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Manufacturers of Process
Controls and Instrumentation
Function:
The IUC-7X-WTX is a new & improved model of its prior
version.
It uses a microprocessor to compute
instantaneous voltage and current values which it then
uses to produce one of four different outputs. These
are: 1) Watt, 2) VA, 3) VAR and 4) Power Factor.
An optional Watt Hour counter output is also available to
count watt hours consumed. The IUC-7X-WTX comes
in single (-WT1) or double (-WT2) element versions for
1, 2 or 3 phase systems.
Watts = V
x I
Instantaneous
Instantaneous
VA = V
x I
RMS
RMS
2
2
VAR = VA - Watt
Watts
Power Factor =
VA
Model: IUC-7X-WTX
Isolated Watts Transducer
Standard Features:
Selectable Output for Watt, VA, VAR or Power Factor
High Input-Output-Power Isolation (1500VAC Test)
Single or Double Element for 1 and 3 Phase Circuits
Industry Standard Output: 4-20 mA, 1-5 VDC, more
Optional Watt Hour Counter & Watt Display
Microprocessor Controlled for High Accuracy even
with Distorted Waveforms (SCR switching etc.)
Less than 1VA Burden on Voltage and Current Coils
0-5 AAC Current, 0-150 VAC Voltage Input
Standard Calibrations: 500 Watts (WT1),
Easy Field Adjustable Output Calibration
Power: 117 VAC 50/60 Hz
R
High Noise Rejection
CSA and NRTL Approved (LR 51078)
NRTL/C
Calibration:
No calibration is required on these watts transducers.
There is a zero and span adjustment for the output
signal for output calibration. Standard calibrations are
for 500 Watts (WT1) and 1000 Watts (WT2).
Specifications:
Isolation: Input to Output to Power 1500 VAC (test)
Maximum Coil Ratings: Current: 15A Continuous
Accuracy/Linearity:+/- 0.4% max., +/- 0.2% typ.
Operating Temperature: -40 Deg.C. to +50 Deg.C.
Temperature Effects: +/-0.5% max., +/-0.2% typ.
1000 Watts (WT2)
100A 3 sec/Hr.
Voltage: 150% of Rated Voltage
(for 40 Deg.C. change)
Page A22
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