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Tree Tech IT
Series Signal Conditioners
The Insulated Transducer (IT) is used in monitoring and
protection systems for power transformers and reactors. Its function
is to convert analog signals from temperature sensors (RTD),
position of taps (potentiometric rings of on-lap tap changers), or
current loop (signals in mA) into output values proportional to the
input values. In the case of a RTD input, the IT performs the
linearization of the sensor curve to obtain increased accuracy.
The IT was designed with a universal power input (85 to 265 Vdc/Vac,
50/60 Hz), in order to comply with all types of power supply
commonly used in auxiliary systems of substations.
It is provided with galvanic insulation between the input, output,
and power supply circuits. In addition to the current loop output,
the IT has also a N.O. contact to signal any input sensor loss of
signal. Two LED’s provide local visualization. A green light to
signal a transducer on, and a red light to signal an alarm contact
actuation due to a sensor loss.
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