LMG500

Multi Channel Precision Power Meter LMG500

LMG5

00 e

12.

04

The New Dimension of

Power Measuring

0,03% Accuracy • 10MHz Bandwidth • 3MSamples/s Sampling and Evaluation Absolutely Non Gapping

All Inrush Currents and Signal Changes will be Captured

Advanced Test Equipment Rentalswww.atecorp.com 800-404-ATEC (2832)

®

Established 1981

• For use in all applications

• Measuring inputs for ultimate requirements

• All inputs isolated against each other and against earth (1000V/CAT III) • Gap free sampling and evaluation with 3MSamples/s at any duration • Up to 8 power measuring channels in synchronous 3MHz sampling made up with two LMG500

• Separated HF current inputs IHF*: 20mA to 3A/DC to 5MHz

• Capacity to earth <20pF

• Current inputs I*, high dynamic of range: 20mA to 32A/120Apeak

by only one socket pair No need and incommode change of external shunts!

• Voltage inputs U*: 3V to 1000V/3200Vpeak

• Measuring with external sensors: Inputs ISensor and USensor 30mV to 4V/DC to 10MHz

• Auxiliary voltage ±15V and Identification of external sensors

General Information The Precision Power Meter LMG500, modular for 1 to 8 power channels (phases), designed with most advanced technologies will give best measuring results with all applications, conventional devices as motors and trans-formers, as well as with equip-ment designed in sophisticated power electronics as inverters, lighting and automotive com-ponents.

The LMG500 performance is based on and featured by

• its measuring bandwidth from DC to above 10 MHz. Pulsed signals with less than 100ns duration will be captured and measured most precisely.

• its high sampling rate of 3 MSamples per second, synchronous and simul- taneous at all channels non-gapping, so all steady state as well as dynamic

events can be measured and analysed. For the computa- tion of rms and average values all data of the continuous 3 MHz-sampling will be used, thus preventing any gaps between those values. This non-gapping sampling and computing technology guarantees highest precision also at fast signal changes.

• its high common mode rejec- tion due to minimisation of all parasitic infl uences.

• low earth capacities down to their physical limits (less than 20pF) yielding a negligible impact of measuring device onto the measuring object.

• very high precision at low cosphi, e.g. down to 0.001 at 50Hz, is inherent in the instrument due to bandwidth and precisely matched delays of U and I channel. The guar-

anteed accuracy is mainly determined by the calibration procedure and used stan- dards. The usable accuracy can be amended by more laborious calibration and better standards. The trace- able measuring of trans- former effi ciency needs an amended calibration at low power factor, ZES ZIMMER Part No. KR-L50-LPF.

ZES ZIMMER’s experience and skill to design easy to use ergonomic operation shells give LMG500 another pole position. The graphical display gives real time visualisation of the measurement with fi gures and graphs.

The powerful transfer and evaluation software TERM-L5 for your PC is another powerful tool for analysis.

Software PQA enables an easy and effi cient analysis of power quality.

Easy operation by use of colour graphics display and hotkeys for important measured values

Various value tables can be called onto the colour graph-ics display by pressing one key only, either with 6 values in large letters, which can also be read at a glance from a greater distance, with 12 values or with

up to 40 values e.g. in range setting or in harmonics table.

The graphics display allows scope and plot functions for waveform and timing diagrams, as well as xy diagrams or bar charts for the harmonics. The status bar at the top of each display menu shows the input level of the

4 (8) voltage and the 4 (8) current inputs – an important item of information for the quality of the measurement. The display also indicates in what groups, A and B (C and D), the input channels are wired and which signals the groups are synchronised to.

Channel 1 with 11 measuring values Range setting and scaling

Scope function for waveform of sampling values Plot function of calculated values

Status line, e.g. with 4 power channels

Precise Power Measurement – this associates with the famous Precision Power Meter series LMG of ZES ZIMMER.

The LMG series is that successful, approved and keeps state of the art by continuous research and development by the ZES ZIMMER engineering staff.

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Measurements with up to 8 power channels

The following block diagram applies wiring A:1+2+3 B:4 and is typical for a low power speed

8 channel measuring at uninterruptible power supply with intermediate DC link

variable drive. This example is used to explain the settings and displays of the LMG500.

Arrangement of measurement example described with the screenshots below

Setting of global parameters, e.g. wiring

Conditioning of measuring signal, setting of sychronisa-tion source for group A

Conditioning of measuring signal, setting of sychronisa-tion source for group B

Measuring ranges, “autorange” or “manual”, setting of scaling factors for current and voltage of group A

Measuring ranges, “autorange” or “manual”, setting of scaling factors for current and voltage of group B

Recognizing, displaying and activation of connected external current sensor devices

1

3

4

5

6

2

Example for a measuring with 8 power channels: Uninterruptible power supply with intermediate direct current link, determination of efficiencies at different states.

Efficiency at asychronous in- and output (measurement example)

The screenshots were made with the free software BMP2PC from ZES ZIMMER.

15

7 8

9 10

11 12

13 14

16

Wave form (scope menue) of power (yellow), current (red) and voltage (green) of the frequency converter single phase input

Wave form of the low pass filtered 3φ output, the chopper frequency is no more contained because of being outside the filtered range

Large display with 6 important values of the frequency converter input, measured in group B

Phase values and summing values of the frequency converter 3φ output gives a quick overview (group A)

Efficiency, slip, speed and other interesting values, calculated with formula editor programmed for this purpose

The formula editor provides the individual calculations shown in picture

Vector display of 3φ systems immediately checks the phase sequence and shows phase interchanges

Plot display works like a strip chart recorder and can plot all measured or formula calculated values (trend)

Harmonic analysis according to CE standards

Frequency spectrum for current, voltage (as bar chart), with CE-limits, linear or logarithmic

7

8

9

10

11

12

13

14

15

16

11

3f=var

1f=50HzL

N

VU4

AI4

A

VU1

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Motor

AI1

VU3VU2

AI2

All necessary functions in the basic device: - Printer interface - RS232 interface - Formula editor - 3,5” Floppy drive

All necessary functions are included in the basic device at reasonable price: Printer and RS232 interfaces, formula editor and a 3,5” floppy drive.

Formula editor: the window shows some of the available mathematical formulae, functions and logical conditions

Program example for the monitoring of overvoltage and undervoltage

Options:

The LMG500 can be expanded with the options mentioned here. The IEEE488 interface (Part No. L50-O1) is able to interpret the complete SCPI as well as the LMG500-specific command set. It has a data rate up to 1 MByte/sec. The Flicker measurement (Part No. L50-04) option con-sists of a flicker meter in ac-cordance with EN61000-4-15, and signals are evaluated in accordance with EN61000-3-3.

Besides the current/voltage inputs for power measurement, further analog and digital meas-uring inputs and signal outputs are available in the so-called Process signal interfaces, digital and analog inputs and outputs (Part No. L50-O3). Process magnitudes such as rotational speed and torque can be fed to the device to deter-mine the efficiency level, using the formula editor. Signals can be derived from the measured values and can be output again as control signals. The Harmonics up to 99th from U, I and P (Part No. L50-O8)

Options - Star-Delta Conversion Part No. L50-O6

For detailed test and evalua-tion of 3φ motors the electrical quantities for each winding phase are needed. In some cases you have access to the motor terminal block with start and end of all three windings. Then you can meas-ure all what you need. But in most cases the motor has only

3 terminals and the internal star point or the delta winding as to measure its current is not accessible. Also far away from the motor you have only the three wires. With the option star-delta con-version you have the capability to calculate the not accessible values (e.g. voltages, currents,

power, harmonics). This intelli-gent solution with an additional DSP works well at all wave forms and every unbalance of mains and load. Simply connect the voltage paths in delta and click the current clamps around the wires. Select the internal connection of your load and press the „Link“ softkey.

50Hz -> f=variable, instrument for motor measurement in I∗ U∆ wiring

Calculation of the real values in the star connected winding phases (wiring: 3+1, U∆ I∗ -> U∗ I∗)

Calculation of the real values in the delta connected winding phases (wiring: 3+1, U∆ I∗ -> U∆ I∆)

option can be used to analyse current, voltage and power, related to the fundamental ranging from 0.1Hz to 150kHz. It is possible to detect Inter-harmonics by a selectable divi-sion factor giving a new funda-mental as reference. Harmonic analysis up to 1.5MHz possible on external PC with ZES ZIMMER software TERM-L5. CE-Harmonics (Part No. L50-O9) up to 40th acc. to EN61000-3-2. DSP Modules (Part No. L50-O10) One piece necessary for operating with options CE-harm L50-O9, and/or flicker L50-O4

and/or Harm 99 L50-08. Two pieces necessary for oper-ating the above mentioned op-tions in combination with star to delta conversion L50-O6. The respective quantity of DSP modules has to be doubled in case a second LMG500 or the Extension box (Part No. LMG500-E) is connected. The Transients (Part No. L50-O5) option detects peaks and dips up to a resolution of 330ns, sampling with 3 MSamples/s.

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Group A(C) Group B(D)

4 independent power measuring channels, extendable to 8 channels with extension box or second device

The current and voltage paths of the 4(8) power measuring channels are all isolated to each other and to earth. This allows a high degree of measuring freedom in many different power measurement applications.

Wiring settings in () are featured by option „Star-Delta Conversion“

The adjacent table shows various types of wiring for grouped and individual meas-urement channels. The table also assigns application exam-ples for the respective types of wiring. Power measurement channels 1(5) and 4(8) can each be synchronised to their input sig-nals (fundamental waves etc.) independent of each other. Channels 1(5) and 4(8) are then the synchronisation references for the other channels con-tained in groups A(C) and B(D). This is a very useful method for carrying out efficiency meas-urements for equipment where input and output have different frequencies, for example a 3-phase frequency inverter with single-phase mains supply, or uninterruptible power supplies by use of 8 power measurement channels.

Technical Data

Voltage measuring ranges U* Nominal value /V 3 6 12.5 25 60 130 250 400 600 1000 Maximum trms value /V 3.6 7.2 14.4 30 60 130 270 560 1000 1000 Maximum peak value for full scale /V 6.25 12.5 25 50 100 200 400 800 1600 3200 Input impedance >4.5MΩ || <3pF

Current measuring ranges I* Nominal value /A 20m 40m 80m 150m 300m 600m 1.2 2.5 5 10 20 32 Maximum trms value /A 37m 75m 150m 300m 600m 1.25 2.5 5 10 20 32 32 Maximum peak value for full scale /A 59m 117m 234m 469m 938m 1.875 3.75 7.5 15 30 60 120 Input impedance 560mΩ 68mΩ 8.2mΩ 1mΩ

Current measuring ranges IHF* Nominal value /A 150m 300m 600m 1.2 Maximum trms value /A 225m 450m 900m 1.8 Maximum peak value for full scale /A 325m 650m 1.3 2.6 Input impedance 0.1Ω

Sensor inputs USensor,ISensor Nominal value /V 30m 60m 120m 250m 500m 1 2 4 Maximum trms value /V 37m 75m 150m 300m 600m 1.2 2.5 5 Maximum peak value for full scale /V 63m 125m 250m 500m 1 2 4 8 Input impedance 100kΩ || 34pF

Measuring accuracy Accuracies based on: 1. sinusoidal voltage and current 4. definition of power range as the product of 2. ambient temperature 23 °C current and voltage range, 0 ≤ IλI ≤ 1, (λ=Power factor=P/S) 3. warm up time 1h 5. calibration interval 12 month Other values All other values are derived from the current, voltage and active power values. Accuracies for derived values depend on the functional relationship (e.g. S = I * U, ∆S/S = ∆I/I + ∆U/U)

Accuracy ± (% of measuring value + % of measuring range)DC 0.05Hz..45Hz 45Hz..65Hz 65Hz..3kHz 3kHz..15kHz 15kHz..100kHz 100kHz..500kHz 500kHz..1MHz 1MHz .. 3MHz 3MHz .. 10MHz

Voltage U* 0.02+0.06 0.02+0.03 0.01+0.02 0.02+0.03 0.03+0.06 0.1+0.2 0.5+1.0 0.5+1.0 3+3 f/1MHz*1.2 + f/1MHz*1.2Usensor 0.02+0.06 0.015+0.03 0.01+0.02 0.015+0.03 0.03+0.06 0.2+0.4 0.4+0.8 0.4+0.8 f/1MHz*0.7 + f/1MHz*1.5 f/1MHz*0.7 + f/1MHz*1.5

Current I* (20mA .. 5A) 0.02+0.06 0.015+0.03 0.01+0.02 0.015+0.03 0.03+0.06 0.2+0.4 0.5+1.0 0.5+1.0 f/1MHz*1 + f/1MHz*2 -I* (10A .. 32A) 0.02+0.06 0.015+0.03 0.01+0.02 0.015+0.03 0.03+0.06 0.3+0.6 f/100kHz*0.8 + f/100kHz*1.2 - - -I HF 0.02+0.06 0.015+0.03 0.01+0.02 0.015+0.03 0.03+0.06 0.2+0.4 0.5+1.0 0.5+1.0 f/1MHz*1 + f/1MHz*2 -I sensor 0.02+0.06 0.015+0.03 0.01+0.02 0.015+0.03 0.03+0.06 0.2+0.4 0.4+0.8 0.4+0.8 f/1MHz*0.7 + f/1MHz*1.5 f/1MHz*0.7 + f/1MHz*1.5

Power U* / I* (20mA .. 5A) 0.032+0.06 0.028+0.03 0.016+0.02 0.028+0.03 0.048+0.06 0.24+0.3 0.8+1.0 0.8+1.0 f/1MHz*3.2 + f/1MHz*2.5 -

U* / I* (10A .. 32A) 0.032+0.06 0.028+0.03 0.016+0.02 0.028+0.03 0.048+0.06 0.32+0.4 f/100kHz*1 + f/100kHz*1.1 - - -

U* / I HF 0.032+0.06 0.028+0.03 0.016+0.02 0.028+0.03 0.048+0.06 0.24+0.3 0.8+1.0 0.8+1.0 f/1MHz*3.2 + f/1MHz*2.5 -

U* / I sensor 0.032+0.06 0.028+0.03 0.016+0.02 0.028+0.03 0.048+0.06 0.24+0.3 0.72+0.9 0.72+0.9 f/1MHz*3 + f/1MHz*2.3 f/1MHz*1.5 + f/1MHz*1.4

U sensor / I* (20mA .. 5A) 0.032+0.06 0.024+0.03 0.016+0.02 0.024+0.03 0.048+0.06 0.32+0.4 0.72+0.9 0.72+0.9 f/1MHz*1.4 + f/1MHz*1.8 -

U sensor / I* (10A .. 32A) 0.032+0.06 0.024+0.03 0.016+0.02 0.024+0.03 0.048+0.06 0.4+0.5 f/100kHz*1 + f/100kHz*1 - - -

U sensor / I HF 0.032+0.06 0.024+0.03 0.016+0.02 0.024+0.03 0.048+0.06 0.32+0.4 0.72+0.9 0.72+0.9 f/1MHz*1.4 + f/1MHz*2 -

U sensor / Isensor 0.032+0.06 0.024+0.03 0.016+0.02 0.024+0.03 0.048+0.06 0.32+0.4 0.64+0.8 0.64+0.8 f/1MHz*1.12 + f/1MHz*1.5 f/1MHz*1.12 + f/1MHz*1.5

ZES ZIMMER Electronic Systems GmbHTabaksmühlenweg 30, D-61440 Oberursel/Ts.Tel. +49 6171 628750 Fax +49 6171 52086

www.zes.com • sales@zes.com

Subject to technical changes, especially to improve the product, at any time without prior notification.

Isolation All current and voltage inputs isolated against each other, against remaining electronic and against earth (1000V/CATIII)

Synchronization The measurement is synchronized on the signals period. There is a choice to determine the period from „line“, „extern“, u(t), i(t) as well as their envelopes, combined with settable filters . By this very stable readings are achieved, even at signals of pulse width modulated frequency inverters and amplitude modulated electronic ballasts.

Harmonic analysis Measuring of current and voltage with evaluation in full compliance with EN61000-3-2 (option CE Harm L50-O9)

Harmonic analysis Analysis of current, voltage and power up to 99th harmonics, in total 100 harmonics including DC component. (option Harm100 L50-O8) Fundamental in the range from 0.1Hz to 150kHz. By integer divider (1...128) a new reference fundamental can be created as to detect interharmonics. Externally on PC up to 1.5Mhz with ZES ZIMMER software TERM-L5Flicker measuring (option L50-O4) Flicker meter according to EN61000-4-15 with evaluation in full compliance with EN61000-3-3

Transients (option L50-O5) Detecting and recording of transients >330ns

Scope function (standard) Graphical representation of sampled values versus time

Plot function (standard) Time diagram of max. 4 readings, minimal resolution 50ms, respectively 10ms in 50Hz half-wave (flicker) mode

Star delta conversion (option L50-O6) Sums and differences between channels on sample basis

Computer interfaces RS232 (standard) and IEEE488.2 (option L50-O1), only one interface can be used at the same time, additional USB 2.0 Typ B and Ethernet 10/100 Base-T RJ45 (option L50-O2) available. Remote control All functions can be remote-controlled, keyboard lock for measuring parameters Output data Output of all readings, data formats BIN/ASCII, SCPI command set Transfer rate RS232: max.115200 Baud, IEEE488.2: max. 1MByte/s

Floppy drive (standard) 3.5’’, 1.44MB

Printer interface (standard) Parallel PC-Printer interface with 25-pin SUB-D socket, printing measuring values, tables and graphics to matrix, inkjet or laser printers

Processing signal interface 2 x 25 pin SUB-D socket with: (option L50-O3) • 8 analog inputs for process magnitudes (16Bit, ±10V) • 8 analog outputs (16Bit, ±10V) • 8 digital inputs • 8 digital outputs • 2 input for frequency (0.1Hz...500kHz) and rotation direction • in- and outputs are isolated against other electronics (test voltage 500V)

Other data Dimensions • Bench case, W 433mm x H 147mm x D 400mm • Accessories: brackets for 19‘‘ rack, 84PU, 3HU, D 400mm Weight about 12kg Protection class EN61010 (IEC61010, VDE0411), protection class I, overvoltage category III Electromagnetic compatibility EN50081, EN50082 Protection system IP20 in accordance to DIN40050 Operating/storage temperature 0...40°C, -20...50°C Climatic class KYG in accordance to DIN40040 Power supply 85...264V, 47...440Hz, about 100W

Adapter for 3-phase measurements Part No. LMG-MAK3

• CEE-Plug, 5 pins, 16A, 2m supply cord • CEE-Socket, 5 pins, 16A, for EUT • Socket for supplying the meter LMG500/LMG450 • 4mm safety sockets, measuring access to current and voltage • Safety acc. IEC61010: 300V/CATIII

Longtime Data Logging NDL5 Part No. NDL5

• Longtime-data logging to harddisk for LMG500/LMG450/LMG95, configuration with ZES ZIMMER software TERM-L5 • Communication via Internet/Ethernet, even when recording • Uninterruptible power supply integrated • W 320mm x H 50mm x D 307mm

LMG500 application software (Name of software is equal with Part No. Please request detailed data sheets)

TERM-L5 Individual configuration of measurement, using all features of the LMG500, spectral analysis, remote of LMG500

PQA Software especially designed for power quality analysis (e.g. EN50160), easy configuring of measurement in a few steps

SYS61K-3-SOFT Control and evaluation software for test systems of harmonics and flicker according to EN61000-3-2/-3

„Plug N‘Measure“ current sensors

Part No. PSU600-L50 Part No. L45-Z06, -Z07, -Z10, -Z11, -Z16, - Z17, -Z26, -Z28, -Z29, -Z32, all to be used with LMG500 by means of adapter L50-Z14 (Please ask for special datasheets!)