Overview

Integrated Measurement Relay is an all-in-one solution to protect your transformers. It combines the functions typically performed by multiple accessories in a single compact and reliable device. It reduces the impact on the electrical network and the environment, thus making power more efficient and accessible.

The Integrated Measurement Relay (IMR) enables rapid action on hermetically sealed liquid-filled distribution and small power transformers. The operator will receive an alarm if the transformer’s pressure, temperature, oil level, or gassing increases/decreases from predetermined thresholds.

Oil level and gassing

IMR measures variation in transformer oil level or gassing.

● Slight oil level variation or any gas increase is displayed by thefloat position between “MIN” and “MAX”
● In the event of significant variation in oil level or gas, the floatstops at “MIN” and opens/closes the alarm contact
● Any accumulated gas can be drawn off by the bleed valveprovided

Temperature

IMR measures the internal temperature of the transformer.
● The operating temperature is set according to the transformermanufacturer’s instructions.
● Temperature variation is displayed on a thermometer equippedwith a zero-resetting pointer.
● In the event of a significant variation of preset value, twoalarms can be set based on the transformer manufacturer’sinstructions: T2 for Alarm and T1 for Tripping.

Pressure
IMR measures the internal pressure of the transformer.
● Measuring Range: 100 ÷ 500 mbar
● Operating pressure is set according to the transformermanufacturer instructions
● When the pressure exceeds the preset value, the alarm contactis triggered

Additional features
Easy installation
● Double insulation system, no need to make earthing connection
● Air venting valve for draining the moisture inside the terminalbox
● Withstand a DC magnetic field up to 25 mT
● No need for anti-magnetism shielding

Technology parameters