3-PHASE TRANSDUCER TEST UNIT
TYPE PG400



The Convex Design PG400 is a precision 3-phase electronic power supply and power measuring system, intended for testing and calibrating 3-phase, 3-wire real power (Watt) and reactive power (Var) transducers. It may also be used for injecting known quantities of power into any 3-phase, 3-wire network. The unit is powered from a single phase supply (110 or 240V) and generates the necessary voltage and current outputs required for testing 2-element transducers. An internal Wattmeter displays the injected power or reactive power on a digital meter. The unit is transportable and may be used for testing transducers in-situ.

The test unit generates two voltage outputs (0-120V) and two current outputs (0-1A). The first voltage output (VRY) is the reference output and the phase angles of the remaining voltage and currents are referred to this output. The output level of each voltage or current channel may be adjusted from zero to full scale using a multiturn potentiometer and the magnitude of each channel output is displayed on a digital panel meter (one per channel). The phase angle of each voltage or current channel relative to the reference channel is adjustable over the range ±199° using a thumbwheel switch. In addition a ±1° continuously variable phase shift control is provided for each channel.

The voltage and current outputs are low distortion sine waves (better than 0.2% total harmonic distortion) with a rated output of 35VA per channel for the voltage channels and 15VA for the current channels. The current outputs are of constant current form and are protected against open-circuit operation. The output frequency of 50Hz is crystal-controlled. The apparent injected power is displayed on a digital panel meter which can be switched to display either real or reactive power.

A third current output derived from the two main current outputs is also provided. This is intended primarily for testing reactive power transducers.


SPECIFICATION

INPUTS
Power Supply:                      110V or 240V 50Hz switchable.
OUTPUTS
Voltage Channels:                 0-120Vrms, output power 35VA. 
                                            Regulation less than 1% at 35VA.
Current Channels:                  0-1A, 15VA.  Constant current output.
Output Frequency:                50Hz crystal-controlled.
Sine Wave Distortion:             Less than 0.2% total harmonic distortion
                                            on voltage or current ranges at rated output.
Phase Shift:                           -199° to +199° in 1° steps between any channel
                                            and the reference channel.   Continuously variable
                                            trimmer gives ±1.5° adjustment.
DIGITAL VOLTMETERS 
Display:                                 digit LED 14mm numeral height, one decimal place. 
Accuracy:                              ±0.5V.
DIGITAL AMMETERS
Display:                                 digit LED 14mm numeral height.
Accuracy:                             ±0.005A.
TWO ELEMENT WATTMETER
Display:                                digit LED 14mm numeral height, one decimal place.
Accuracy:                             ±0.2% of full scale.
ENCLOSURE                        A two-tone grey metal case with side-panel recessed handles. 
                                           Supplied complete with manual and leads.
Dimensions:                         W: 520mm  H: 345mm  D: 445mm.
Weight:                                27kg. 

CONVEX DESIGN LIMITED
 
email:sales@convexdesign.co.uk
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