489-P1-HI-A1-E transformer protection system
The 489-P1-HI-A1-E is part of the General Electric 745 transformer protection System family. This family is designed to provide high-speed transformer management relays that are built with multiprocessors and can provide two or three winding transformer management. This series of units can be used for the management and protection of power transformers of various sizes.
The 489-P1-HI-A1-E and other units in the family offer overexcitation protection elements with overcurrent and percentage differential capabilities, and are capable of monitoring individual harmonics as well as THD (total harmonic distortion).
745-W2-P5-G5-HI-AR is a basic unit with two windings per phase. The unit provides 5A for each winding and 5A for each ½ and <s:1> winding. The 745-W2-P5-G5-HI-AR is rated for 90 to 300 VDC, 70 to 265 VAC @ 48-62 Hz control power, and has analog inputs and outputs.
The unit is designed in a standard SR series arrangement (pull-out relay and supporting housing). It can be installed alone or used next to other SR series units mounted on a standard rack panel. The wiring diagram is provided in the original documentation, although this covers the standard wiring layout and may not cover all situations, including yours.
The front panel of the 745-W2-P5-G5-HI-AR includes a 40-character LCD display, multiple status indicators, control keys and a keyboard, as well as an RS232 interface programming port. This port will allow you to connect your computer to complete the setup using the EnerVista setup software.
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