The GE Multilin 745-W2-P1-G1-HI-T-H Transformer Protection Relay features transformer overload protection and overexcitation protection to ensure smooth transformer operation.

It also monitors, records and displays trends in system variables such as temperature, voltage, power, energy consumption and dcs-sis.com rate of change of frequency.

Product Description

The 745-W2-P1-G1-HI-T-H is a GE Multilin transformer protection relay that extends transformer life expectancy and optimizes transformer performance.

It protects and manages small, medium and large transformer systems. Part of the 745 Series, the 745-W2-P1-G1-HI-T-H features transformer overload protection and overexcitation protection to keep transformers running smoothly.

It also monitors, records and trends system variables such as temperature, voltage, power, energy consumption and frequency rate of change.

These values can be quickly referenced through the relay’s software program, Enervista 745.

The Enervista 745 software program can also be used to edit setpoints. Utilizing GE Multilin’s quick connect feature, the

Connecting the relay to a computer is simple with the GE Multilin Quick Connect feature. The connection can be established via Ethernet, the RS232 port on the front, or the RS485/RS422 port on the back of the panel.

The program assists in managing system setup and automatically flags programming errors or conflicts as the user adjusts setpoints.

The 745-W2-P1-G1-HI-T-H’s enhanced 40-character display is larger than the base model and includes an extended keypad for easy manual setpoint entry.

The enclosure is 9″ high by 7″ wide by 7 ⅛” deep. The transformer protection system can be mounted on a standard 19″ panel, but care should be taken that the enclosure door opens and closes freely without contact with other components.

A number of LEDs on the front of the chassis alert the user to various statuses and errors in real time.

Frequently Asked Questions about the 745-W2-P1-G1-HI-T-H

What makes the Multilin 745-W2-P1-G1-Hi-T-H unique compared to other transformer protection relays in the 745 series?

The 745-W2-P1-G1-Hi-T-H Multilin transformer protection series contains unique options that differ from other part numbers.

Notably, the “-H” option indicates that the relay has a harsh chemical environment conformal coating for operation in harsh environments.

The T option in the 745-W2-P1-G1-Hi-T-H Multilin Dual Winding Transformer Management Relay differs from other relays in the 745 system in terms of display and Ethernet.

Transformer protection systems without the T option have either a basic display (B) or an enhanced display (E) with a larger LCD.

The T option comes with an enhanced display, larger LCD, and 10Base-T Ethernet.

The Multilin™ 489 Generator Protection System is a member of the SR Series of relays that provides protection, control, and advanced communications in an industry-leading drawout configuration.

Designed for small to medium sized generators, the 489 offers advanced protection features, including generator stator differential protection. 489 also includes detailed diagnostic information to reduce troubleshooting time.

Key Benefits

– Comprehensive, safe protection for small and medium-sized generators

– Easy-to-use generator protection system supported by an industry-leading suite of software tools.

– Advanced protection and monitoring features, including stator and bearing thermal protection using RTDs and vibration monitoring using analogue inputs

– Globally recognised as a member of the most prestigious relay protection product family on the market

– Drawer construction to minimise downtime and facilitate removal/installation during routine maintenance 489

– Large, user-friendly front panel interface for real-time power monitoring and setpoint access, with a display that is easy to read in direct sunlight

– Enhanced generator troubleshooting capabilities through the use of IRIG-B time-synchronised event logging, waveform capture and data logger

– Simplifies setpoint verification testing with built-in waveform simulation capabilities

– Cost-effective access to information through industry-standard communications hardware (RS232. RS485. 10BaseT Ethernet) and protocols (Modbus RTU, Modbus TCP/IP, DNP 3.0)

– Can be used in most extreme locations by offering harsh chemical environment options

Applications

– Synchronous or induction generators operating at 25Hz, 50Hz or 60Hz

– Primary or backup protection in cogeneration applications

Protection and control

The 489 generator protection system provides comprehensive protection, metering and monitoring functions,

The 489 generator protection system provides comprehensive protection, metering and monitoring functions for small and medium-sized synchronous or induction generators operating at 25. 50 or 60 Hz.

The 489 is ideal for primary or standby generator protection as well as cogeneration applications.

The 489’s protection features include:

Generator stator differential

The 489 uses high speed dual slope differential protection to detect and clear stator phase faults.

Stator phase faults. Advanced CT saturation detection algorithms provide additional supervision through the use of directional checks that

ensures that the fault occurs inside the generator before triggering a trip, thus maintaining immunity to saturation that may be caused by external disturbances.

100% Stator Ground

100% stator ground fault protection is provided by an overvoltage element and an adaptive differential voltage function that responds to third harmonic imbalances at the machine terminals and neutral.

The SR469-P5-LO-A20-T has a 5 amp current transformer secondary coil mounted on the base unit.

It is a low control power unit rated for 24-60 volts DC or 20-48 volts AC @ 48-62 Hz.

Although the unit has an optional Ethernet port, it does not include the optional DeviceNet or enhanced front panel.

Product Description

The SR469-P5-LO-A20-T is an SR469 multi-wire relay designed to provide comprehensive protection for medium to large motors. The unit offers many management features.

The SR469-P5-LO-A20-T has a 5 amp current transformer secondary coil mounted on the base unit.

It is a low control power unit rated for 24-60 volts DC or 20-48 volts AC @ 48-62 Hz.

Although the unit has an optional Ethernet port, it does not include the optional DeviceNet or enhanced front panel.

In addition, it is not designed for harsh environments as it does not include a chemically conformal coating.

The SR469-P5-LO-A20-T includes an optional Ethernet 10BaseT Ethernet port.

With this additional port, users can connect their 469 units to 10 Mbps Ethernet.

This port brings the number of ports in the unit to four, including the three standard serial ports that are always displayed in the SR469 relay.

All SR469 relays have two RS485 ports on the real panel. In addition, there is an RS232 port on the bottom of the front panel.

This port provides quick access for troubleshooting and programming.The SR469-P5-LO-A20-T supports ModBus RTU and ModBus RTU via TCP/IP.

The GE Multilin manual will provide the user with additional information on installation, safety and proper operation.

Original documentation such as manuals and user guides should be read and understood before opening the box; this will ensure that you are aware of all possible hazards and ensure your safety.

Frequently Asked Questions about the SR469-P5-LO-A20-T

What are the standard features of the SR469-P5-LO-A20-T General Electric Motor Management Relay?

All 469 Motor Management Relay features are standard. Although the analogue output range, phase current transformer secondary and control power must be specified prior to purchase, the

to ensure that the correct standard features are purchased for the relay. Some features are programmable, such as the 469 relay’s differential current transformer input with a 1A or 5A secondary current transformer.