Extech Instruments PQ3350 User manual

User Manual
Power and Harmonics Analyzer
Model PQ3350
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PQ3350 V5.2 11/10
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EN 61010-2-032
CATIII600V
PollutionDegree2
Definition of Symbols:
Caution: Refer to Accompanying Documents
Caution: Risk of Electric Shock
Double Insulation
Over-voltage category III (CAT III): equipment in fixed installations.
WARNING: If the power analyzer is used in a manner not specified by the
manufacturer, the protection provided by the clamp meter may be impaired.
Please read the following instructions before use
1. Do not operate this instrument in wet or dusty environments.
2. Do not operate this instrument in the presence of combustible or explosive gas
3. Do not touch exposed metal parts or unused terminals.
4. Consider the use of rubber gloves in operation.
5. Do not operate in excess of AC 500V (Phase to Neutral), or AC 600V (Phase to Phase)
6. Do not operate this instrument if it appears to be malfunctioning
Do not use the flexible current probe before reading the following instructions.
1. Do not install the flexible current probe around bare conductors carrying a voltage from
30V to 600V unless you are wearing protective clothing and glove suitable for
high-voltage work.
2. Always inspect and check for any damage of the current probe assembly before usage.
Do not use the flexible current probe if any damage is found.
3. Do not use the flexible current probe on circuit rated higher than 600V in installation
category III.
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PQ3350 V5.2 11/10
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Table of Contents
Preparation for use........................................................................................................11
Power Quality of a 3 Phase 4Wire (3P4W) System.................................................13
Power Quality of a 3 Phase 3Wire (3P3W) System.................................................13
Power Quality of a Single Phase (1P2W) System.....................................................15
Power Quality of a 1 Phase 3Wire (1P3W) System.................................................16
Measurement of a System with CT orVT(PT)........................................................17
HarmonicAnalysis ofVoltage or Current..................................................................18
DisplaythePhaseAngle of Harmonics......................................................................19
Measurement of Maximum Demand.........................................................................20
Waveform of Voltage and Current..............................................................................20
Waveform for Voltage Only........................................................................................21
Graphic Phase Diagram...............................................................................................21
Phase Sequence of a 3 Phase System.........................................................................23
Balanced and Unbalanced 3 Phase (3P3W, 3P4W) Power Source System............23
Balanced and Unbalanced 3 Phase (3P3W or 3P4W) Load System.......................24
Transient Capture (Dips, Swells, Outage)..................................................................25
Down LoadTransient Data.........................................................................................27
Datalogging Power Data (3P4W, 3P3W, 1P2W, 1P3W) .........................................27
Down Load Power Data..............................................................................................27
Data Logging Harmonics Data...................................................................................28
Down Load Harmonics Data......................................................................................28
Clear Memory of Data.................................................................................................28
HardCOPYof SCREEN.............................................................................................29
READ the SAVED SCREEN.....................................................................................30
SETTHE CTAND VT(PT) RATIO........................................................................31
SETTHETIME INTERVALFOR MAXIMUM DEMAND...............................32
SETTHE SAMPLINGTIME FOR DATALOGGING.........................................33
SETTHE CALENDER CLOCK..............................................................................34
PROTOCOL(RS-232C INTERFACE)....................................................................34
SPECIFICATIONS (23°C± 5°C) ........................................................................35
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PQ3350 V5.2 11/10
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FEATURES
■ Analysis for 3P4W, 3P3W, 1P2W, 1P3W
■ True RMS value (V123 and I123)
■ Active Power (W, KW, MW, GW)
■ Apparent and Reactive Power (KVA, KVAR)
■ Power Factor (PF), PhaseAngle (Φ)
■ Energy (WH, KWH, KVARH, PFH)
■ Current measurement from 0.1mAto 3000A, capable of analyzing IT standby power consumption
to the maximum demand of a factory
■ Display of 35 Parameters in One Screen (3P4W)
■ Programmable CT (1 to 600) and PT (1 to 3000) Ratios
■ Display of Overlapped Voltage and Current Waveform
■ Maximum Demand (MD KW, MW, KVA, MVA) with Programmable Period
■ HarmonicAnalysis (V123 and I123) to the 99th Order
■ Display of 50 Harmonics in one Screen with Waveform
■ Display of Waveform with Peak Values (1024 Samples / Period)
■ Analysis of Total Harmonic Distortion (THD-F)
■ Graphic Phase Diagram with 3 Phase System Parameters
■ Capture 28 Transient Events (Time + Cycles) with Programmable Threshold (%)
■ DIP, SWELL, and OUTAGE are included in transient events.
■ 3 Phase Voltage or Current Unbalanced Ratio (VUR, IUR)
■ 3 Phase Voltage or Current Unbalanced Factor (d0%, d2%)
■ Calculated Unbalanced Current through Neutral Line (In)
■ 512K Memory with Programmable Interval (Sampling time from 2 to 6000 seconds, data logging
time from 4.7 hours to 1180 days for 3P4W system)
■ Output of Waveform, Power Parameters and Harmonics on Command
■ Large Dot Matrix LCD Display with Backlight
■ Optical Isolated RS-232C Interface
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PQ3350 V5.2 11/10
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PANEL DESCRIPTION
POWER
V1 V2 V3
I1 I3
I2
12
34
5
6
7
8
9
1
0
1
1
12
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Panel Description
1. Input Terminal for Neutral Line (Voltage)
2. Voltage Input Terminals for Each Phase (V1, V2, V3)
3. External DC Input (The AC adaptor must be 600V isolated)
4. Current Input Terminals for Each Phase (I1, I2, I3)
5. LCD Display
6. Indication of locations where SEC., CT, VT, and SETUP are displayed in LCD.
7. Buttons
8. RS-232C Window
9. Stand Holder
10. Stand
11. Battery Cover
12. Battery Compartment
Press this button to exit transient detection mode.Also used to exit the SETUP menu
Press this button to perform transient detection
Press this button to hold the data displayed in LCD, press again to continue operation.
Press this button to begin the measurement of harmonics in magnitude.
Press this button to select V1, I1, V2, I2, V3, or I3 for harmonics analysis
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PQ3350 V5.2 11/10
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Press this button for the voltage or current input range
Press to enter the Main Menu (also used to navigate menu items).
Press this button to increment value by one. Hold the button for two seconds or
more to speed up the increment.
Press this button to decrement value by one.
In harmonic analysis mode, use these buttons to move the cursor left or right.
Press this button to start data logging. Press it again to stop data logging.The
sampling interval is displayed in the LCD via the SEC indicator.
In the power mode, press this button to display the phase. In the harmonic
analysis mode, press this button to display phase angle instead of magnitude.
Press this button to turn the back light on. Press it again to turn the back light off.
Press this button to begin measuring power.
Press this button to display the waveforms for voltage and current.
Press this button to display the waveform for voltage only
In the power mode, press this button to select the appropriate system (3P4W,
3P3W, 1P2W or 1P3W). In the waveform mode, press to select (V1, I1), (V2, I2),
or (V3, I3).
Press this button to turn the power on or off.
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PQ3350 V5.2 11/10
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Current Probe (100A)
WARNING: All the current probes connected to the power analyzer must be of the same
model and same range. Mixed models and different ranges selected will cause incorrect
result of measurement.
1. JawAssembly
2. Trigger
3. Range Selector
4. 6 pin mini DIN connector
NOTE: To choose the 100Acurrent probe, press the SETUP button to select CLAMP. When the
CLAMP is reverse video, press the ▲or ▼button to select 100.
Current Probe (1000A)
1. JawAssembly
2. Trigger
3. Range Selector
4. 6 pin mini DIN connector
NOTE: To select the1000Acurrent probe, press the SETUP button to select CLAMP. When the
CLAMP is reverse video, press the ▲or ▼button to select 1000.
(HARMON)
(POWER)
(HARMON)
60A
100A
100A
10A
1A
100A
1A
10A
10A
100A
1000A
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Flexible Current Probe (3000Aor 1200A)
1. Control Box
2. Output Range Select Switch
3. Flexible Loop
4. CouplingAssembly
NOTE: To select the 3000Aflexible current probe, press the SETUP button to select CLAMP. When
the CLAMP is reverse video, press the ▲or ▼button to select 3000.
NOTE: To select the 1200Aflexible current probe, press the SETUP button to select CLAMP. When
the CLAMP is reverse video, press the ▲or ▼button to select 1200.
WARNING: All thecurrent probes connected to the power analyzer must be of the same model and
same range. Mixed models and different ranges will yield incorrect measurement results.
1
2
3
4
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PQ3350 V5.2 11/10
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OPERATING INSTRUCTIONS
NOTE: Pay special attention to the flexible current probe connecions.
1. Connect the flexible probe around the conductor.
2. Make sure the current flowing direction is in consistent with the arrow marked on the probe
coupling. If the flexible current probe is connected in the right orientation, the correct phase
will be displayed in the oscilloscope.
3. Keep the probe coupling more than 25mm away from the conductor.
WARNING: Always wear appropriate gloves in operation.
NOTE: Select the correct CLAMPin the SETUP menu. When the current probe is connected to the
power analyzer, the power analyzer will automatically detect the range selected.
NOTE: Select the correct frequency (Hz) in the SETUP menu.
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Preparation for use
a. Press SETUP button to enter setup screen. Press SETUP again to select the item for setting
(the selected item will be displayed in reverse video).
After selecting the item, press ▲or ▼buttons to set up itsvalue.
b. After finishing setting up, press EXIT button to leave setup mode.
1. Select the data for download:
H means harmonics;
H in reverse video means HOLD screen data (if the data is the one you want, you can press
HOLD button to display the data, and press HOLD button again to exit);
P means power data which can be a reference for downloading, the data in order is 0~84.
2. Shows the total logged data in the analyzer: max. 85 logging data.
3. REC DATE: shows the starting logging time of the 1st downloaded file.
4. Hz: set up the frequency (50, 60 or AUTO) of the system.
5. PT: set up PT value.
6. CT: set up CT value.
7. SEC: set up the interval seconds of logged data.
8. CLAMP: set up the clamps selected (100A, 1000A or 3000A).
9. MD TIME: set up the time of Maximum Demand (1~60 minutes).
10. TRANS REF: set up the transient voltage (which will be automatically changed in accordance with
PT).
11. SDVP: set up upper and lower limits % of transient voltage detection.
12. YEAR: Set up “year” of calendar clock.
13. MONTH: Set up “month” of calendar clock.
14. DATE: Set up “date” of calendar clock.
15. HOUR: Set up “hour” of calendar clock.
16. MINUTE: Set up “minute” of calendar clock.
17. SECOND: Second can be displayed only (it can not be adjusted).
12
3
45
67
89
1011
12 13 14 15 16 17
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PQ3350 V5.2 11/10
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PQ3350 V5.2 11/10
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Power Quality of a 3 Phase 4 Wire (3P4W) System
a. Turn the power on. Press the POWER and the 1Φ3Φbuttons to select the 3P4W system. The
type of system will be displayed at the left bottom corner in the LCD.
b. Connect the four test leads to the voltage terminals V1, V2, V3 and the VN(Neutral) of the
system.
c. Connect the test leads to L1, L2, and L3 of the 3P4W system.
d. Connect the three current probes to the power analyzer input terminal I1, I2, and I3.
e. Clamp on to the L1, L2, and L3 of the 3P4W system. Make sure the current flows from the front
of the current probe to the back.
f. All of the system parameters will be shown in the LCD
For a description of each parameter, refer to section XIV. NOMENCLATURE.
Power Quality of a 3 Phase 3 Wire (3P3W) System
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PQ3350 V5.2 11/10
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a. Turn the power on. Press the POWER and the 1Φ3Φbuttons to select the 3P3W system.
The type of system will be displayed at the bottom right of the LCD.
b. Connect the four test leads to the voltage terminals L1, L2, and L3 of the system.
c. Connect the three current probes to the power analyzer input terminal I1, I2, and I3.
d. Clamp on to the L1, L2, and L3. Make sure the current flows from the front of the current probe
to the back.
e. All parameters of the system will be shown in the LCD
For a description of each parameter, refer to XIV. NOMENCLATURE.
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Power Quality of a Single Phase (1P2W) System
a. Press POWER and then 1Φ3Φto select the 1P2W system. The type of system will be
displayed at the bottom right of the LCD
b. Connect the test leads to the voltage terminals L1 and VN(Neutral) of the system.
c. Connect one current probe to the power analyzer input terminal I1.
d. Clamp on to the L1. Make sure the current flows from the front of the current probe to the back
(see arrow labeled on clamp probe).
e. All of the parameters of the system will be shown in the LCD
For a description of each parameter, refer to XIV. NOMENCLATURE.
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Power Quality of a 1 Phase 3 Wire (1P3W) System
a. Turn the power on. Press the POWER and the 1Φ3Φbuttons to select the 1P3W system.
The type of system will be displayed at the bottom right of the LCD.
b. Connect the test leads to the voltage terminals L1, L2 and VN(Neutral) of the system.
c. Connect the two current probes to the power analyzer input terminal I1 and I2.
d. Clamp on to the L1 and L2. Make sure the current flows from the front of the current probe to
the back.
e. All of the system parameters will be shown in the LCD
For a description of each parameter, refer to XIV. NOMENCLATURE.
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PQ3350 V5.2 11/10
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Measurement of a System with CT or VT (PT)
a. Turn the power on. Press the POWER and the 1Φ3Φbuttons to select the 3P4W system.
The type of system will be displayed at the bottom right of the LCD.
b. Connect the four test leads to the secondary voltage terminals L1, L2, L3 and the VN(Neutral)
of the system.
c. Clamp on to the secondary coils of L1, L2, and L3. Make sure the current flows from the front
of the current probe to the back (see the arrow label on the clamp probe).
d. Press SETUP to enter the SETUP menu.
e. Press SETUP several times until the CT symbol is highlighted.
f. Press the
▲or ▼button to increment or decrement the RATIO specified by the CT.
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PQ3350 V5.2 11/10
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g. Press the SETUP button several times until the VT symbol is highlighted.
h. Press the
▲or ▼button to increment or decrement the RATIO specified by the VT.
i. All 35 system parameters will be shown in the LCD
For a description of each parameter, refer to XIV. NOMENCLATURE.
HarmonicAnalysis of Voltage or Current
(Normal Voltage without Distortion and Harmonics)
(Distorted Current with Harmonics)
a. Setup the analyzer for measurement of any power system (3P4W, 3P3W, 1P2W, or 1P3W). To view
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PQ3350 V5.2 11/10
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the harmonic analysis of voltage or current, press the HARMO button.
b. Once the HARMO button is pressed, the waveform will be shown in the left-hand portion of the LCD,
and the 1st to 50th order harmonics will be shown in the right-hand portion of the LCD.
c. The positive and negative peak values will be shown in the waveform (Vpk).
d. The true RMS value & total harmonic distortion of voltage or current is shown under the waveform.
e. The cursor (↑arrow) will point to the current order of harmonics. The frequency (HZ) will be displayed
next to the cursor. The percentage of harmonics (%) will be displayed below the cursor. The
magnitude of the harmonics (V or A) or phase angle will be displayed next to the %.
f. Press the SETUP button several times until HAR is highlighted.
g. To move the cursor to the next harmonic, use the ◄or ►button.
h. To see the next page (51st to 99th order) press the ►button to pass the 50th order or press the ◄
button to pass the 1st order.
NOTE: If the waveform is clipped at the peak or too small in the LCD, press the RANGE button to
select HIGH or LOW range for a better display. The range indicator is the symbol after the unit of
RMS value, Lor H.
Display the PhaseAngle of Harmonics
When the HARMO button is pressed the magnitude of each harmonic is displayed. To review the phase
angle of each harmonic, press the PHASE button. The phase angle will be displayed next to the % display
icon. V1 does not trigger at exactly 0 degrees; it may be a few degrees after ‘0’. The remaining signals (V2,
V3, I1, I2, I3) are sampled when V1 is triggered. In other words, the phase angles for V2, V3, I1, I2, and I3
are sampled with respect to V1. For example, if V1, I1 have a phase difference of 30 degrees, they are
displayed as V1 (2 degrees), I1 (32 degrees) in the harmonics analysis.
NOTE: If the waveform is clipped at the peak or too small in the LCD, press the RANGE button to
select HIGH or LOW range for a better display. The range indicator is the symbol after the unit of
RMS value, Lor H.
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PQ3350 V5.2 11/10
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Measurement of Maximum Demand
1. Set the time interval for maximum demand (refer to section V)
2. The analyzer will integrate the KW and KVA over the specified interval.
3. The maximum demand (MD) updates if new demand is greater than the previous value.
In the following example, the maximum demand is 527.4VA and 527.4W. The time interval for maximum
demand is 2 minutes.
Waveform of Voltage and Current
Press this button to display the waveforms for voltage and current simultaneously.
Press this to select different inputs (V1, I1), (V2, I2), or (V3, I3).
NOTE: The triggering point is the zero crossing point of V1 for V2, V3, I2, and I3. The triggering point
for I1 is its own zero crossing point in case V1 is not present.
NOTE: In the waveform display mode, one period/cycle of 1024 data points is displayed.
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