Substation Automation - Transducer


Transducers convert AC voltage or current into a standard output signal. An AC transducer measures a wide range of input current and voltage and has DC analog outputs, digital outputs, and light-emitting diodes (LEDs) to indicate the status. Transducers do not have self-contained displays and the inclusion of communication ports is optional. Transducers have two types of standard DC outputs: DC analog voltage outputs (such as 0 V to 10 V) and DC analog current outputs (such as 4 mA to 20 mA).

Power transducers that include AC voltage and current measurements are required to measure power and energy in both directions. The direction of energy is indicated by the current direction when the transducers are configured for this application and the bidirectional DC output indicates the amplitude and direction of the current being measured.

TI Reference designs and semiconductors help:

  • Provide for use in transducers, a wide portfolio of precision 12- to 16-bit digital-to-analog converters (DACs). The number of bits can be selected based on transducer accuracy specification.
  • Showcase digital isolators for isolating the transducer output connecting to the data acquisition system as per the common industry practice.
  • Provide single-chip solutions that simplify the process of driving relays as it requires a discrete bipolar junction transistor (BJT) or metal-oxide semiconductor field-effect transistor (MOSFET) along with a free-wheeling diode for inductive kickback protection.

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