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ConLAB WVT-3 Operator's Manual

Watt-var transducer
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Table of Contents

WVT-3
Watt-Var Transducer
Operator's Manual
Contents:
1.

Calibration Instructions

2.

Connection Diagrams

3.
4.
1.
CALIBRATION INSTRUCTIONS
The WVT-3 is a precision instrument and was carefully and
accurately calibrated.
Please do not change the internal potentiometers' setting.
In order to change slightly the calibration setting, please use
the external Zero & Span potentiometers on the unit's panel
Please connect the unit to the calibrator according to the
following:
For single-phase unit, the calibrator calculated power (CP)
is: CP = Pmax
For Three-phase unit, the calibrator calculated power (CP)
is: CP = Pmax/2
1
Please follow the following instructions:
a. Set the calibrator to the desired maximum input voltage.
Set the output calculated power (CP) .
Set Power Factor (P.F) = 1.0
b. With no power delivered to the WVT-3 unit, set the Watt
and Var potentiometers for 4mA reading in both current
meters.
c. Turn on the calibrator for full power. Tune the Watt's
Span potentiometer to 20.000mA.
d. Set the P.F = 0 and tune the Var's Span potentiometer to
20.000mA.
2.
CONNECTION DIAGRAMS
The power transducer is phase sensitive. Please keep the
voltage/current phases according to the following diagrams.
Three-Phase Connection
Single Phase Connection

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Summary of Contents for ConLAB WVT-3

  • Page 1 Set the calibrator to the desired maximum input voltage. Operator’s Manual Set the output calculated power (CP) . Set Power Factor (P.F) = 1.0 b. With no power delivered to the WVT-3 unit, set the Watt Contents: and Var potentiometers for 4mA reading in both current meters.
  • Page 2 INPUTS Connection: 1 or 3 phase, 3 wire, unrestricted WVT-3 POWER FACTOR: Unity - to lead or lag zero Operator’s Manual POWER CALIBRATION SPAN: 170 to 8500 Watt/Var OVER RANGE: +42% (at full accuracy) DIMENSIONS (mm) CURRENT CURRENT RANGES: 0 - 1 to 0 - 5 Aac RMS CURRENT OVER RANGE: +20% (at full accuracy) PEAK OVERLOAD: 40 Aac RMS, for 5 sec.

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