Extech PQ3350 Operating Manual

User Manual

Power and Harmonics Analyzer

Model PQ3350

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 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.

PQ3350 V5.2 11/10

Table of Contents

Preparation for use........................................................................................................ 11

Power Quality of a 3 Phase 4 Wire (3P4W) System................................................. 13

Power Quality of a 3 Phase 3 Wire (3P3W) System................................................. 13

Power Quality of a Single Phase (1P2W) System.....................................................15

Power Quality of a 1 Phase 3 Wire (1P3W) System................................................. 16

Measurement of a System with CT or VT (PT)........................................................ 17

Harmonic Analysis of Voltage or Current ..................................................................18

Display the Phase Angle 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 Load Transient 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

HardCOPY of SCREEN............................................................................................. 29

READ the SAVED SCREEN.....................................................................................30

SET THE CT AND VT (PT) RATIO ........................................................................31

SET THE TIME INTERVAL FOR MAXIMUM DEMAND............................... 32

SET THE SAMPLING TIME FOR DATA LOGGING......................................... 33

SET THE CALENDER CLOCK.............................................................................. 34

PROTOCOL (RS-232C INTERFACE) .................................................................... 34

SPECIFICATIONS (23°C± 5°C) ........................................................................35

PQ3350 V5.2 11/10

FEATURES

■ Analysis for 3P4W, 3P3W, 1P2W, 1P3W

■ True RMS value (V

■ Active Power (W, KW, MW, GW)

■ Apparent and Reactive Power (KVA, KVAR)

■ Power Factor (PF), Phase Angle (Φ)

■ Energy (WH, KWH, KVARH, 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 Waveform

■ Maximum Demand (MD KW, MW, KVA, MVA) with Programmable Period

■ Harmonic Analysis (V

■ 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

PANEL DESCRIPTION

POWER

PQ3350 V5.2 11/10

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

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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Current Probe (100A)

WARNING:

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

All the current probes connected to the power analyzer must be of the same

100A

(HARMON)

100A

(POWER)

60A

10A

(HARMON)

10A

NOTE: To 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

1000A

100A

10A

NOTE: To select the1000A current probe, press the SETUP button to select CLAMP. When the

CLAMP is reverse video, press the ▲ or ▼ button to select 1000.

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Flexible Current Probe (3000A or 1200A)

1. Control Box

2. Output Range Select Switch

3. Flexible Loop

4. Coupling Assembly

NOTE: To 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: To 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.

PQ3350 V5.2 11/10

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 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

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

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 13 14 15 16 17

downloaded file.

PQ3350 V5.2 11/10

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

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

(Neutral) of the

PQ3350 V5.2 11/10

a. Turn the power 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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