Transformer Protection Relay TR-7551 / TR-7552

Salient features :

• Displays both Oil & Winding temperatures simultaneously.
• Sensors : For oil temp - RTD Pt-100, IEC-60751.

For winding simulation - C.T.

• Winding temperature algorithm as per IEC/IEEE standard.
• Temperature indication range :

                 Oil : – 40 to 150 °C

                 Winding : – 40 to 200 °C.

• Anticipatory Fan & Fan exerciser function.
• Test function to simulate operation of OTI & WTI.
• Five relay outputs (Refer terminal details given below).
• Enclosure : Weatherproof Aluminum die cast (IP-65), with polycarbonate viewing window.
• Aux. Supply : 85-270 VAC/DC ( Optionally 20-50 VAC/DC ).