the relay is equipped with the appropriate options, EnerVista software can be used to display the latest fault information, such as incident reports and wave logging. The MIF has a drawout structure and is housed in a 1/4 19 "chassis.

Major advantage Excellent cost performance depending on the actual configuration - event reporting, waveform capture, reclosing, circuit breaker failure Reduce troubleshooting time and maintenance costs - event reporting, waveform capture Design flexibility - easy to use programmable logic Critical equipment monitoring - circuit breaker operating conditions and circuit breaker failure protection Information Access -Modbus RTU communication Configurable logic, curves, I/O and LEDS Flash technology for field upgrades Two sets of fixed values Password protection for on-site operation The latest fault information is automatically displayed AC/DC power supply Improved user interface Access via the keyboard or communication link on the front panel Compatible with EnerVista Isolated RS232 serial port on front panel use Main loop protection for any voltage level distribution network Transformer, generator and motor backup/auxiliary protection peculiarity Protection and control Phase and ground delay overcurrent and instantaneous overcurrent Thermal image protection "N" option for single-phase or grounded applications IAC time-current curve EPTAR-C Time-current curve Circuit breaker control Four times automatic reclosing Cooling load action element Configurable circuit breaker failure function Configurable I/O 6 outputs: for tripping, required operations, 4 assists

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