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ANALYZER OF THE QUALITY OF

ELECTRIC POWER SUPPLY

QNA-303

(Code 771 131 / 771 133)

USER’S MANUAL

( M98155201-

/ 03A )

(c)

CIRCUTOR S.A.

Summary of Contents for QNA-303

Page 1: ...ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA 303 Code 771 131 771 133 USER S MANUAL M98155201 20 03A c CIRCUTOR S A...

Page 2: ...ON STARTUP 9 5 1 Selecting the connection mode 9 5 1 1 Selecting the connection mode 3 wires 4 wires 10 5 1 2 Selecting the supply voltage 10 5 2 Connection cables 11 5 3 Starting the QNA 303 analyzer...

Page 3: ...Choosing the parameters to be recorded 23 6 2 1 Standard File STD 23 6 2 2 Events file EVQ 24 6 2 3 Incidents file EVE 25 7 QNA 303 COMMUNICATIONS 26 7 1 Demand format 26 7 2 Commands 27 7 2 1 Setup c...

Page 4: ...kindly requested to carefully read this manual before connecting and powering the analyzer in order to avoid irreversible damage which might be caused by an improper utilization 1 1 Checking the conte...

Page 5: ...trument must be immediately powered OFF In this case contact a qualified service representative 1 4 Operation instructions The QNA 303 is a programmable instrument so offering diverse operation modes...

Page 6: ...er is an instrument specially designed for the analysis of the electric power quality for that reason it only provides voltage inputs isolated by means of transformers Moreover the great variety of av...

Page 7: ...supply implies the need that this analyzer must deliver a high protection degree against severe electrical conditions Protective devices in voltage inputs Special type fuses able to withstand short te...

Page 8: ...ptional setting of a hysteresis value for each individual threshold The QNA 303 can perform quality analysis either over 3 wire or 4 wire distribution systems In accordance to the choice all quality m...

Page 9: ...ge harmonic distortion and the harmonic content EVE files File which contains all incidents referred to the QNA 303 itself file readout setup modification memory erasure power supply on off battery on...

Page 10: ...ly user configurable instrument in terms of the kind of network to be monitored and the supply voltage of the analyzer The QNA 303 can be indistinctly installed in a three phase distribution line with...

Page 11: ...and measuring circuits and then remove the frontal cover of the QNA 303 Verify that the position of the bridge agrees with the desired system arrangement Finally set also the selected configuration in...

Page 12: ...iption 1 Voltage UL1 2 Voltage UL2 3 Voltage UL3 1 2 3 4 5 6 7 5 Neutral Note This connection is not required when the monitored distribution system has no neutral conductor Power supply QNA Pin Descr...

Page 13: ...ELECTRIC POWER SUPPLY QNA 303 Page 12 RS 232 RS 485 communication connector QNA PIN Description 1 RX RS 232 2 CTS RS 232 3 TX RS 232 4 RTS RS 232 5 DSR RS 232 6 GND Rs 232 7 RX RS 485 8 TX RS 485 1 2...

Page 14: ...3 Maximum voltage in the voltage measuring circuit 4 wire arrangement 500 V line to neutral 866 V line to line 3 wire arrangement 500 V line to line 4 Analyzer burden 6 VA 5 Working conditions Working...

Page 15: ...oltageUL3 3 VoltageUL2 4 N oused 5 N eutral 6 N oused Power supply connection terminal QNA Pin Description 1 Supply UAL1 2 Supply UAL2 3 Earthing terminal 4 No used L1 L2 L3 N Voltageconnectionterm in...

Page 16: ...o used 7 No used Power supply connection terminal QNA Pin Description 1 Supply UAL1 2 Supply UAL2 3 Earthing terminal 4 No used L1 L2 L3 1 1 2 2 3 3 4 4 5 6 7 Power supply 0 230 400V Voltage connectio...

Page 17: ...supply connection terminal QNA Pin Description 1 Supply UAL1 2 Supply UAL2 3 Earthing terminal 4 No used L1 L2 L3 1 1 2 2 3 3 4 4 5 6 7 Power supply 0 230 400V Voltage connection terminal U L1 L2 L3...

Page 18: ...QNA Pin Description 1 Supply UAL1 2 Supply UAL2 3 Earthing terminal 4 No used L1 L2 L3 1 1 2 2 3 4 6 7 Power supply 0 230 400V Voltage connection terminal U L1 L2 L3 QNA Pin Description 1 Voltage UL1...

Page 19: ...uously energized during 4 hours in case of lack of voltage supply from the main This period of time of operation after a voltage supply loss is user programmable in order to economize the battery char...

Page 20: ...etwork rated voltage of the transformation ratio A right configuration of this point is essential since permits setting the limits for the analysis of the electric power supply quality Rated frequency...

Page 21: ...indow defined by the user voltage time constant If this period is set to 1 s then the instantaneous value equals the Vrms value Period of frequency sliding window To carry out the calculation of the a...

Page 22: ...2 5 of highest values would be neglected Inside the interval the maximum and minimum values are obtained and recorded If the user want to record the maximum and minimum values taking into account all...

Page 23: ...epends on the value set in this point of the rated voltage Every semicycle whose RMS value is below the defined limit value is stated to be a voltage dip A record will be saved into the event file EVQ...

Page 24: ...d File STD The standard file STD is used to store all parameters which are periodically recorded Over the user defined recording period following electric parameters will be saved into the memory Volt...

Page 25: ...of the instant of the event occurrence This value is obtained with an accuracy of one semicycle Type of event Indication of the event type that is a voltage dip a voltage swell or an interruption Thes...

Page 26: ...upted The analyzer is supplied from this moment by the on board battery Setup modification Record of the moment when any modification of the instrument setup is realized Memory formatting Indication o...

Page 27: ...system tries for several times to resubmit the same information until the verification of a complete communication interruption The application of this protocol assures to get optimum data transmissi...

Page 28: ...rmation ratios 00WRT 6 Primary U 3 Secondary U 5 Primary I 1 Secondary I 1 0 III fase 1 Aron 1 0 3 wire 1 4 wire 00ACK RRS Read communication parameters 00RRS 00 2 Peripheral number Parity Data length...

Page 29: ...file 00DEL 12 file ext 00FILE NOT FOUND 00ERR 00ACK DIF Consult a file content 00DIF 12 file ext 00 12 file ext 17 beginning date 17 ending date 6 Bytes no ASCII FOR Format memory 00FOR 00ACK 00ERR SZ...

Page 30: ...he communication mode to be used Several communication modes are available according to the QNA 303 model GSM 485 232 QNA 303 GSM X X QNA 303 232 485 X X QNA 303 units that require a communication cab...

Page 31: ...via the conventional phone line is wanted to be set The communication cable to be used in these cases is different and also the modem unit must be set to have no control of the DTR and to automatical...

Page 32: ...ent choice by inner connection Measuring range 0 to 500 V line to neutral 4 wire network 0 to 500 V line to neutral 0 to 866 V line to line 3 wire network 0 to 500 V line to line Scale switch Automati...

Page 33: ...1995 Harmonics EN 61000 3 3 1995 Voltage fluctuations EN 50081 2 1993 Industrial emission EN 55011 1994 Conducted EN 55022 Class B EN 55011 1994 Radiated EN 55022 Class A EM IMMUNITY EN 50082 2 1995 i...

Page 34: ...on should be done over the instrument open and powered and should those actions are essential high qualified operators must perform them Before any adjustment replacement maintenance or repairing oper...

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