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Copyright HT ITALIA 2014

Version EN 2.01 - 26/05/2014

PQA819 – PQA820

User manual

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Summary of Contents for PQA819

Page 1: ...Copyright HT ITALIA 2014 Version EN 2 01 26 05 2014 PQA819 PQA820 User manual...

Page 2: ...7 Setting a programmed start and stop 12 5 8 Setting the instrument s date and time 12 6 MEASURING PROCEDURES 13 6 1 Connection in a single phase system 13 6 2 Connection in a three phase 3 wire syste...

Page 3: ...esence of harmonics 24 12 2 3 Consequence of the presence of harmonics 25 12 3 Definitions of power and power factor 26 12 3 1 Conventions on powers and power factors 27 12 4 Information on the measur...

Page 4: ...creen etc In this manual and on the instrument the following symbols are used Warning observe the instructions given in this manual improper use could damage the instrument or its components High volt...

Page 5: ...reads OMISSIS Circuits are divided into the following measurement categories Measurement category IV is for measurements performed at the source of the low voltage installation Examples are electrici...

Page 6: ...P 15min 30 IP 10min Table 1 Differences between model PQA819 and PQA820 2 2 INSTRUMENT FUNCTIONS The instrument allows performing the following functions A real time display with connection to PC and...

Page 7: ...follow the instructions given in 13 3 2 INSTRUMENT POWER SUPPLY The instrument may be supplied in two ways External supply red and yellow terminals rated voltage field 100 415V 50 60Hz Internal suppl...

Page 8: ...ed by internal batteries Flashing red internal batteries almost flat STATUS It described the instrument status Off No recording in progress Flashing green Recording in progress Green Instrument waitin...

Page 9: ...active power Phase 1 Ea1 Absorbed active energy Phase 1 Q1i Absorbed inductive reactive power Phase 1 Er1i Absorbed inductive reactive energy Phase 1 Q1c Absorbed capacitive reactive power Phase 1 Er1...

Page 10: ...otal Phase 1 Phase 2 Phase 3 PQA820 Pfti Pf1i Pf2i Pf3i Values of the absorbed inductive power factors Total Phase 1 Phase 2 Phase 3 dPfti dPf1i d Pf2i dPf3i Values of the absorbed inductive cos Total...

Page 11: ...Phase 2 Phase 3 dPfti dPf1i d Pf2i dPf3i Values of the absorbed inductive cos Total Phase 1 Phase 2 Phase 3 Pftc Pf1c Pf2c Pf3c Values of the absorbed capacitive power factors Total Phase 1 Phase 2 Ph...

Page 12: ...ent software 5 4 SETTING THE VALUE OF TRANSFORMATION RATIO OF VTS The instrument allows interfacing also with possible Voltage Transformers VT found in the system to be measured and displays the value...

Page 13: ...ing of all selected quantities will be started stopped at the set date and time To start recording the operator will have to press the START STOP key to set the instrument to Stand By waiting for the...

Page 14: ...bles of the L1 N voltages respecting the connections indicated in the Fig 2 4 If you want to measure current and power connect the clamp meter to the phase conductor respecting the direction indicated...

Page 15: ...ecting the connections indicated in the Fig 3 Connect the blue cable to the protective conductor 4 If you want to measure currents and powers connect the clamp meters to the phase conductors respectin...

Page 16: ...pecting the connections indicated in the Fig 4 Connect the blue cable to the system s neutral 4 If you want to measure currents and powers connect the clamp meters to the phase conductors respecting t...

Page 17: ...e for most of the cases in which the instrument is used Pressing the START STOP key starts recording the selected quantities according to the specifications set in the menu see 5 7 Since the default v...

Page 18: ...tself For further information on this issue please refer to the on line guide of the management software CAUTION All saved data can be seen only after transferring them onto a PC using the management...

Page 19: ...ted inside the PC or by installation of an USB WiFi adapter available in the market and can t be supplied under any circumstances by HT ITALIA 1 Activate the WiFi connection on the target PC ex by usi...

Page 20: ...he instrument in environments with high humidity levels or high temperatures Do not expose to direct sunlight Always switch off the instrument after use 10 2 CLEANING THE INSTRUMENT Use a soft and dry...

Page 21: ...9 9 0 7 rdg Current values correspondent to a voltage 5mV are zeroed AC TRMS Current STD transducers clamps Range mV Frequency Hz Resolution mV Accuracy 5 0 219 9 42 5 65 0 1 0 5 rdg 0 6mV 220 0 999 9...

Page 22: ...s PQA820 Insulation double insulation Pollution level 2 Max height of use 2000m 6562ft Measurement category CAT IV 300V AC to ground Max 460V between inputs 11 3 GENERAL CHARACTERISTICS Mechanical cha...

Page 23: ...mple Three phase 4 wire system Vref 230V LIM 10 LIM 10 Hysteresis 1 Higher Lim 230 23 253V Lower Lim 230 23 207V Recording swells The instrument starts recording an event if voltage exceeds 253V and s...

Page 24: ...must not be confused with short duration phenomena such as peaks drops or fluctuations It can be seen how in 1 the index of the summation goes from 1 to infinity What actually happens is that each sig...

Page 25: ...are therefore someway virtually distorted The most common distortion is the harmonic distortion caused by non linear loads such as household appliances personal computers or motor speed adjusters Harm...

Page 26: ...y dangerous overheating of the conductor Designers must consider the following three points when designing a power distribution system containing harmonic currents 1 The neutral conductor must have a...

Page 27: ...angle between voltage and current of phase n With distorted voltages and currents the above reported ratios change as follows Phase Active Power n 1 2 3 I V P n k n k n k k n cos 0 Phase Apparent Powe...

Page 28: ...e that in case of an electrical system with harmonics a further parameter called depurated power factor dPF is determined In fact this parameter represents the theoretical limit value the power factor...

Page 29: ...it takes the value of the active power in that moment Q The relative inductive or capacitive positive or negative reactive power is defined in the quadrant examined and therefore it takes the value of...

Page 30: ...the integration period harmonics excluded Average value of the quantity intended as arithmetical mean of all values recorded in the integration period Maximum value of the quantity in the integration...

Page 31: ...consequence of improper packaging Repairs which may become necessary as a consequence of interventions performed by unauthorized personnel Modifications to the instrument performed without the manufa...

Page 32: ...Via della Boaria 40 48018 Faenza RA Italie T l 39 0546 621002 4 lignes r a Fax 39 0546 621144 E mail ht htitalia it http www ht instruments com YAMUM0060HT0...

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