Infratek 31 Manuel utilisateur

USERS MANUAL MODEL 31

HAND HELD POWER ANALYZER

SINGLE- AND THREE PHASE

INFRATEK

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

1. SAFETY

1.1 Warnings

2. INTRODUCING THE HAND HELD POWER ANALYZER

2.1 Instrument Versions, Options, Accessories

2.2 Specifications

3. MATHEMATICAL DEFINITIONS USED BY THE POWER ANALYZER

4. GETTING STARTED

4.1 Front Panel and Rear Panel

4.2 Line Voltage Selection of the Charger

4.3 Turning the Power Analyzer on

4.4 Using the Function Keys

4.5 Selecting the Correct Current Input

4.6 Taking Basic Measurements

5. OPERATING THE POWER ANALYZER FROM THE FRONT PANEL

5.2 Operating Philosophy

5.3 Operations Controlled by the Side Menus

5.3.1 Current Input Selection

5.2.2 Range Selection, Auto Range Selection

5.2.3 Selecting Synchronization / 2W, 3W Configuration

5.2.4 Selecting Measurement Time and Special Functions

5.2.5 Selecting IEC1000-3-2, or Logging

5.2.6 Selecting Various Display Modes

5.2.7 Selecting the Graphics in the VIEWSUM-Display-Mode

5.3 Operations Controlled by the Bottom Line Menus

5.3.1 Main Menus

5.3.2 Main Menu

<HOLD>

5.3.3 Main Menu

<AC+DC>

5.3.4 Main Menu

<SPLIT>

5.3.5 Main Menu

<VIEW>

5.3.6 Main Menu

<SETUP>

5.4 Operations Controlled by the Numeric Display Field

5.4.1 The Measurement Function Selection Table

5.4.2 Selecting RMS-Values

5.4.3 Selecting Min, MAX, Peak, AND CF

5.4.4 Selecting Power Values

5.4.5 Selecting and Resetting Energy Values

5.4.6 Selecting Mechanical Values

5.4.7 Selecting Frequency

5.4.8 Selecting Power Factor (PF)

5.4.9 Selecting THD (Total Harmonic Distortion)

5.4.10 Selecting FFT Values, Harmonics 1-63

5.4.11 Selecting Magnitude of Impedance 1-63

5.4.12 Selecting Phase Angle of Harmonic Impedance 1-63

6. OPERATING THE POWER ANALYZER USING THE COMPUTER

INTERFACE

6.1 Introduction

6.2 Local and Remote Operations

6.3 RS-232 Computer Interface

6.4 Setting Interface Parameters

6.5 Cabling the Power Analyzer to a Host

6.6 How the Power Analyzer Processes Input

6.6.1 Input Terminator

6.6.2 Sending Commands to the Power Analyzer

6.6.3 How the Power Analyzer Processes Output

6.6.4 Optimizing Speed for Data Transfer

6.7 Operating Several Instruments on RS-232 from one Computer

6.7.1 Status Register Definition

6.8 Computer Interface Command Set

7. THE POWER ANALYZER OPTIONS

7.1 Option 01: RS-232 Interface, and Operating Software

7.1.1 RS-232 Interface and Operating Software

7.2 Option 02: RS-232 Interface, Operating Software Data Logging, and

IEC-Testing

7.3 Option 03: 0-100A Three Phase Current Sensor Module

8. EPROM REPLACEMENT, POWER ANALYZER CALIBRATION

8.1 EPROM Replacement

8.2 Power Analyzer Calibration

8.2.1 Calibration Cycle

8.2.2 Equipment Needed

8.2.3 Preparing for Calibration

8.2.4 Voltage Calibration, Current Calibration, Clamp Calibration

1-1 1-2

1. SAFETY

Before using the Power Analyzer, read the following safety information carefully. In this

manual „WARNING“ is reserved for conditions that pose hazards to the user;

„CAUTION“ is reserved for conditions that may damage your instrument.

!" Avoid working alone.

!Follow all safety procedures for equipment being tested.

!Inspect the test leads for damaged insulation.

!Be sure the Power Analyzer is in good operating condition.

!To avoid electrical shock, use caution when working above 30V dc or rms.

!Disconnect the live test leads before disconnecting the common test leads.

!When making a current- or power measurement, turn the circuit power off before

connecting the Power Analyzer in the circuit.

!Switching on inductive loads means large inrush currents. Take precautions to

avoid overloading the current channels by shorting the start-up currents across the

current inputs.

!Switching off inductive loads or switching on rotating loads means large voltages

or extremely fast changing voltages on the Power Analyzer input terminals. Such

conditions may damage the instrument and are potentially hazardous.

!To comply with EN50081-1 the current- and voltage test leads must form 6

windings through ferrite torroid Siemens B64290-L40-X830 or equivalent. (This

measure will also enhance immunity with respect to fast common mode

transients), the RS-232 interface cable must be shielded and must form 1 winding

through Fair-rite VO 0444176451.

!1kV burst test: use shielded input- and output cables.

!The Power Analyzer complies with the safety standards IEC 1010-1, EN 61010-1.

1.1 WARNINGS

!" Before reading the manual or before using this instrument read carefully the

warnings below and make sure you understand them.

!" WARNING: Line Power

To avoid shock hazard, connect the instrument power cord to a power receptacle

with earth ground.

!" WARNING

The maximum floating voltage above earth ground on the current input terminals

and the voltage Lo-input terminals is 600V. Exceeding these limits poses a hazard

to the meter and operator.

!" WARNING

Qualified personnel must operate this instrument.

!" WARNING

Refer all servicing of this instrument to qualified personnel. Before opening case

disconnect all leads connected to the instrument and finally disconnect the power

line cord.

!" WARNING

The specifications given in this manual solely describe the technical properties of

the instrument. They do not imply any other properties unless it is explicitly said

so.

!" WARNING

Use of this instrument in life support systems and in systems for people

transportation must be expressly authorized.

The manufacturer of this Power Analyzer must sign the authorization.

!" WARNING

Do not operate the front panel keys with pointed objects. A damaged key may

pose shock hazard.

If you observe a damaged front panel key, please report this to your nearest

Infratek representative and return the instrument for repair.

2-1 2-2

2. INTRODUCING THE HAND HELD POWER ANALYZER

WARNING

Read the „Power Analyzer Safety“ in section 1 of this manual before using the instrument.

This 1- and 3-phase Power Analyzer is designed for bench-top, field service, and system

application.

Some features provided by the Power Analyzer are:

!Blue LCD monitor, 108 x 56mm (240x128 pixels).

!Fully menu controlled operation with only 11 soft keys.

!Meter mode and graphics mode.

!Measures and computes all electrical quantities of current, voltage, power, energy

and harmonics of current, voltage, and power simultaneously.

!Frequency measurement 0.1Hz - 50kHz.

!AC-, and AC+DC-coupling for individual quantities.

!Built-in integrator.

!Harmonic Analysis of current, voltage, power, and impedance (Mag. / Phase)

!Bar graph and wave form display.

!Wide voltage- and current range (20mA - 50A).

Depending on instrument version the following additional measurement functions are

available:

!Line-to-line voltage measurement.

!IEC1000-3-2, simultaneous current harmonic testing on three phases supported by

Windows Operating Software.

!Data Logging function supported by windows operating software. Plots of

measured quantities (3 per phase) versus, time of frequency (5Hz - 400Hz) can be

generated and plotted. Maximum values during logging pass are stored and can

be viewed on the display by entering HOLD.

!Motor testing supported by Windows Operating Software. Mechanical input- and

output power, torque, speed, efficiency, are determined.

2.1 INSTRUMENT VERSIONS, OPTIONS, ACCESSORIES

Model 31-1/0.4L Single Phase Power Analyzer, 0.4 % accuracy, saves 12 instrument

settings, battery charger/supply, carrying case, no data logging, no

harmonics

Model 31-1/0.4 Single Phase Power Analyzer, 0.4 % accuracy, saves 12 instrument

settings, battery charger/supply, carrying case, includes harmonics

Model 31-1/0.2 Single Phase Power Analyzer, 0.2 % accuracy, saves 12 instrument

settings, battery charger/supply, carrying case, includes harmonics,

and IEC1000-3-2 testing

Model 31-1/0.1 Single Phase Power Analyzer, 0.1 % accuracy, saves 12 instrument

settings, battery charger/supply, carrying case, includes harmonics,

IEC1000-3-2 testing, and data logging

Model 31-3/0.4L Three Phase Power Analyzer, 0.4 % accuracy, saves 12 instrument

settings, battery charger/supply, carrying case, no line-to-line, no

data logging, no harmonics

Model 31-3/0.4 Three Phase Power Analyzer, 0.4 % accuracy, saves 12 instrument

settings, battery charger/supply, carrying case, includes harmonics

and line-to-line

Model 31-3/0.2 Three Phase Power Analyzer, 0.2 % accuracy, saves 12 instrument

settings, battery charger/supply, carrying case, includes harmonics,

line-to-line, and IEC1000-3-2 testing.

Model 31-3/0.1 Three Phase Power Analyzer, 0.1 % accuracy, saves 12 instrument

settings, battery charger/supply, carrying case, includes harmonics,

line-to-line, and IEC1000-3-2 testing.

Model 31-3/0.1M Three Phase Power Analyzer, 0.1 % accuracy, saves 12 instrument

settings, includes line-to-line, data logging, IEC1000-3-2 testing,

calculation of motor Parameters, RS-232 interface, operating

software under Windows 95, 98, NT, 2000, ME, XP and

charger/supply, carrying case.

2-3

Option 01 RS-232 Interface, external synchronization input, Windows Operating

Software (95, 98, NT, 2000, ME, XP) without data logging capabilities,

without IEC1000-3-2

Option 02 RS-232 Interface, external synchronization input, trigger input, Windows

Operating Software (95, 98, NT, 2000, ME, XP) including software for

high speed data logging, and IEC1000-3-2 testing

Option 03 0-100A three phase current sensor module including supply

Option 04 0-300A, 0-3000A flexible current clamp with connector to clamp inputs of

Power Analyzer (1 per phase), 1 % at 50/60 Hz

ACS1: Current clamp with connector to Model 31 clamp input, 0-200A / 0-1000A

DC-1kHz, 2%

ACS2: Current clamp with connector to Model 31 clamp input, 0-20A / 0-200A,

DC-20kHz, 1%

ACS4: Set of test leads, max. 32A, 1.5m (2 red, 2 black)

ACS5: Clamp input connector

ACS6: Service Manual

ACS7: Official Calibration Certificate from SCS (Swiss Calibration Service)

2-4 2-5

2.2 SPECIFICATIONS

7 ranges: 1 V, 3 V, 10 V, 30 V, 100 V, 300 V, 1000 V

Frequency range: DC-100 kHz Coupling: AC/AC+DC 1 Hz-100 kHz / DC-100 kHz

Crest Factor 3:1 at 50 % full scale Common Mode 50 Hz/100 kHz 130 dB/70 dB

Built-in star point network 500 k

ΩMaximum Input: Hi to Lo/Lo to case 1000 V/600 V

Voltage Accuracy 23

°±

3°K; rms, rdg=reading

1 Hz-1 kHz ±k(0.1 % rdg±0.07 % range)

1 kHz-10 kHz ±k(0.3 % rdg±0.2 % range + 0.02 % / kHz rdg)

10 kHz-100 kHz ±k(0.05 %/ kHz rdg + 0.3 % range)

Accuracy Grades:

k=1, k=2,k=4

10 ranges: 100 mA, 300 mA, 1, 3, 10 A; 1, 3, 10, 30, 100 A. Clamp: 1 A-1000 A

Frequency range DC-100 kHz Coupling: AC, AC+DC 1 Hz-100 kHz / DC-100 kHz

Crest Factor 3:1 at 50 % full scale Common Mode 50 Hz/100 kHz 150 dB/100 dB

3 A input: 3 A cont./10 A 5 s; 50 A input: 40 A cont./50 A 20 s. RI=30 mΩ/3 mΩ

Current Accuracy 23

°±

3°K; rms, rdg=reading, rng=range

50 A/Clamp Input 3 A Input

1 Hz-500 Hz ±k(0.1 % rdg + 0.1 % rng) ±k(0.1 % rdg + 0.1 % rng)

500 Hz-2 kHz ±k(0.6 % rdg + 0.6 % rng) ±k(0.8 % rdg + 0.8 % rng)

2 kHz-10 kHz ±k(0.8 % rdg + 0.8 % rng)* ±k(2 % rdg + 1 % rng)*

10 kHz-100 kHz ±(0.1 %/ kHzrdg + 0.8 % rng)* ±(0.1 %/ kHzrdg + 2 % rng)*

Lowest range multiply percentage figures by 2. *typical

Accuracy Grades

k=1, k=2, k=4.

Currents L1, L2, L3 in

direction for positive power.

70 ranges corresponding to the products of voltage ranges times current ranges.DC-100 kHz

Power

Accuracy 23

°±

3°K; 50 A/Clamp Input, 3 A Input

1 Hz-1 kHz Add accuracy percentage figures of current and

voltage input

1 kHz-100 kHz Add accuracy percentage figures of current and

voltage input, add±2 % (1-PF)/ kHz of range

PF = 0 to±1

Computed

Values

Reactive Power: Var =±(VA2–W2)1/2; Apparent Power: VA=ArmsVrms; Power

Factor: PF=W/VA; Crest Factor: CF=Ap/Arms, Vp/Vrms; Maximum: Ap, Vp;

Minimum:-Ap, -Vp; PtP: Maximum- Minimum; Impedance: Z=Vrms/Arms

ϕ; Total

harm.Dist., THD1=(Irms

2-Ifund2)1/2/Irms, THD2=(I

22+ I32+ ...In2)1/2/Irms.

Add accuracy percentage

figures of values involved in

computation.

Mechanical

Values Total Input Power, Nm/s; Output Power to load, Nm/s; Torque at axis of rotating

machine, Nm; Speed, rpm; Efficiency:Eta = Output Power / Input Power Synchronous machines

only.

Frequency range of fundamental 4 Hz-9 kHz Harmonic 1-63

Accuracy: harmonic current and voltage, same as rms current and rms voltage

Harmonic

Analysis Computed Values: harmonic power; harmonic phase angle (power factor);

harmonic impedance.

Add accuracy percentage

figures of values involved in

computation.

Frequency 2 Hz-50 kHz; A; V:±0.1 %

Integrator Energy, Accuracy Wh, Vah: Basic accuracy of integrated quantity

Data Logging Output values, speed, and duration is programmable; maximum speed: 10 values

from a 3-phase system in 150 ms. Range of signal frequency

5 Hz to 400 Hz

Current

Harmonics Current harmonics in a 3-phase system are determined according to

IEC1000-3-2

Display

Power/Battery

Dielectric

Strength

Dimensions

Display: Blue liquid crystal graphic display with EL backlight

Charger: AC, 50-60 Hz, 115/230 V, 0.2 AF, 10 VA; sealed Lead gel battery, 6

hours

Dielectric Strength: Current inputs to case; Voltage inputs to case; Line input to

case

Dimensions: H x W x D

58x108mm; 128x240 pixels

3 kV; 2 kV; 3 kV 50 Hz/1

min

75x160x245mm; 1.5kg

Options RS-232 Interface

Windows operating software, 95, 98, NT, 2000, ME, XP

Current clamps 0-200 A/0-400 A

3-1 3-2

3. MATHEMATICAL DEFINITIONS USED BY THE

POWER ANALYZER

RMS-value (1/T

∫i2dt)1/2; RMS of total and RMS of every harmonic (1-63)

RMS of line-to-line voltage (1/T

∫(U1-U2)2dt)1/2

Rectified mean 1/T

∫|i |dt

Mean value 1/T

∫i dt

Maximum max. (i) in averaging interval

Minimum min. (i) in averaging interval

Peak-to-peak max. (i) - min. (i) in averaging interval

Crest Factor Maximum / RMS-value

Frequency Number of zero crossings of current or voltage.

Average Power P 1/T

∫u i dt

Apparent Power S RMS current x RMS voltage

Reactive Power Q ±(S2- P2)1/2

Reactive Power 3-phase [(S1 + S2 + S3)2– (P1 + P2 + P3)2]1/2

Power Factor P/S

Power Factor 3-phase system (P1 + P2 + P3) / S1 + S2 + S3)

Energies

∫xdt x = P, S

Total harm. Distortion THD1 (Irms2- Ifund2)1/2/Irms

Total harm. Distortion THD2 Σ(In2)1/2 / Irms; n = 2, … 4Hz to 380Hz

Magnitude of Impedance Mag Vn/In; n = 1, 2, … 63

Phase Angle of Impedance Phase Vn/In; n = 1 →Power Factor of fundamental

Mechanical Input Power Pmin P1 +P2 + P3 [Nm/s]

Mechanical Output Power Pmout P1 + P2 + P3 – Ploss [Nm/s]

Torque applied to load T = Pmout •poles /4 •3.1416 •frequency

Efficiency η= 1 – Ploss / Pmin

Slip S = 1 – fout / fin

Speed (internal) RPM 120 frequency / poles

3W-configuration Average- and sum-value from L1, L2, L3

2W-configuration Average- and sum-value from L1, L2

RMS-, rectified mean-, mean-, maximum-, minimum-, and peak-to-peak values apply

to current and voltage.

Energies apply to real- and apparent power.

Total harmonic distortion applies to current and voltage.

4-1 4-2

4. GETTING STARTED

This section explains how to prepare the Power Analyzer for operation, discusses general

operating features, and explains some common measurements.

4.1 FRONT PANEL AND REAR PANEL

The front panel in figure 4.1 shows the graphic display in its configuration when the

Power Analyzer starts up with a user defined recall number 1-12. The main menus at the

bottom of the display are selected by pressing menu keys M1 through M6. Below the

menu keys are 4 cursor control keys and one “SET” key. The cursor control keys are

used to move the cursor up and down or to the right or to the left.

The basic operations are:

• Move the cursor in the side menu and press “SET”. A pull down menu is

presented to select a new setting.

• Move the cursor right to any display number field and press “SET”. A

measurement quantity selection table is presented to select a new quantity.

Figure 4.1: Power Analyzer Front Panel

The rear panel shown in figure 4.2 contains the input terminals on the left hand side. The

Hi- and Lo-voltage terminals are in the middle. The current input terminals are to the left.

Two red terminals for 3A and 50A and one common Lo terminal. The clamp input is

equipped with a short circuit connector. When not in use, this short circuit connector must

be installed.

The three phase Power Analyzer has the inputs for phase 1 (L1) at the top, phase 2 (L2)

inputs are in the middle, and phase 3 (L3) inputs at the bottom.

On the right hand side of the rear panel is the RS-232 interface connector and next to it

the input for the battery charger / or external supply.

Figure 4.2: Power Analyzer Rear Panel

4.2. LINE VOLTAGE SELECTION OF THE CHARGER

The line operating voltage is factory set. Before operating your Power Analyzer on line

power please check the voltage setting written on the tag above the line receptacle. In

case the voltage does not match the operating voltage of your country the voltage setting

can be changed as shown below:

WARNING

Before changing the internal voltage setting disconnect all electrical connections to the

Power Analyzer.

• Remove all connections to your Power Analyzer.

• Remove the cover of the charger case by removing 4 screws on top of the case.

• Change the jumper setting as shown in Figure 4.3.

4-3 4-4

Figure 4.3: Position of Voltage Selector for 110V and 230V operation.

4.3 TURNING THE POWER ANALYZER ON

Insert the line cord into the receptacle on the charger. It will operate on the line voltage

marked above the line cord receptacle.

Turn on the instrument by activating the on/off-switch located on the front panel.

Alternatively, you can operate the Power Analyzer on the internal batteries without

external supply.

When the instrument is turned on the display is set to its factory start-up configuration

(recall number 00) with most values set to zero for about 2 seconds. The Power Analyzer

assumes its initial setting as follows: the first line of the display number field shows the

RMS current and the RMS voltage. The second line shows power and frequency of

current, and the third line shows apparent power and power factor.

The fourth and fifth lines are graphic area. At start-up the harmonic bar graph of current is

displayed. The horizontal scale is numbered 0-59 referring to the harmonics of current

(N=0 is the DC component) and the vertical scale gives the approximate magnitudes of

the harmonics in mA or A.

Three phase instruments will display values from phase L1.

The side menu shows the following settings:

IN 5A current input 5A (3A)

100mA A 100mA range in auto ranging

1V A 1V range in auto ranging

Syn = I synchronization to current phase L1

>500 ms 500ms measurement time

VIEW L1 displays phase L1 values

The main menus along the bottom side of the display are:





HOLD 



PRINT 



SPLIT 



VIEW 



SETUP 





4.4 USING THE FUNCTION KEYS

Below the display are 2 rows of control keys. The top row contains 6 menu control keys

M1, M2, M3, M4, M5, and M6. The bottom row contains 4 cursor control keys and 1

“SET” control key.

The basic use of the two key control fields is as follows:

The cursor control keys are used to move the cursor to the desired position on the

display. Pressing the SET-key means that you want to modify this position; this can be a

position to the very left of the display (side menu) such as 5A/50A input selection, or

current range- or voltage range selection, or synchronization to I or U (current or voltage

of phase L1), or selection of averaging time, or selection of phase L1, L2, L3, SUM, or

ALL display.

When you move the cursor to the display number field the display can be reconfigured,

that is, you can place at the selected position a different quantity.

The menu control keys M1 through M6 go with the 6 menus shown along the bottom of

the display. These menus are dynamically changing, depending on the cursor position

and other action you may take.

4.5 SELECTING THE CORRECT CURRENT INPUT

Before you apply current to the input terminals of the Power Analyzer you must know the

approximate maximum rms value that will flow. Select the appropriate current input IN 5A

or IN 50A. If you are in doubt select the IN 50A or even use current transducers.

Position of Voltage Selector

for 110V/60Hz operation

(use pin in the middle and to

the left)

Voltage Selector set for

230V/50Hz operation

(use pin in the middle and to

the right)

4-5 4-6

This is how you select the desired current input. Move the cursor to the top of the side

menu, press “SET”. The current input selection pull down menu appears: IN 5A / IN 50A /

CLAMP. Move the cursor to the desired input and press “SET”. The side menu now

shows the current input.

4.6 TAKING BASIC MEASUREMENTS

The following procedures describe the basics of taking common power measurements

operating the Power Analyzer from the front panel. This information is provided for the

user who needs to get started quickly.

WARNINGS

!Read the Power Analyzer safety before operating this instrument.

!Make sure when wiring the Power Analyzer in a circuit that you are using the

current input (5A or 50A) you have selected with the front panel controls.

!To avoid electrical shock or damage to the Power Analyzer, do not apply more

than 850V peak between any terminal and earth ground.

The user should be well aware of the fact, that switching off inductive loads may

generate extremely fast and high voltage transients exceeding above limits.

To measure voltage, current, power and related quantities in a 3-phase circuit

connect the test leads as shown in figure 4.4 and follow the procedure described

below.

Figure 4.4: Wiring of the Power Analyzer in a 3-phase 4-wire circuit.

The 3-Wattmeter connection is used. Total Power = P1+P2+P3.

If no neutral is available leave voltage Lo unconnected.

(Frequency inverters, star point network 500kΩis built in)

• Turn off power in the circuit to be measured.

• Break the circuit in each phase and connect phase L1 to the current input 1, phase L2

to current input 2, and phase L3 to current input 3. The current flows from source to

load; as a consequence you must connect the Hi current inputs to the source side and

the Lo current inputs to the load side.

• L1, L2, and L3 are also connected to the Hi voltage inputs. The Lo voltage input

terminal is connected to neutral in a 4-wire circuit. If you have no neutral available (3-

wire circuit) connect the voltage Lo-terminal to the grounding post on the Power

Analyzer, or alternatively, leave it open (star point network is built in the instrument).

• Switch on the Power Analyzer (it will be in automatic ranging). Select the correct

current input IN 5A or IN 50A as described in 4.6.

• Turn on power to the load under test.

• The Power Analyzer will automatically select the voltage range and displays the

following six electrical quantities (display top to bottom) RMS-current, RMS-voltage,

power, frequency, apparent power, and power factor of phase L1.

The bar graph of current shows the harmonic content of phase L1.

• Use the side menu to display values from phase L2, L3, SUM, and ALL.

TO LOAD

50A 3A Lo

CURRENT VOLTAGE

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