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Summary of Contents for Circutor 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 ) CIRCUTOR S.A.
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Page 2: Table Of Contents
5.4.2.- Through voltage transformers:..............16 5.4.2.1.- Two voltage transformers ..............16 5.4.2.2.- Three voltage transformers..............17 5.5.- On-board battery of the QNA-303 analyzer ........... 18 SETTING THE QNA-303 UP ................18 6.1.- Operation setup of the QNA-303 analyzer ............. 19... - Page 3 6.2.- 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 QNA-303 COMMUNICATIONS................ 26 7.1.- Demand format ....................26 7.2.- Commands ....................27 7.2.1.- Setup commands..................27 7.2.2.- Commands for parameter readout............
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Page 4: Basic Instructions
This manual is aimed to familiarize the user with the operation of the power supply quality analyzer model QNA-303 in order to get the best from its features. The QNA-303 is an analyzer expressly developed for the supervision of the... -
Page 5: Safety Warnings
Page 4 1.3.- Safety warnings The manual you hold in your hands contains information and warnings about the QNA-303 that the user should respect in order to guarantee a proper operation of all the instrument functions and keep its safety conditions. -
Page 6: Main Features
The inner battery of the instrument assures the continuity of the measuring process by the QNA-303 in case of any supply voltage loss event (short or long-term line interruption). The QNA-303 is equipped with three A.C. voltage inputs which permit a simultaneous measurement of the voltage from all three phases, together with the frequency, in any power system. -
Page 7: Electrical Features
• Power supply: transformers with an over power dissipation and insulation. • Power supply by built-in battery to assure a voltage supply to the QNA-303 in case of voltage loss failure. • Insulation transformers to guarantee the proper insulation of inputs. -
Page 8: Analysis Modes
Also an optional 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 measurement will be referred to the line-to-neutral or line-to-line voltage.. -
Page 9: Data Collection In Memory (Automatic Mode)
Page 8 4.- DATA COLLECTION IN MEMORY (AUTOMATIC MODE) The QNA-303 is equipped with an internal clock for both date and time that permits the automatic data recording process in memory to be set (available capacity according to the model) at regular time periods. -
Page 10: Installation & Startup
In this case contact a qualified service representative. 5.1.- Selecting the connection mode The QNA-303 is a fully 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 neutral conductor (4 wires) or without neutral conductor (3 wires). -
Page 11: Selecting The Connection Mode (3 Wires / 4 Wires)
4-wire arrangement, and, on the other side, these events will be detected over line-to-line voltages for the 3-wire arrangement. To change the position of the bridge, first of all check that the QNA-303 is completely disconnected from the monitored main (both power supply and measuring circuits), and then remove the frontal cover of the QNA-303. -
Page 12: Connection Cables
* Note: This connection is not required when the monitored distribution system has no neutral conductor Power supply: QNA Pin Description Power supply AL1 Power supply AL2 Earthing terminal The connection of the earthing terminal is essential to assure the efficiency of QNA-303 protective elements. - Page 13 ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 12 RS-232/RS-485 communication connector: QNA PIN Description RX (RS-232) CTS (RS-232) TX (RS-232) RTS (RS-232) DSR (RS-232) GND (Rs-232) RX (RS-485) TX (RS-485) GND (RS-485)
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Page 14: Starting The Qna-303 Analyzer Up
6) Safety: Designed to meet protection class III as per EN 61010. Points to check during the installation process: 7) Verify that the earthing terminal of the QNA-303 is connected to the earth in order to avoid possible interferences over the analyzer to occur. If this earthing terminal is not connected, then the efficiency of the QNA-303 protection elements would be reduced. -
Page 15: Connection Diagrams Of The Qna-303 Analyzer
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 14 5.4.- Connection diagrams of the QNA-303 analyzer 5.4.1.- Direct connection 5.4.1.1.- Connection diagram for L.V. 4-wire power systems Power supply 0 - 230 - 400V Voltage connection term inal U (L1, L2, L3) -
Page 16: 2.- Connection Diagram For 3-Wire Power Systems
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 15 5.4.1.2.- Connection diagram for 3-wire power systems Power supply 0 - 230 - 400V Voltage connection terminal U ( L1, L2, L3) Voltage connection terminal U ( L1, L2, L3) -
Page 17: Through Voltage Transformers
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 16 5.4.2.- Through voltage transformers: 5.4.2.1.- Two voltage transformers A (P1) (P2) B A (P1) (P2) B A (P1) (P2) B a (S1) (S2) b a (S1) (S2) b... -
Page 18: 2.- Three Voltage Transformers
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 17 5.4.2.2.- Three voltage transformers (P1) A (P1) A (P1) A (P2) B (P2) B (P2) B A (P1) (P2) B (S2) b (S2) b (S2) b a (S1) -
Page 19: On-Board Battery Of The Qna-303 Analyzer
To accomplish this configuration, two different setup sections can be distinguished: • Operation Setup: To define the QNA-303 analyzer operation mode. • File Setup: To define the data collection procedure of the QNA-303 into the internal memory. (In this model, all parameters are fixed and cannot be user- changed). -
Page 20: Operation Setup Of The Qna-303 Analyzer
6.1.2.- Features of the monitored electrical network • Rated voltage: The rated voltage of the power system to be monitored by the QNA-303. When the measurement is direct, that is, no voltage transformer is used, then this voltage matches the network rated voltage. If any .../110 V~ voltage transformer is used, then the rated voltage to be set... - Page 21 Page 20 • Period of voltage sliding window: To carry out the calculation of the average, maximum and minimum voltage, the QNA-303 obtains one value each second. This instantaneous value corresponds to the average of V values which have been calculated within the sliding window defined by the user (voltage time constant).
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Page 22: Statistical Processing
Vmin • Confidence level for the frequency (%): An analogue processing performed by the QNA-303 over the voltage can be optionally applied over the frequency. If the user want to record the absolute maximum and minimum values, then a confidence level of 100 % should be set. -
Page 23: Quality Parameters
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 22 6.1.5.- Quality parameters • % of voltage swell threshold: The detection of a voltage swell depends on the value set in this point (% of the rated voltage). Every semicycle whose RMS value is over the defined limit value is stated to be a voltage swell. -
Page 24: Choosing The Parameters To Be Recorded
51% and 100% V% threshold V% threshold Vrms-1s Vmax Vmin Note: If a confidence level of 100% is set, then obtained values equal absolute maximum and minimum value. Flicker: The QNA-303 saves the Flicker value (Pst) obtained over the recording period. -
Page 25: Events File (Evq)
Type of event: Indication of the event type, that is, a voltage dip, a voltage swell or an interruption. These events are defined in accordance to the QNA-303 setup. (See Section ¡Error! No se encuentra el origen de la referencia.). The type of event also identifies the phase this event has happened over. -
Page 26: Incidents File (Eve)
Delete a file: Indication of the moment when the user has deleted any file from the QNA-303 internal memory. If the first data shown by the .EVE file is the indication that a file has been delete, then this means that the deleted file was the events file. -
Page 27: Qna-303 Communications
Page 26 7.- QNA-303 COMMUNICATIONS One of the main features of the QNA-303 in terms of communications is the use of the Z-MODEM protocol, both for the data retrieval and the instrument setting actions. This protocol is specially designed for the transmission via modem links. -
Page 28: Commands
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 27 7.2.- Commands 7.2.1.- Setup commands COMMAND CONCEPT QUESTION ANSWER Read QNA version $00VER $00 4 digits Reset $00INI $00ACK Read date $00RCL $00XX/XX/XX XX:XX:XX Write date $00WCLXX/XX/XXXX $00ACK... -
Page 29: Commands For Parameter Readout
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 28 7.2.2.- Commands for parameter readout COMMAND CONCEPT QUESTION ANSWER Read voltage quality $00RVQ $00 + (9 x 3) ascii char 7.2.3.- File managing commands COM- CONCEPT QUESTION ANSWER... -
Page 30: Connections Of Communication Cables
U(L1-L2-L3) RS 232/485 Antena Radio / GSM The QNA-303 analyzer is equipped with a RS communication port to set the communication to the PC. The connection arrangement will depend on the communication mode to be used. Several communication modes are available according to the QNA-303 model:... - Page 31 RS-232 7 – 8 The QNA-303 RS-232 can be communicated to a PC via an external modem. This system can be applied in these facilities for which a communication 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 automatically hold the line on when a call is received.
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Page 32: Technical Specifications
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 31 8.- TECHNICAL SPECIFICATIONS Power supply: Independent from the measuring circuit: 230 or 400 V ± 40 % Supply voltage: Frequency: 50...60 Hz. Burden: 6 VA Working temperature: -10...+50 ºC... - Page 33 ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY QNA-303 -- Page 32 Mechanical characteristics: Enclosure: IP-55 protection casing Weight: 2.5 kg Dimensions: Relevant standards EN 60664, EN 61010, EN 61036, VDE 110 , UL 94 __________________________________________ EM EMISSION − EN 61000-3-2 (1995), Harmonics.
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Page 34: Safety Considerations
IEC 348 standard and is factory-shipped in proper operating conditions. 10.- MAINTENANCE The QNA-303 does not require any special maintenance. No adjustment, maintenance or repairing action should be done over the instrument open and powered and, should those actions are essential, high-qualified operators must perform them.
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