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P Series Variable
Frequency Input Single phase and Three Phase Active Power kW transducer |
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The P series
Watt Transducers are
designed to measure Active Power in 1 phase and 3 phase systems. They
convert the Active Power taken by a load to an isolated DC output directly
proportional to the input power in Watts or KW. The P Series
measure true power and are effectively RMS
calibrated transducers, with 4-20mA (4mA live zero) or voltage
(0-10V) outputs. Auxiliary instrument power is required to ensure that
the Watts computations are valid, even when the input voltage is varying. Because the
P Series is true
RMS sensing, its computation of AC Power is valid even with distorted waveforms
of up to 9th harmonic with a crest factor of 5. The P Series is typically
used for Power measurement where distorted current waveforms are present,
such as speed controlled pumps, motor controllers, UPS and thyristor drives. The above
units are also used to verify energy management systems,
switchboards, generator and telemetery controls. Isolation of 2.5kV is
provided between the input and output signal, allowing the P Series output to be
safely connected to PLC computer systems and even conventional analogue meters
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