1. Portable Working Standard
PWS 2.3 PLUS
Portable Working Standard

2. Advantages / Benefits U, I, P, Q, S, , cos, f, ... measurements
Vector diagram
Burden measurements
Ratio test of C.T.´s and P.T´s
U, I, P, Q, S, , cos, f, ... measurements
Print functions
Meter error measurements
Memory functions
Harmonics measurement

3. Advantages / Benefits Robust rubber protected housing
Supply from measurement circuits or auxiliary supply
Data memory for test results and customer data
Wide measuring range with auto ranging
Automatic clamp detection
Small dimensions and light in weight
Advantages / Benefits

4. Reduction of annual losses caused by circuit & wiring problems  faulty wirings are at the expense of the supplier / utility
Service-orientated handling of customer complaints with presence and consultation
Short reaction time on customer complaints
Reduced expenses of complaints (fast and on-site)
Putting-into-operation tests to eliminate faulty wirings
Periodical tests after changes in wiring to ensure a correct performance of the installation
Sampling tests of contractors for metering
Why to use

5. Energy utilities / suppliers in metering and service departments
Contractors in metering and transformer sector
Metrological laboratories and institutes
Industry with large number of meters and measuring transformers (airports, exhibitions areas, …)
Manufacturers of meters
Where to use

6. Technical data Basic Characteristics 20 mV ... 300 V (phase-neutral)
1 mA A direct connection
1 mA A via clamp-on CTs
Measurements of all electrical parameters (incl. vector diagram)
CT / PT testing (burden, ratio)
Accuracy  0.1 %,  0.2 %
Options:
CALSOFT I Software
Clamp-on CTs for 1000A  LEMflex© up to 3000A  LiteWire Sensors up to 2000 A and 40 kV

7. Connections Top view
[1] Current outputs I1*, I2*, I3* [5] Connection for clip-on CT’s
[2] Current inputs I1, I2, I3 [6] Impulse output
[3] Voltages connection U1, U2, U3 [7] Impulse input
[4] Neutral connection for voltage N

8. Connections Bottom view
[8] Serial Interface RS 232 C
[9] Sockets for supply from [10] Auxiliary supply connector measurement circuits

9. Optional current clamps to the PWS 2.3 PLUS
Error compensated clamp-on CT’s for measurements in the range up to 100 A
Clamp-on CT’s for measurements in the range up to 1000 A
Flexible current transformers LEMflex for measurements up to 30 / 300 / 3000 A
Hot sticks for measurement on high voltage potential - AmpLiteWire up to 2000 A - VoltLiteWire up to 40 kV

10. Operation Concept
Display Symbols Control Keys   

11. Software
Status Indications

12. Software Main Menu Meter Test / Error Measurement
Measurement, Harmonics,
Oscilloscope, Vector Analysis, Circuit testing
Transformer Test, Burden & Ratio
Energy Measurement, Dial Test
Installation (Setup)

13. Software
Error Measurement

14. Software
Measurement of load values UI, power values PQS and display of vector diagram

15. Software
Harmonic Analysis and Waveform display

16. Software
Energy measurement, test of the energy register error and maximum demand

17. Software
Burden measurement of voltage and current transformer

18. Software
Current transformer ratio measurement

19. Software
Administrative data set (ADS)

20. Software
Examples of test results

21. Software
Example of printouts

22. Windows©-Software CALSOFT Selection of real time readout or
readout of sets of data from PWS 2.3 PLUS memory