Source: Barrington Consultants Inc.

Barrington Consultants, Inc. i introducing a new olid state transformer temperature monitor
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Barrington Consultants, Inc. is introducing a new solid state transformer temperature monitor that is SCADA ready and monitors both oil and winding temperatures. Due to the lack of moving parts, the TTM will not mechanically malfunction.

The TTM is designed for easy installation on single or three phase single tank transformers.

Local indication includes calculated winding temperature, peak winding temperature, top oil temperature, and peak top oil temperature with manual reset. Displays are .39" backlit LCD's that continuously display all four temperatures simultaneously. Communications include SCADA ready outputs, dry contacts for local annunciation, and a RS232/485 port.

The unit features two new user options AC/EC & Cooling Monitors. AC/EC is an ambient compensation/energy conservation feature that will compensate for hot and cold periods by starting or stopping fans at any programmable setback temperature. The TTM can effectively be used to automatically manual the cooling system during hot spells. The fan/cooling monitor "learns" the current required to run each of two stages of cooling. An alarm may then be set for any reduced percentage of cooling current.

The TTM is housed in an 8" X 10" X 6" NEMA 4 windowed enclosure. The enclosure is designed to be mounted on an existing transformer control cabinet. Ambient operating temperature range is -40 degrees C to 85 degrees C. Winding and oil temperatures are both obtained using a single RTD probe and one or three built-in current transducers.

Power requirements are 120 or 230VAC. Installation requires connecting one or three supplied clamp on CT's to existing secondary current circuits. The analog outputs can be connected to an existing SCADA system. The analog outputs supplied are 0 - 5 volts dc, 4-20ma or 0-1ma "switchable" representing -40 to 180 degrees centigrade for oil and winding temperatures. The TTM is surge tested to IEEE/ANSI C37.90 specifications for protective relaying applications.

<%=company%>, 2239 Valdes Court, Santa Rosa, California 95403 Phone: 707-527-8254 Fax: 707-542-9730