Circutor QNA-412 Instruction Manual

ELECTRICAL SUPPLY

QUALITY ANALYZER

QNA-412 (2V)

( Code Q20510 / Q20520 )

INSTRUCTION MANUAL

(M98155401-01 / 05A)

(c)

CIRCUTOR S.A.

Page no. 1

QNA-412 TABLE OF CONTENTS page no.

1.- BASIC INSTRUCTIONS....................................................................................................2

1.1.- Checks on receipt. ....................................................................................................2

1.2.- QNA-412 models.......................................................................................................2

1.3.- Safety advice.............................................................................................................3

1.4.- Operating instructions. ..............................................................................................3

2.- GENERAL FEATURES. ....................................................................................................3

2.1.- Basic features. ..........................................................................................................4

2.2.- Electrical characteristics............................................................................................5

3.- ANALYSIS MODES...........................................................................................................6

4.- RECORDING IN THE MEMORY (automatically) .............................................................. 6

5.- INSTALLATION AND START-UP. ....................................................................................7

5.1.- Terminal ratio. ...........................................................................................................8

5.1.1.- Communications cables for RJ connectors. .....................................................9

5.2.- QNA-412 analyzer start up......................................................................................10

5.3.- Connection diagram for the QNA-412.....................................................................11

5.3.1.- 4 wire three phase systems. ...........................................................................11

5.3.1.1.- Direct voltage + three clamps................................................................ 11

5.3.1.2.- Three voltage transformers and three clamps.......................................12

5.3.2.- 3 wire three phase systems. ...........................................................................13

5.3.2.1.- Direct voltage and three clamps............................................................13

5.3.2.2.- Direct voltage and two clamps (ARON).................................................14

5.3.2.3.- Two voltage transformers and three clamps .........................................15

5.3.2.4.- Two voltage transformers and two clamps (ARON) ..............................16

6.- THE QNA-412 ANALYZER BATTERY............................................................................ 17

7.- OPERATION. ..................................................................................................................17

7.1.- Display and buttons.................................................................................................17

7.2.- Start-up. ..................................................................................................................18

7.3.- Display screens.......................................................................................................18

8.- SETTING THE QNA-412.................................................................................................19

8.1.- Programming Set-up for the QNA-412....................................................................19

8.1.1.- Voltage transformation ratio............................................................................19

8.1.2.- Features of the system. ..................................................................................20

8.1.3.- Quality Parameters. ........................................................................................20

8.1.4.- Information to be taken into account in the recording of the periodic values..22

8.2.- Variables to Record.................................................................................................22

8.2.1.- Standard File (STD)........................................................................................23

8.2.2.- EVENTS file (EVQ).........................................................................................24

8.2.3.- Incidents File (EVE). .......................................................................................25

9.- TECHNICAL FEATURES................................................................................................26

10.- SAFETY ADVICE............................................................................................................28

11.- MAINTENANCE. .............................................................................................................28

12.- TECHNICAL SERVICE. ..................................................................................................28

A. Appendix: Communications with QNA-412 connected to an External modem. ..............29

B. Appendix: Communications with QNA-412 (RS485).......................................................31

C. Appendix: Communications via TCP-IP converter. .........................................................32

D. Appendix : Installing and starting up the QNA-GSM. ......................................................33

E. Appendix: The QNA's measurement method. .................................................................35

Page no. 2

BASIC INSTRUCTIONS.

This manual assists in the installation and use of the QNA-412 supply quality

instruments and helps in obtaining the best performance from them.

QNA-412 analyzers are especially manufactured to control electrical supply
quality. They are manufactured using the latest technology and offer the most
advanced performance in electrical parameter measurement and recording for
industrial systems on the market today.

Carefully read this manual before connecting the equipment to avoid

incorrect use that may cause irrevocable damage.

1.1.- Checks on receipt.

On receipt of the equipment check the following:

a) The equipment is the same as the one ordered.

b) Check that the equipment has not been damaged during delivery.

c) Check that it is equipped with the following standard accessories:

1 RS-232 Communications cable (RJ-DB9-female)
1 QNA-412 Instruction manual.
1 CD with program for PC software and instruction manual
1 GSM Aerial (With GSM model only).

1.2.- QNA-412 models.

Code Model

Q20510 QNA – 412 RS485/RS232
Q20520 QNA – 412 GSM Free (SIM card not included)

Page no. 3

1.3.- Safety advice.

For safety reasons it is essential that anyone installing or handling the
QNA-412 follows the usual safety procedures as well as the specific
warnings in this instruction manual.

If the equipment is used in a way not specified by the manufacturer,

the equipment's protection may be compromised.

When it is likely that a loss of protection has occurred (for example visible
damage) the equipment must be disconnected from the supply. In this event contact
a qualified service representative.

1.4.- Operating instructions.

The QNA-412 is programmable, measuring instrument offering a series of
options that may be selected using the set up menus.

Before installing the equipment and taking measurements carefully read
sections INSTALLATION, START-UP and SETTING for the QNA-412 analyzer.
Select the most suitable way of obtaining the required data.

It must be remembered that once the equipment is connected, the

terminals may be dangerous when touched and opening the covers or

removing pieces may access parts that are dangerous when touched. The

equipment must not be used until it is fully installed.

2.- GENERAL FEATURES.

The QNA-412 quality analyzer is specially designed equipment to control
electrical supply according to the IEC 61000-4-30 standard.

• Harmonics measurement according to IEC 61000-4-7.

• Flicker measurement according to IEC 61000-4-15.

• Measurement of the main electrical parameters.

− Voltage, current, power, PF....

− Voltage and Current harmonic distortion...

− Neutral Current and Neutral-Earth Voltage

• 4 quadrant measurement (Consumption and generation).

• Flicker measurement according to IEC 61000-4-15.

• High degree of protection under severe electrical conditions:

− With a broad supply voltage and measurement margin.

− High degree of overvoltage and transient protection.

• Option to connect to 3 and 4 wire systems.

• With a broad supply voltage margin: 63 – 520 V AC.

• Internal battery. The equipment can continue recording in the absence of

power supply voltage.

• 4 Mbyte internal memory where all parameters measured by the QNA-412
are stored.

• GSM / RS-232 / RS-485 communication. (According to model).

• Assembled in self-extinguishing casing in sizes and with fixing points in

accordance with the DIN 43857 standard.

Page no. 4

2.1.- Basic features.

The QNA-412 quality analyzer is specially designed to analyse electrical

supply quality according to the specifications in the IEC 61000-4-30 standard.

It has 4 x 2V inputs (clamps) as well as the voltage inputs (isolated by
transformers). This means that as well as the supply quality calculations, the QNA­412 can be used as a system analyzer.

Its outer design in accordance with DIN 43857 makes it ideal for locating in
any meter station cabinet.

Moreover, the large variety of models makes the QNA-412 adaptable to any
situation and any communication mode.

The equipment's internal battery allows it to take measurements in the event of
any loss of voltage (interruption or dip). It is guaranteed that the QNA-412 continues
operating if there is an interruption in the equipment's power supply.

The QNA-412 has three AC voltage inputs that lets it analyse voltage in the
three phases and the frequency of a predetermined system (quality of supply).

The QNA-412 uses a DSP to analyse the quality of electrical supply according
to the IEC 61000-4-30 standard. The DSP analyses all cycles of the three voltage
phases and checks whether any incident has occurred (dip, interruption,
overvoltage). It also calculates harmonics and flicker according to the IEC 61000-4-7
and 61000-4-15 standards respectively.

Thanks to its 2V inputs (2V/5A ratio), the QNA-412 can analyse the main
electrical parameters in the 4 quadrants (Consumption and generation).

The QNA also has a Neutral current input and another to measure Neutral­Earth voltage. These parameters complete the information that the QNA supplies
when analysing the electrical system.

The QNA-412 has a 4 Mbyte internal memory where the quality parameters,
electrical parameters and incidents are recorded.

The QNA-412 memory has four types of files:

• *.STD: where the measured data (voltage, current, frequency, power,
energy, flicker, THD, unbalance...) is periodically stored.

• *.EVE: where any incident occurring to the QNA-412 is stored. (file
reading, Setup change, deleting from the memory, auxiliary power
supply on/off, battery off...).

• *.EVQ: Quality events file where incidents occurring with the electricity
supply are stored (interruptions, dips, overvoltages) plus supplementary
information about them (time when the incident occurred, length,
maximum/minimum voltage, average voltage, voltage prior to the
event).

• *.H24: where data is stored for statistical studies on the development of
the harmonics throughout a day.

Page no. 5

The parameters that the QNA-412 can measure are:

Parameter L1 L2 L3
Voltage X X X
Current (2V input) X X X
Frequency X
Active power X X X
Inductive reactive power X X X
Capacitive reactive power X X X
Apparent power X
Active energy X
Inductive reactive energy X
Capacitive active energy X
Power factor X X X

Voltage THD X X X
Current THD X X X
Harmonic Decomposition of voltage X X X
Harmonic Decomposition of current X X X
Voltage wave form X X X
Current wave form X X X
Neutral Current X
Earth neutral Voltage X
Flicker (PST) X X X
Dips X X X
Interruptions X X X
Overvoltage X X X
Unbalance X
Assymetry X

All these parameters are measured and recorded when the installation is

consuming or generating energy.

2.2.- Electrical characteristics.

Due to the fact that the QNA-412 is electrical supply quality recording
equipment, it must have a high degree of protection under severe electrical
conditions:

• High energy varistors for absorbing overvoltages and protecting the
equipment from costly repairs.

• Noise filter on the voltage input: Allows reliable measurements to be
obtained under the most adverse noise conditions.

• Power supply: transformers with higher power dispersal and isolation.

• Power supply from batteries allowing the QNA-412 to operate in the

absence of voltage supply.

• Isolating transformers to ensure input isolation.

Page no. 6

3.- ANALYSIS MODES.

The QNA-412 series analyzers have different operating modes depending on

how they are set.

The most important operating functions are:

• Measurement and recording in the memory the main electrical supply quality
parameters (voltages, flicker, harmonics and unbalance).

• Measurement and recording in the memory the main electrical parameters
(voltages, currents, frequency, power, PF ...

• Current measurement for Neutral and Neutral-Earth Voltage.

• Setting a voltage threshold to define different events (dips, interruptions and

overvoltages). There is also the option to set a hysteresis value for all these
thresholds.

• The QNA-412 may be installed in both 3 wire and 4 wire systems. All quality
measurements will be made with reference to Neutral or between phases
depending on the selection.

• The QNA-412 may also be used to measure via voltage and current
transformers

4.- RECORDING IN THE MEMORY (automatically).

The QNA-412 has an internal clock, with date and time, to allow it to

automatically record electrical parameters as well as any incident that may occur.

The storage memory for the QNA-412 has four independent blocks reserved
for each type of file that it records. The following information is found in each of these
files:

• *.STD: where the measured data (voltage, current, frequency,
power, energy, flicker, THD, unbalance) is periodically stored.

• *.EVE: where any incident occurring to the QNA-412 is stored (file
reading, Setup change, deleting from the memory, auxiliary power
supply on/off, battery off...).

• *.EVQ: Quality events file where incidents occurring with the
electricity supply are stored (interruptions, dips, overvoltages...) plus
supplementary information on them (time when the incident
occurred, length, maximum/minimum voltage, average voltage,
voltage prior to the event).

• *.H24: where data is stored for statistical studies on the

development of the harmonics throughout a day.

The QNA-412 has a rotating storage memory. This means that if the memory
is full, new data obtained is stored in place of the oldest recordings. Therefore, if no
data is to be lost, files from the memory must be downloaded before it starts
recording over information that has not yet been downloaded.

Page no. 7

5.- INSTALLATION AND START-UP.

This manual has information and warnings that the user must
follow to ensure the safe operation of the equipment and to maintain it
in good condition in terms of safety.

If the equipment is used in a way not specified by the

manufacturer, the equipment's protection may be compromised. Opening covers or
removing parts with the equipment connected to the power supply, may access parts
which are dangerous when touched.

In the event of a possible loss in safety (e.g. visible damage), the
equipment must be disconnected from the power supply. In the event of
this occurring, please contact a qualified service representative.

Page no. 8

5.1.- Terminal ratio.

Terminal

No.

Terminal Description

Upper board

21

VL1 measurement

22

Common L1

23

VL2 measurement

24

Common L12

25

VL3 measurement

26

Common L13

27

Neutral

28

Earth

29

Not connected

30

Not connected

31

Not connected

32

Not connected

33

Not connected

34

Not connected

R2

R1

12 431165789

21 22 24 3423 333026 3125 3527 3228 29

Upper connection terminal

35

Not connected

Lower board

1 Measured current IL1 S1
2 Measured current IL1 S2
3 Measured current IL2 S1
4 Measured current IL2 S2
5 Measured current IL3 S1
6 Measured current IL3 S2
7 Measured current Neutral S1
8 Measured current Neutral S2
9

Voltage input power supply

11

Voltage input power supply

R1 RS-232

R2

R1

12 4

31165789

21 22 24 3423 333026 3125 3527 3228 29

Lower connection terminal

R2 RS-485 / GSM Aerial

(According to model)

The QNA-412 may be installed in either a three phase system with Neutral (4
wire) or without Neutral (3 wire). Measurement only depends on the connection and
equipment setting.

Earthing is vital to the operation of the QNA-412's

protection.

Page no. 9

5.1.1.- Communications cables for RJ connectors.

The use of the RJ connectors will vary according to the QNA model used.

Therefore:

QNA-412 RS232 / RS485

R1 – RS-232 Communications
R2 – RS-485 Communications

QNA-412 GSM / RS232

R2

R1

12 4

31165789

21 22 24 3423 3 33026 3125 3527 3228 29

Lower connection terminal

R1 – RS-232 Communications
R2 – GSM aerial

RJ Connector (QNA)

Front view

16

2

3

4

5

Below are diagrams of the most usual connections for the QNA-412 communications
cables:

• RS-232 connection to a PC or to an external modem:

PC External Modem QNA-412

DB9 DB25 DB9 DB25

1–DSR 5–GND 7–GND 5–GND 7–GND
2–Rx 3–Tx 2–Tx 2–Rx 3–Rx
3–TX 2–Rx 3–Rx 3–Tx 2–Tx
4–CTS 7–RTS 4–RTS 8–CTS 5–CTS
5–RTS 8–CTS 5–CTS 7–RTS 4–RTS

6–GND 5–GND 7–GND 5–GND 7–GND

• RS-485:

QNA-412 RS-232/485 (DB9)

Converter
2–Tx/Rx(-) 2–Tx/Rx (-)
3–Tx/Rx(+) 1–Tx/Rx (+)
6–GND 5–GND

To communicate with a QNA-412-GSM via a mobile telephone, the RS­232 communications cable must not be connected at any time. If it is detected
that the RS232 cable is connected, any modem operation will be cancelled.

Page no. 10

5.2.- QNA-412 analyzer start up.

Before connecting the equipment to the mains please bear in mind the
following points:

1) Supply system voltage:

Voltage: 63 – 520 V AC.
Frequency: 50... 60 Hz.

2) Earth: The equipment must have the earthing cable connected. If it is not

attached, some of the equipment's protection will become ineffective.

3) Maximum current in the voltage measurement circuit: 500 V AC. between phase

and common:

 4 wire configuration: 500 V AC Neutral-phase / 866 V AC. phase-phase.
 3 wire configuration: 500 V AC. phase-phase.

4) Maximum measurement current: According to CLAMPS USED. In / 2 V AC.

5) Maximum measurement current: According to CLAMPS USED. In / 2 V AC.

6) Equipment consumption: 16 W.

7) Operating conditions:

• Operating temperature: 0º to 50º C.

• Operating humidity: 25% to 75 % RH.

8) Safety: Designed for category III installations according to EN 61010.

Points to check during installation:

8) Check that the earth has been connected to avoid interference to the equipment.
Not attaching the earth reduces the effectiveness of the QNA-412's protection.

9) Check the power measurements and their sign (Check the polarity of the current
transformers).

10) Check the QNA-412 analyzer setting.

Please note

A symptom of poor installation or wrong setting is the measurements flashing

on the display. The causes may be:

− The equipment has detected an event. This may mean that there has
actually been an event on the line (correct installation) or that the pre-set
nominal voltage does not match that of the system.

− If dashes appear on the balance screen: it means that the sequence of
the phase turn is wrong.

Page no. 11

5.3.- Connection diagram for the QNA-412.

5.3.1.- 4 wire three phase systems.

5.3.1.1.- Direct voltage + three clamps
(L1-L2-L3):

S1

S1

S1

S1

S2

S2

S2

S2

L1

L2

L3

N

R2 R1

12 431165789

21 22 24

3423 333026 3125 35

27

3228 29

Power supply AC.

Page no. 12

5.3.1.2.- Three voltage transformers and three clamps

(L1-L2-L3):

L1

L2

L3

R2

R1

12 431165789

21 22 24

3423 333026 3125 35

27

3228 29

Power supply AC.

S1

S1

S1

S2

S2

S2

Page no. 13

5.3.2.- 3 wire three phase systems.

5.3.2.1.- Direct voltage and three clamps

L1

L2

L3

R2

R1

12 4

31165789

21 22 24 3423 333026 3125 3527 3228 29

Power supply AC.

S1

S1

S1

S2

S2

S2

Page no. 14

5.3.2.2.- Direct voltage and two clamps (ARON)

L1

L2

L3

R2

R1

12 4

31165789

21 22 24 3423 333026 3125 3527 3228 29

Power supply AC.

S1S1S2

S2

Page no. 15

5.3.2.3.- Two voltage transformers and three clamps

L1

L2

L3

R2

R1

12 4

31165789

21 2 2 24 3423 333026 3125 3527 3228 29

Power supply AC.

S1

S1

S1

S2

S2

S2

Page no. 16

5.3.2.4.- Two voltage transformers and two clamps (ARON)

L1

L2

L3

R2

R1

12 4

31165789

21 22 24 3423 333026 3125 3527 3228 29

Power supply AC.

S1S1S2

S2

Page no. 17

6.- THE QNA-412 ANALYZER BATTERY.

The equipment has a battery for keeping the analyzer working and able to
properly record in the event of any incident occurring. The battery allows the
equipment to continue operating for 2-4 hours without mains supply. The time during
which the analyzer is to continue recording in the absence of mains supply is
programmable. In this way the QNA-412's battery can be saved and can detect
intermittent interruptions regardless of the time it takes to recharge.

The fact that the battery ensures 4 hours of operation is extremely important
because the equipment can continue recording and operating correctly in the event
of multiple and lengthy interruptions.

The battery always recharges when the analyzer

is connected to the system.

The QNA-412 Analyzer has an intelligent energy charge system This means that
the equipment is continuously monitoring the battery levels and if the charge level is
on maximum, it stops charging. This way the battery life is extended.

7.- OPERATION.

7.1.- Display and buttons.

The QNA-412 has a display where the information the QNA is collecting can be
displayed using the buttons.

The functions of the buttons on the QNA-412 are:

−

(Next screen): Moves on to the next display screen.

− (Previous screen): Displays the previous data screen.

Page no. 18

7.2.- Start-up.

A screen identifying the equipment will appear on the display when first

starting the QNA-412.

After a few seconds the first screen will appear where the voltages that the

QNA is measuring in the three phases will be displayed.

Using the and different display screens can be browsed.

7.3.- Display screens.

The different display screens on the QNA-412 are:

Voltage measured in the system.

 Current measured in the system.

 Active power.

kw not flashing = kW
kw flashing = MW

 Power factor.

 Unbalance coefficient.
 Asymmetry coefficient.
 Frequency.

Date

 Day / month
 Year

Clock

 Hours / minutes
 Seconds

 Neutral-Earth Voltage.
 Neutral Current.

Page no. 19

Comments

There are several symptoms that may detect poor installation or setting of the
QNA-412:

• The voltage measurements are flashing on the display. The causes may be:

− The equipment has detected an event. This may mean that there has

actually been an event in the line (correct installation) or that the pre-set
nominal voltage does not match that of the system.

− If the balance screen displays dashes: It means that the phase turn
sequence is wrong.

• Power screens with a minus sign:

− The installation is generating energy. Or actually, energy is being

generated or the current transformers are installed backwards.

− The PF values are wrong. Check the voltage phases and current
connection. The voltage and current phase do not correspond to that
connected to the QNA.

8.- SETTING THE QNA-412.

The QNA-412 is always set via a PC.

The operation of the QNA-412 analyzer will depend on the setting of the

equipment. There are two types of Set-up:

• Programming Set-up: This will define the QNA-412 analyzer's operating mode.

• File setup: This will define the variables that the QNA-412 is to record in its

internal memory

8.1.- Programming Set-up for the QNA-412.

There is a complete series of parameters that may be set in the analyzer:

8.1.1.- Voltage transformation ratio.

The QNA-412 system analyzer has the option to measure voltage via

transformers.

• Voltage primary / Voltage secondary: The voltage transformer ratio via
which the measurement shall be taken can be set. Where direct
measurements are to be made, this must be set as1/1.

• Current primary: The current transformer primary used for measuring
current can be set.

• Neutral current primary: The current transformer primary used for
measuring Neutral current can be set.

Page no. 20

8.1.2.- Features of the system.

• Nominal voltage: This is the nominal voltage measured by the analyzer.
For 3 wire settings the compound voltage must be set (e.g. 400 V), and for
4 wire, the simple voltage (e.g. 230 V). If measurement is done via voltage
transformers, the nominal voltage that is to be set must refer to the
secondary (e.g. 63.5 V). This value is vital to the proper working of event
recording.

• Nominal frequency: Nominal frequency of the system being analyzed.
This parameter is necessary for calculating the effective value of the signal
in extreme quality systems.

• 3 wire / 4 wire: The QNA-412 is designed to operate in installations with
Neutral (4 wire) or installations without Neutral (3 wire). For this, the type of
connection will be defined. This point is very important because it will
measure events depending on how it is set.

• Type of circuit: If measurement is being done via three current sockets,
the type of measurement circuit must be set as three phase. The QNA has
the option to measure current with the Aron system in installations that do
not have neutral (3 wire). This means that only two current sockets are
used for the measurements.

8.1.3.- Quality Parameters.

In order to calculate the supply quality, the voltage levels above which

an event will have deemed to occurred have to be set.

Therefore it is necessary to define the following points

• % Overvoltage threshold: Detecting overvoltage will depend on the value
that is set in this section. For every half cycle that its effective value exceeds
this defined value (% above nominal voltage) it will be considered to be
overvoltage. The events file (EVQ) will record each time this value is
exceeded, showing the phase, maximum voltage recorded, average voltage,
voltage prior to the event and the time when this threshold was exceeded.

Overvoltages

Hysteresis

Nominal Voltage

Hysteresis

Dip / Short cut-off

Hysteresis

Interruption / Cut

Page no. 21

• Overvoltage hysteresis: An overvoltage hysteresis is to be defined so that
the voltage at the start of the overvoltage is not the same as the voltage at the
end. Therefore an overvoltage starts when the overvoltage threshold is
exceeded and ends when it is below the value defined by difference between
the overvoltage threshold and the overvoltage hysteresis.

• % Dip threshold: Detecting a dip will depend on the value that is set in this
section. For every half cycle that its effective value exceeds this defined value
(% above nominal voltage) it will be considered to be a dip. The events file
(EVQ) will record each time this value is not exceeded, showing the minimum
voltage recorded, average voltage, voltage prior to the event and the time
when this threshold was not exceeded.

• Dip hysteresis: A dip hysteresis is to be defined so that the voltage at the
start of the dip is not the same as the voltage at the end. Therefore a dip starts
when the dip threshold is not exceeded and ends when it is above the value
defined by adding the dip threshold and the dip hysteresis.

• % Interruption voltage threshold: This is defined as power off (no voltage,
Interruption) by voltage dropping below a fixed value (% above nominal
voltage). The events file (EVQ) will record each time this value is not
exceeded, showing the minimum voltage recorded, average voltage, voltage
prior to the event and the time when this threshold was not exceeded.

• Interruption Hysteresis: An interruption hysteresis is to be defined so that
the voltage at the start of the interruption is not the same as the voltage at the
end. Therefore an interruption starts when the interruption threshold is not
exceeded and ends when it is above the value defined by adding the
interruption threshold and the interruption hysteresis.

• Time of recording the STD file. This is the section of the memory for this file
and is expressed in days. The value cannot be changed. It will depend on the
period of recording and the capacity defined in the other files.

• Number of recordings for the EVE file. This is the section of the memory for
the events file and states the number of events.

• Number of recordings for the EVQ file. This is the section of the memory for
the events file and states the number of events.

• Size of H24 recording file: Indicates the size of the H24 file.

Default Maximum STD

(Value Calculated – Not configurable)

Time of recording STD file (*)

34 days 5 hours 92 days 2 hours

EVE file

1365 682

Number of recordings

EVQ file

2554 5626

Size of H24 file (in Kb):

264 (33 days) 8 (1 day)

(*) The STD file has been calculated with a recording period of 10 minutes and the

variables of the STD file as a default.

(**) Minimum configurable values.

Page no. 22

8.1.4.- Information to be taken into account in the recording of the periodic

values.

There are a series of points to precisely define which information must be

used to calculate the recordings.

Therefore the following may be defined:

• Description of the Measurement point: This is only an identification field
used by the user.

• Comment: This is only an identification field used by the user.

• Recording Period: All electrical parameters will be recorded at the end of the

pre-set time (those parameters selected only). The average values obtained
during that period of time will be recorded. As default the recording period is
set at 10 Minutes. This value may range from 1 minute to 2 hours.

• Integrating blocks of 10 cycles with events (all except voltage): (Affects
the .STD file only). While the average voltage, flicker, harmonics are being
calculated, it is possible that an event occurs (overvoltage, dip, etc.). The QNA
allows (or does not allow) the 10 cycle block where such an event occurred to
be added to the integration. When this option is deactivated ("No"), the 10
cycle block will only be added to the average voltage.

• Integrating blocks of 10 cycles with events (voltage): (Affects the STD file
only). While the average voltage is being calculated, it is possible that an
event occurs (overvoltage, dip, etc.). The QNA allows (or does not allow) the
10 cycle block (this may be one or more depending on the length of the event)
where such an event occurred to be added to the integration. When this option
is deactivated ("No"), the 10 cycle block will only be removed and therefore not
added to the integration of this recording period. This option does not affect
the other parameters.

• Recording period: (Affects the STD file only). This is the period when the
averaged values are stored.

• Type of date: (Affects the STD file only). The date/time when the recorded
data in a recording is to be saved may be selected (Affects the STD file only).
This may be at the start or end of the recording.

• Battery disconnection time: The QNA may set the time for self
disconnecting the equipment when there is no mains supply. This means that
the battery is not completely run down when there are problems with electricity
supply. A typical value is about 15-30 mins.

8.2.- Variables to Record.

The QNA-412 stores all quality parameter recordings in its internal memory.

Data is stored in three files:

Page no. 23

8.2.1.- Standard File (STD).

The Standard File (STD) is used to store all those parameters that are

periodically stored.

With regard to the recording period preset in the QNA-412, recordings will be

made with the following electrical parameters (according to selection):

Parameter L1 L2 L3 File
Voltage (Neutral phase or Phase-Phase) X X X STD
Current X X X STD
Frequency X STD
Apparent power X STD

Consumption

Active power X X X STD
Inductive reactive power X X X STD
Capacitive reactive power X X X STD
Power factor X X X STD
Active energy X STD
Inductive reactive energy X STD
Capacitive reactive energy X STD

Generation

Active power X X X STD
Inductive reactive power X X X STD
Capacitive reactive power X X X STD
Power factor X X X STD
Active energy X STD
Inductive reactive energy X STD
Capacitive reactive energy X STD

Neutral Current X STD
Neutral-Earth Voltage X STD

Harmonics

THD voltage X X X STD
THD current X X X STD
Voltage harmonic decomposition

(Option to select any harmonic 2-40)

X X X STD

Current harmonic decomposition

(Option to select any harmonic 2-40)

X X X STD

Wave Forms (V, I) X STD
Flicker (PST) X X X STD

Quality

Dips X X X EVQ
Interruptions X X X EVQ
Overvoltage X X X EVQ

Unbalance

Unbalance X STD
Asymmetry X STD

* In the STD file all average values of the parameters are recorded.

Page no. 24

 Flicker:

• Pst: The QNA-412 records the value of Flicker (Pst) obtained during the

recording period. The Plt value is calculated by the PC analysis software.

 Harmonics:

 Harmonic Distortion: The QNA-412 will calculate and record the average

value of the harmonic distortion for voltage and current that has been
detected in the analysed system.

 Harmonic Decomposition: The QNA-412 will calculate and record the

average value of the rate of individual harmonic distortion for each of the
voltage and current harmonics in the analysed system (up to harmonic 40).
(Decomposition of each of the blocks of 10 cycles that have been
integrated within a recording period).

 Wave Forms:

 Voltage: One cycle record of the voltage signal's wave form at the time of

ending the recording.

 Current: One cycle record of the current signal's wave form at the time of

ending the recording.

 Unbalance:

 Coefficient of asymmetry: ratio between homopolar and direct voltage.
 Coefficient of unbalance: ratio between inverse and direct voltage.

8.2.2.- EVENTS file (EVQ).

The different events detected in the analysed electrical system are stored in

this file. The following information is stored for each of the events:

Event Date: This shows the time when the event occurred. This value is

obtained with an accuracy of one Cycle

Type of event: This is stored if the detected event is an interruption, dip or

overvoltage. These events are defined according to the setting for the QNA-412. The
type of event also identifies the phase in which it occurred.

Duration of the Event: How long the event lasted in milliseconds.

Maximum / minimum voltage of the Event: In the event of an interruption or

dip the minimum voltage RMS½ value (*) obtained during the event will be stored. In
the event of overvoltage the maximum value will be stored.

Average voltage of the event: Average voltage RMS½ value (*) obtained

during the recorded event.

Voltage prior to the event: The voltage RMS½ value (*) prior to the event is

stored.

(*) value RMS½ cycle: effective value of one complete cycle, updated every half
cycle.

Page no. 25

8.2.3.- Incidents File (EVE).

This file automatically stores the type and time of the incident that has occurred.

The QNA-412 is able to detect and record the following incidents, among others:

Battery Off: This will show the time when the QNA-412 stopped working. This

time depends on the value pre-set, because the equipment operates on an internal
battery in the event of a fault with the auxiliary power supply.

Auxiliary power supply On: This indicates the time when the power supply

was connected to the QNA-412.

Auxiliary power supply Off: This shows the time when the power supply to

the QNA-412 was interrupted. At this point power is supplied from the battery.

Setup Changed: This records the time when any change was made to the

equipment's Setup.

Memory Format: The time when the user decided to start the internal memory

on the QNA-412.

Internal memory format forced: There is an error with the internal memory

and the QNA-412 has automatically started all of the memory.

Deleting a file: The time when the user has deleted a file from the internal

memory of the QNA-412. If the first piece of information that appears in the EVE file
is file deleted, this means that the deleted file was an events file.

Changing the time: The date or the time on the equipment has been

changed. It is important to detect this type of event because on many occasions time
gaps between measurements are due to time changes.

Page no. 26

9.- TECHNICAL FEATURES.

Power supply:

Supply voltage: Independent from Measurement 63 – 520 V AC.
Frequency:

50...60 Hz.

Consumption:

16 W

Operating temperature:

0...50 ºC

Auxiliary power supply:

Battery: Ni-M-H
Independent operating life: 4 h continuous working
(For soft

this cannot exceed a time of 1 hour to extend battery life)

Voltage measurement:

Measurement Circuit: 3 or 4 wire configuration (Using external connection)
Measurement range: 0 to 500 V AC. (between phase and common).

Connection for 4 wire systems: 0 to 550 V AC. (phase-neutral).

0 to 952 V AC. (between phases).

Connection for 3 wire systems: 0 to 550 V AC. (between phases).

Changing the scale

: Automatic.

Other voltages

: Via measurement transformers.

Frequency

: 42.5 - 57.5 for 50Hz / 51 - 69 for 60Hz.

Current measurement:

Measurement range : ... /5A (according to transformers used).
Maximum current

: 1.2 In.

Changing the scale

: Automatic.

Accuracy:

Voltage: 0.1 % of nominal. (Class A according to IEC 61000-4-30)
Current:

0.1 % of nominal. (Class A according to IEC 61000-4-30)

Power:

0.2 % of nominal

Unbalance: ± 0.15% (Class A as per IEC 1000-4-30)
Flicker: <5% as per IEC 61000-4-15

(Class A according to IEC 61000-4-30)

Harmonics: Class I as per IEC 61000-4-7

(Class A according to IEC 61000-4-30)

Accuracy given with the following measuring conditions:

- Exclusion on errors made by voltage transformers.

- Temperature range

: 5 to 45 ºC.

- Measurement margin

: between 5 % and 100 %.

Memory:

Memory size: 4 Mbytes.
Memory Configuration: Rotating.

Default Maximum STD

(Value Calculated – Not configurable)

Time of recording STD file (*)

34 days 5 hours 92 days 2 hours

EVE file

1365 682**

Number of recordings

EVQ file

2554 2042**

Size of H24 file (in Kb)

264 (33 days) 8 (1 day)**

(*) The STD file has been calculated with a recording period of 10 minutes and the

variables as a default for the STD file.

(**) Minimum configurable values.

Processor:

Sampling frequency : 5120 k samples/second for each channel (6 channels).
Converter : 16 bits (Sigma delta).

Page no. 27

Assembly Features:

Casing: According to DIN 43859 standard
Sizes: According to DIN 43857 Standard

176

94.5

327

Weight: 2.3 Kg

STANDARDS

Quality: IEC 61000-4-30.
Harmonics: IEC 61000-4-7.
Flicker: IEC 61000-4-15.

Other standards

EN 60664, EN 61010, EN 61036, VDE 110, UL 94.

__________________________________________

ELECTROMAGNETIC EMISSION.

− EN 61000-3-2 (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).

ELECTROMAGNETIC IMMUNITY.

− EN 50082-2 (1995), Industrial immunity.

− EN 61000-4-2 (1995), Electrostatic discharge.

− ENV 50140 (1993), RF EM radiated fields.

− EN 61000-4-4 (1995), Rapid transients bursts.

− ENV 50141 (1993), RF in common mode.

− EN 61000-4-8 (1995), Magnetic field at 50 Hz.

− EN 50082-1 (1997), Domestic immunity.

− EN 61000-4-5 (1995), Shock wave.

− EN 61000-4-11 (1994),Power supply interruptions.

Page no. 28

10.- SAFETY ADVICE.

The installation rules in the previous sections (INSTALLATION
AND START UP, FORMS OF INSTALLATION AND TECHNICAL
FEATURES) have to be borne in mind.

When the equipment is connected, the terminals can be
dangerous when touched. Opening covers or removing objects may access parts
that are dangerous when touched. This equipment has been designed to conform to
the IEC-348 standard and is supplied in proper working order.

11.- MAINTENANCE.

The QNA-412 does not require special maintenance. Any adjustment,
maintenance or repair to the open equipment is to be avoided. If it cannot be avoided
it must be undertaken by someone qualified and well informed of the necessary
action.

Before any connection, replacement, maintenance or repair the equipment
must be disconnected from any power supply.

When the equipment or its protection is suspected to be faulty, it must be
taken out of service and any accidental connection avoided.

The equipment is designed to be changed quickly in the event of any
breakdown.

12.- TECHNICAL SERVICE.

In the event of any equipment failure or any operational queries please contact
the technical service of CIRCUTOR S.A.

CIRCUTOR S.A. - After sales service.
Vial Sant Jordi, s/n
08232 - Viladecavalls.
Tel. -

([phone]

Fax - ([phone]

E-mail - [e-mail]

Page no. 29

A. Appendix: Communications with QNA-412 connected to an External
modem.

One of the most usual configurations for the QNA-412 is for it to be connected
with an external modem.

Modem

A

Modem B

To connect it and before its definitive start up, it must be remembered that
both Modems have to establish the correct form of communication. To do so, a
minimal setting for the modem making the call and the modem connected to the QNA
has to be made.

To do this setting, the Hyperterminal program on Windows or equivalent must
be used. The configuration for the modem is:

• MODEM A (PC):

AT&F Default configuration.
AT&D2 Activates the operations of the DTR Data Terminal Ready.
AT&S0 Leave the DSR active Data Set Ready.
AT&W0 Store the configuration.

• MODEM B (QNA-412):

AT& F Default configuration.
AT&D0 Override the DTR.
AT&K3 Deactivate data compression.
AT&R1 The modem ignores the RTS.
AT&N6 Increase the speed of the modem to 9600 bps.
ATS0=1 Activate the modem so that responds to the first ring.
AT& W0 Store the configuration.

The AT commands here may be varied according to the type of modem.
To correctly configure, consult the manuals for the installed equipment.

Page no. 30

Communications cables

RJ Connector

QNA-412 Modem (DB9) Modem (DB25)

1–DSR 5–GND 7–GND

2–Rx 2–Rx 3–Rx

3–TX 3–Tx 2–Tx

4–CTS 8–CTS 5–CTS

5–RTS 7–RTS 4–RTS

Front view

16

2

3

4

5

6–GND 5–GND 7–GND

Possible problems

The majority of problems that may be encountered with this configuration

are caused by the Modem.

Problem Solution

Check that the computer port being used is the one
that is connected to the Modem.

Verify that the computer port and Modem port are
working properly using a Hyperterminal program or
similar.
Verify the Modem connections.

Modem A is not calling

Verify the telephone line and its connection.
Check that the modem is on. Modem B is not responding.
Check that the command for the modem to answer
on the first ring has been made (ATS0=1).
Verify that the port being used is the R1 and that the
cable is connected.

Modem B answers but does
not receive a response from
the equipment.

Verify the QNA communications port setting. Verify
that it is 9600 bauds.

Operation has been checked to be correct for the following types of Modems:

VAYRIS, MULTITECH, WESTERMO and U.S. ROBOTICS.

The local modem (A) cannot make a call via a telephone

switchboard. It must be a direct line.

Page no. 31

B. Appendix: Communications with QNA-412 (RS485).

The QNA-412 has the option for RS-485 communication with a PC. This
connection is via the R2 port on the QNA.

This type of communication is done when the equipment is at a considerable
distance (maximum 1200m) from the computer from which readings are to be made.

To connect in this way, the cables that must be used are:

• PC.  RS-232 / RS-485 Converter

RS-232

P.C. (DB9) P.C. (DB25) RS-232/485 (DB9) Converter

3–Tx 2–Tx 2–Rx

2–Rx 3–Rx 3–TX

7–RTS
8–CTS

5–GND 5–GND 5–GND

• QNA-412  RS-232 / RS-485 Converter

RS-485

QNA-412

QNA-412 RS-232/485 (DB9) Converter

2–Tx/Rx(-) 2–Tx/Rx (-)

3–Tx/Rx(+) 1–Tx/Rx (+)

6–GND 5–GND

Front view

16

2

3

4

5

Ensure that the RS-232 cable is not connected to the PC. This is a priority port for

the RS-485.

This connection will prevent the QNA from communicating via the RS-485 port.

Page no. 32

C. Appendix: Communications via TCP-IP converter.

The QNA may also be connected to a PC via an ETHERNET system.

In order to configure this, CIRCUTOR S.A. has a TCP-IP / RS 232-485
converter that allows any piece of equipment with RS-232 or RS-485 communication
to be connected to a PC via an ETHERNET system.

To set the converter so that it converts the signal to RS-485, use the switch on
the converter itself. Check that the cable joining the QNA-412 with the TCP/IP
converter respects the Tx/Rx connection.

TCP/IP

QNA-412 TCP/IP Converter

3 A (+)
2 B (-)
6 S (GND)

TCP/IP CONVERTER

Page no. 33

D. Appendix : Installing and starting up the QNA-GSM.

Configure the QNA-412 before installing the new SIM card.

The contracted GSM line must be enabled for data transmission!!!

In order for the QNA to be able to communicate via the GSM Modem on the
QNA-412 GSM/RS-232 it is first necessary to configure the SIM card for the

telephone line that is to be used.

To do this it is always necessary to install a new SIM card in the QNA GSM.
This is both for when it is being done for the first time and when changing the SIM
card.

To do so it will be necessary to:

1. Without introducing the SIM card:

1) Start the QNA.

2) Connect the QNA via the RS-232 series port using a communications
cable.

3) Using the PC software: Add a QNA or, when changing the SIM card,
change the setting for the existing QNA.

4) In the software option, general parameters, select option "Change PIN".

The following screen will appear:

5) Select the options “Change SIM” and “Activate PIN use”.

6) Enter the PIN and the PUK for the SIM card to be installed.

7) Accept the operation and follow the steps shown by the software:

a. Enter the new SIM card and then disconnect the RS-232

communications cable from the equipment.

Page no. 34

2. How to install the SIM card

8) Undo the screws from the SIM card holder cover.

Tapa

Soporte SIM

9) Carefully remove the part.

10) Take out the SIM card safety holder.

11) This safety position will allow the holder to be opened and the SIM card installed.

12) Close the holder and replace it in its original position.

13) Gently attach the cover for the SIM card holder on the QNA.

14) Screw on the cover to avoid operating problems with the SIM card.

3. With the new SIM card installed:

15) Disconnect the RS-232 cable from the equipment.

16) Wait for indication from the PC software (Approximately 60 secs.).

17) Reconnect the RS-232 communications cable to the QNA.

18) Check that the PC software de PC is showing the result of the action. If the result

is:

 Satisfactory: The QNA modem is ready to operate.
 Error: It has not been possible to start the SIM card. Check the setting again.

Very carefully follow all the steps.

After installation, check that the RS-232 cable is not connected to the PC.

If it is connected, it will prevent the QNA from communicating via the GSM modem.

The local modem must not be connected via a telephone

switchboard. It must be a direct line.

SIM card

holder cover

Page no. 35

E. Appendix: The QNA's measurement method.

Input: V1-V2

V2-V3
V3-V1

EVERY HALF
CYCLE

EVERY CYCLE

EVERY 10 CYCLE S

EVERY 24 HOURS

Vrms

CALCULATION
150 CYCLES

Vrms
CALCULATION
FOR 10 MIN.
AND STORAGE
IN STD FILE

DIP,
OVERVOLTAGE,
INTERRUPTION,
UNBALANCE,
EVQ STORAGE
CALCULATION

UNBALANCE
CALCULATION

UNBALANCE
150 CYCLES

UNBALANCE
CALCULATION
OVER 10 MINUTES
AND STORAGE
IN STD FILE

HARMONICS
AND THD/d
CALCULATION

CnSH HARMONICS
CALCULATION
AND STORAGE
IN STD FILE

MAX CnSH VALUE
CALCULATION
FOR HARMONICS
STATISTICS
H24 FILE

PST
CALCULATION
AND STORAGE
IN STD FILE

FLICKER

Pinst

MEASUREMENT

EVERY 6
SAMPLES

MAX CnVS VALUE
CALCULATION
FOR HARMONICS
STATISTICS
H24 FILE