Foxtam combined active and reactive power (Watts & VAr) transducers can measure directly or via inputs from current transformers and/or voltage transformers. All combined active and reactive power transducers require a separate auxiliary supply. At the time of ordering the input details especially CT and VT input ratio details must be specified. Any specific scale range can also be determined, otherwise sensible scale ranges from the input details supplied will be calculated. The 4KV isolated output signals are suitable for many applications, such as inputs to analogue and digital meters, PLC’s or BMS systems.
Transducer types include:-
FOX.TR.W.VAR.12 – Single phase, requiring a single current and voltage input.
FOX.TR.W.VAR.33B – Three phase, three wire balanced load, requiring current inputs from L1 & L3 and voltage inputs from L1 & L3. On request the unit can be configured current input L1 only and voltage inputs L1, L2 & L3.
FOX.TR.W.VAR.33U – Three phase, three wire unbalanced load, requiring current inputs from L1 & L2 and voltage inputs from L1, L2 & L3. On request the current input can be from L1 & L3.
FOX.TR.W.VAR.34B – Three phase, four wire balanced load, requiring a single current input from L1 and a voltage input from L1 along with the Neutral.
Any of the above transducers can be supplied as bi-directional (import / export) with a +/- analogue output or a 4-12-20mA output.
Accuracy: Class 0.25
VT ratio specify
CT ratio specify 1A or 5A
1.2 x Un & 2 x In continuous
1.5 x Un & 30 x In for 1 sec
Working range: 0-120%
Frequency: 50Hz or 60Hz
<0.2VA voltage input
<0.3VA current input
FOX.TR.VAR.12-Single phase: 2
FOX.TR.VAR.33B-3P3W Balanced: 2
Special configuration detailed in description tab: 3
FOX.TR.VAR.33U-3P3W Unbalanced: 3
FOX.TR.VAR.34B-3P4W Balanced: 2
FOX.TR.VAR.34U-3P4W Unbalanced: 3
FOX.TR.W.VAR.12 / Single phase
FOX.TR.W.VAR.33B / 3P3W balanced
FOX.TR.W.VAR.33U / 3P3W unbalanced
FOX.TR.W.VAR.34B / 3P4W balanced
*Specify exact direct input ranges required and/or CT & VT ratios
**For bi-directional active power transducers (import / export versions), also +/- output signals can be specified for example -10VDC to 0 to +10VDC
***Subject to technical viability it is possible to have a different output for both active and reactive power
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