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Potential Transformer | Selecting and Using Transducers Series: For the Measurement of Electric, Power, Voltage, and Current

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June 2, 2016

Most manufacturers' transducers accept up to a maximum of 600 AC (accelerated current) volts direct. For AC voltages greater than 600 volts, potential transformers are required.

What is a potential transformer? A precision transformer that steps the voltage down to 120 volts AC, a standard transducer input. These transformers, particularly when used with power or watt transducers, must be instrument grade transformers. They must be precise at stepping down the voltage and at maintaining the phase or time relationship of the voltage. Important: Do not attempt to save money by using control class transformers.

Transducer and meter loads are connected in parallel to the potential transformer. Take care not to exceed the transformer burden rating. This burden is expressed in VA for volt-amperes (the product of volts and amps). Typical voltage and watt transducers require <2.5VA per phase.

 Open-Delta design for use On 3 phase 3 wire system.

Open-Delta design for use On 3 phase 3 wire system.

Single phase design for use in Single or poly-phase system.

Single phase design for use in Single or poly-phase system.


Interested in reading the entire Selecting and Using Transducers for the Measurement of Electric, Power, Voltage, and Current document? (Click here)



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