Foxtam AC voltage transducers can measure voltage either directly (max 600VAC) or via the secondary of a voltage transformer. The transducer converts the AC input voltage to an isolated analogue DC mA or DC voltage signal output, directly proportional to the input. The 4KV isolated output signals can be utilised for many applications and can be fed into analogue meters, digital meters, PLC’s or BMS systems.
Transducer types include:-
Self powered - The lower cost option where no auxiliary supply is required but at least 10% of the input range is required to start generating an accurate output. Self powered units can only give a zero based output, hence a 4-20mA output is not possible. Self powered units also have an enhanced burden on the input (circa 3VA).
Powered – An auxiliary supply is required, these transducers can be used accurately down to 0% of the input range. A wide choice of outputs are possible including 4-20mA.
Powered TRMS – As per the standard powered transducer but with enhanced measuring technology, typically used for the accurate measurement of distorted waveforms. TRMS versions are also suited for use on high frequency circuits between 40 to 500Hz.
Accuracy: Class 0.25
VT ratio specify
1.2 x Un continuous
1.5 x Un for 1 sec
0-120% Un (powered units)
10-120% Un (self powered units)
50Hz or 60Hz
40-500Hz (TRMS units)
<0.2VA (powered units)
<3VA (self powered units)
Case size: 1
FOX.TR.AU / Self powered
FOX.TR.AU / Powered
FOX.TR.AU / Powered TRMS
Suppressed zero input***
*Specify exact direct input range required, recommended standard ranges 0-150V, 0-300V, 0-500V
**Not possible on self powered units
***Suppressed zero and expandable input versions are possible on powered units ie, a +/- % deviation around a nominal point 184-230-276V giving for example say 0-5-10VDC or 4-12-20mA output. Consult office for advice.
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