TI – Insulated Transducer
The Insulated Transducer (TI) is used inmonitoring and protection systems for power transformers and reactors. Its function is to convert analog signals from temperature sensors (RTD), position of taps (potentiometric transmitters 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 TI performs the linearization of the sensor curve to obtain increased accuracy.
The TI 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 TI has also a N.O. contact to signal any loss of input sensor signal (for temperature and tap position versions only).
Two LED’s provide local signals.A green light to signal transducer on, and a red light to signal an alarm contact actuation due to a sensor loss.