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PQ3350
User Manual
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Extech Instruments PQ3350 User Manual

User Manual
Power and Harmonics Analyzer Model PQ3350
PQ3350 V5.2 11/10
2
EN 61010-2-032 CAT III 600V
Pollution Degree 2
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 analy zer 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 rea ding 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.
PQ3350 V5.2 11/10
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Table of Contents
Preparat ion fo r use........................................................................................................11
Power Q uality o f a 3 P hase 4 W ire ( 3P4W) Syste m.................................................13
Power Q uality o f a 3 P hase 3 W ire ( 3P3W) Syste m.................................................13
Power Q uality o f a Sin gle Ph ase (1P 2W) Sy stem.....................................................15
Power Q uality o f a 1 P hase 3 W ire ( 1P3W) Syste m.................................................16
Measurement of a System with C T or VT (PT)........................................................17
Harmonic Analysis of Voltage or Current..................................................................18
Di s p la y t h e P h a s e A ngle of Harm onics......................................................................19
Measurement of Maximum Dem and.........................................................................20
W avef orm of Voltage and C urrent..............................................................................20
W avef orm for Voltage Only........................................................................................21
Graphic Ph ase Dia gram...............................................................................................21
Phase Sequence of a 3 P hase S ystem.........................................................................23
Balanced and Unba lanced 3 Pha se (3P3W, 3P4W) Power So urce System ............23
Balanced and Unba lanced 3 Pha se (3P3 W or 3P4 W) Load Sy stem.......................24
Transi ent Capture ( Dips, Swe lls, O utage)..................................................................25
Down Loa d T ra nsient Data.........................................................................................27
Datalogging Power Da ta (3P4W, 3P3W , 1P2 W , 1P3W).........................................27
Down Loa d Powe r Data..............................................................................................27
Data Logging H armonics Data...................................................................................28
Down Loa d Harm onics Da ta......................................................................................28
Clear Mem ory o f Data.................................................................................................28
HardCOP Y of SC REEN.............................................................................................29
READ the S AVED SCREEN.....................................................................................30
SET THE CT AN D VT (PT ) RATIO........................................................................31
SET THE TIME I NTERV A L FOR M AXIMUM DEMAN D...............................32
SET T HE SAMPLING TIME FOR DAT A LOGGING.........................................33
SET THE C ALENDE R CLOC K..............................................................................34
PROTOCOL (R S-232C INTE RFACE)....................................................................34
SPECIFICATIONS (23°C± 5°C) ........................................................................35
PQ3350 V5.2 11/10
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FEATURES
■ Analysis for 3P4W, 3P3W , 1P2W , 1P3W
■ True RMS value (V
123
and I
123
)
■ Active Power (W, KW , MW , GW)
■ Apparent and Reactive Power (KV A, KV AR)
■ Power Factor (PF), Phase Angle (Φ)
■ Energy (WH, KWH, KV ARH, PFH)
■ Current measurement from 0.1mA to 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 W aveform
■ Maximum Demand (MD KW, MW , KV A, MVA) with Programmable Period
■ Harmonic Analysis (V
123
and I
123
) to the 99th Order
■ Display of 50 Harmonics in one Screen with Waveform
■ Display of Waveform with Peak V alues (1024 Samples / Period)
■ Analysis of Total Harmonic Distortion (THD-F)
■ Graphic Phase Diagram with 3 Phase System Parameters
■ Capture 28 Transient Events (T ime + Cycles) with Programmable Threshold (%)
■ DIP, SWELL, and OUT AGE are included in transient events.
■ 3 Phase Volt age or Current Unbalanced Ratio (VUR, IUR)
■ 3 Phase Volt age 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
PQ3350 V5.2 11/10
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PANEL DESCRIPTION
POWER
V1
V2
V3
I1
I3
I2
12
3
4
5
6
7
8
9
1
0
1
1
12
PQ3350 V5.2 11/10
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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
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.
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. Jaw Assembly
2. Trigger
3. Range Selector
4. 6 pin mini DIN connector
NOTE: T o choose the 100A current 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. Jaw Assembly
2. Trigger
3. Range Selector
4. 6 pin mini DIN connector
NOTE: T o select the1000A current 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
PQ3350 V5.2 11/10
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Flexible Current Probe (3000A or 1 200A)
1. Control Box
2. Output Range Select Switch
3. Flexible Loop
4. Coupling Assembly
NOTE: T o select the 3000A flexible current probe, press the SETUP button to select CLAMP. When the CLAMP is reverse video, press the ▲ or ▼ button to select 3000.
NOTE: T o select the 1200A flexible current probe, press the SETUP button to select CLAMP. When the CLAMP is reverse video, press the ▲ or ▼ button to select 1200.
WARNING: All the current 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
PQ3350 V5.2 11/10
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OPERATING INSTRUCTIONS
NOTE: Pay special attention to the flexible current probe connecion s.
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: A lways wear appropriate gloves in operation.
NOTE: Select the correct CLAMP in 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.
PQ3350 V5.2 11/10
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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 its value.
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 1
st
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).
1
2
3
4
5
6
7
8
9
10
11
12 13 14 15 16 17
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 1Φ3Φ buttons 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 V
N
(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
PQ3350 V5.2 11/10
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a. Turn the po wer on. Press the POWER and the 1Φ3Φ buttons 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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