Power Fault Recording Power Network Analysis E-Mobility

1www.dewetron.com/power-measurement

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Power MeasurementDEWE-PM

In times of power electronics power measurement is not only a multiplication of current and voltage but primarily an analysis of interfering high-frequency and broadband signals. Sinusoidal qualities, as once electric current and voltage, are displaced by pulse packages; power ratings do not have only 50 or 60 Hz any longer.

Beside the calculation of power for the fundamental oscillation and all signals, questions of harmonics, sym-metries, flickers and start-up processes arise.

Switching frequencies of drive mechanisms having several kHz require sampling rates of several hundred kHz and analogical bandwidths of input amplifiers. The demand of preciseness is far below 0.1 % and this should preferably be the case in the entire frequency spectrum and amplification range.

Applications

Wideband power analysis

Engine test benches

Transformer tests

RPM (rotation per minute) and torque measurement

Determination of efficiency factor

Harmonics analysis

Record of dynamic processes

Streaming up to 1 Msamples/s

Examination of rotating field

Hybrid cars and alternative drive systems

A u t o m o t i v eE n e r g y & P o w e r A n a l y s i sA e r o s p a c e & D e f e n s eTr a n s p o r t a t i o nG e n e r a l Te s t & M e a s u r e m e n t

Power Measurement

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U-moduleDAQP-HV

I-moduleDAQP-LV

A/D1 Msamples/s

POWERmoduleDEWESoft

n, M

CAN

VIDEO

CPU

DEWE-xxx-PM

Math.functions

M 3~

3~

f

Grid

P, Q, S, ...

FFT

Symmetrical components

High-speed recording (Streamer)Long term recording (Logger)

n, M, ω, η


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?? ?? ?

DEWETRON Power Measurement

Have you ever thought about the complex mechanism of statements like P=U*I*cosPhi? Have you ever thought about the meaning of the current being a sinus? Do you even know the velocity of voltage? Does it even have a velocity (= frequency)?

Or is it wiser to say that voltage has many velocities (frequencies)? Isn’t it more adequate to say that current does not only have one sinus but a number of sinusoidal oscillations (harmonics)? Isn’t it also adequate to say that power is the sum of all products of current, voltage and phase angle?

And this brings us right to the discussion: What is happening to all these products? Parts with the same frequency can reach effects (active power) or only help to build up a magnetic field (reactive power). Some are necessary for the powering of electrical motors (fundamental oscillations) and some products result from the multiplication of components with different frequencies (distortion power).

Additionally, the question arises how high-frequent the analysis of the components of the electrical system has to be. If we talk about pulse-wide modulated drives, we have sampling rates in the range of above 10 and 100 kHz.

Questions over questions ….

But fortunately you do not have to worry about how to measure these things. We have already done that for you and products of DEWE-PM series do not only have power measurement but also modules for harmonics analysis, sym-metrical components and flickers. Long-term recordings as well as quick sampling rates for the examination of e.g. start-up procedures are possible.

Power Measurement

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DEWESoft POWER Measurement Software The option POWER for the DEWESoft (DEWESoft-OPT-POWER) is an absolutely high-performance tool for the calcu-lation of power and other similar parameter – the capacity to multiply current and voltage is not the only feature it has. This toolbox is an excellent combination of many features and nearly all applications can be realised by using DEWETRON equipment.

Beside the exact calibration the frequency calculation is a central feature of this software. 50 Hz and 60 Hz are a must – for us also 16.7, 400 and 800 Hz as well as DC and variable frequencies (driver) are a necessity. Due to the high acquisition rate (mainly dependent on the AD card in use, up to 1 MS/s) and the DAQP-HV-S3 module there is no limitation of the acquisition of PWM drivers (700 kHz electrical bandwidth) and the calculation of active and reac-tive power, power factor etc … The toolbox with power quality parameters such as harmonics, interharmonics, THD, symmetric components, flicker and its combination with numerous trigger possibilities make the equipment a power analyser with nearly no limitations. Several screen elements such as vectorscopes, harmonics monitor, oscilloscope and diagrams allow a perfect online visualisation of the data.

The integration of counter inputs, video and CAN-bus offers additional data sources. The mathematical library addi-tionally offers the possibility to calculate parameters such as torque and angular velocity, or even determine the efficiencies online.


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Power Calculation P, Q, S, D

CosPhi, power factor

P, Q, cosPhi for each harmonic

Symmetrical components (positive, negative and zero sequence

components); U, I, P, Q, cosPhi; from 10 period values and period values

Period values (½ cycle, cycle, overlapping, 1 ms sliding, ...)

Frequency CalculationThe software PLL guarantees a very accurate frequency calculation (mHz). On one system multiple power systems can be measured and each can have its own frequency. With the use of the different instruments from DEWESoft the values can be shown in several ways.

Calibration/AccuracyThe high accuracy of the calculation can be reached because of the calibration function in the frequency domain. With this unique technology amplitude and phase can be corrected for the full frequency range from DC up to what-ever the hardware can sample (kilosamples up to megasamples per second). All internal curves like filter response or multiplexer shift are corrected inside the software and the sensor database includes correction curves for each clamp, rogowski coil, transformer or which sensor ever is used.

Scope Selectable graphs

U1, U2, U3, U12, U23, U31: Line to line and line to earth voltages are supported

Up to 8 graphs in one diagram

Zoom in and out are supported online

Waveforms can be stored

Vector Scope Vector scope for 3 phase systems

Each individual harmonic can be shown

More vector scopes can be displayed on one screen

Different power systems can be shown on one screen

With the “transparent” function direct comparisons of phasors are possible

Recorder Recording of all parameters in individual intervals

Individual screens can be defined

Zoom in and out

Storing fast (full sampling rate) or reduced (e.g. 600 sec.)

Detailed zoom-in to pulse width!

Power Measurement


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X/Y Recorder Orbitals can be generated online

P over Q as example for this function

FFT - Harmonics Analysis U, I, P and Q

Individual setup of the number of harmonics including DC-component (Example: 20 kHz sampling rate = 200 harmonics @ 50 Hz)

Interharmonics, groups or single values

According to IEC 61000-4-7

Calculation corrected to the actual real frequency

THD, THD even, THD odd

Trigger on each parameter

Background harmonics substractable

Optionally definable group-mode for harmonics and interharmonics. Selectable number of pins and frequency groups - “200 Hz“ according to IEC 61000-4-7 (OPT-DB required)

Full FFT - Frequency Analysis In addition to the harmonics FFT a full frequency based FFT is available.

All frequencies can be analyzed with this function

Trigger on FFT patterns

Definable filters (hanning, haming, flat top, rectangle, …)

Flicker According to IEC 61000-4-15

PST and PLT with flexible intervals

Individual recalculation intervals

PF5, du, dumax

Flicker emission (current flicker)

Fault Recorder Setting a trigger on all parameters of the power module!

U, I, P, Q, S, D, cos Phi, power factor, ...

Each harmonic!

Pos-, neg-, zero-sequence systems

Very fast glitch detection (up to MS/s)

Math. channels (rpm, torque, efficiency,…)

Edge-, filtered edge- and window-trigger

Setting the trigger on rising edge when the threshold has been crossed

Setting the trigger on falling edge when the threshold has been crossed

Setting the trigger when signal enters the range between two definable threshold levels

Setting the trigger when signal leaves the range between two definable threshold levels

Further trigger functions: pulse width, window and pulse width, slope, FFT and time



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Additional Features

Video

The parallel usage of the synchronic DEWESoft VIDEO function allows the user to store videos in parallel with the data recording and opens a wide range of applications – whenever optical information is needed!

Other Additional Input Channels

Other DEWETRON DAQP modules are available with which – depending on the kind of sensor - other parameters such as temperature, sound and vibration can be measured in parallel ways. More detailed information can be found in the DEWE-DAQ manual or be obtained from your DEWETRON dealer.

Math Functions

With the additional MATH Function of DEWESoft calculations of for exam-ple efficiency, difference of input, output and phase angle differences can be implemented easily. Use all POWER parameters as input value!

Arithmetic functions

Trigonometric functions

Logic functions

Signal generator

Event functions

d/dt, integration

Highpass-, lowpass- and bandpass-filters

Transfer curve functions

GPS and NET

With the use of the GPS function a comparison of different units on different locations is possible. Phasor measurement and angle comparisons are typical apps for this function.

Rotational and Torsional Vibration Measurement

Torsional vibration is an oscillation of angular motion (twist) which occurs on rotating parts - such as gear trains, crankshafts or clutches. High tor-sional forces and vibrations result in material fatigue, abnormal abrasion etc. and can be destructive in the long run. In many cases, torsional vibra-tion is not noticed until the affected part is damaged. Often only vibration noise is the only indication of torsional vibration.

Remote Control

With the remote control ability the instrument can be configured and the data can be evaluated from your office or wherever you are.

Report Generator and Database Storing (DEWESOFT-OPT-DB)

In several applications, especially when it is necessary to evaluate data over long periods, with different sam-pling rates or in parallel to their acquisition, it might be necessary to use a really strong database tool. Therefore DEWETRON has developed the DATABASE OPTION as an add-on to DEWESoft.

Beside data storing there is also a strong reporting tool available. Diagrams, FFT spectra, Fault reportings and sta-tistic functions are the basic functions and additional reports can be added by using the plug in Technology. Nice visual elements can be used to get a good overview about the full measurement system.

Reports like EN50160 or IEC 61000-2-4 can be easily generated as well as large customized reports on the user‘s needs.

Power Measurement

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DEWE-820-PM-500 DEWE-2600-PM-500 DEWE-5000-PM-500 DEWE-820-PM-1000 DEWE-2600-PM-1000 DEWE-5000-PM-1000

Dynamic analog input channels DEWE-820-PM-500-8: 8DEWE-820-PM-500-16: 16

DEWE-2600-PM-500-8: 8DEWE-2600-PM-500-16: 16

DEWE-5000-PM-500-8: 8DEWE-5000-PM-500-16: 16

DEWE-820-PM-1000-8: 8DEWE-820-PM-1000-16: 16

DEWE-2600-PM-1000-8: 8DEWE-2600-PM-1000-16: 16

DEWE-5000-PM-1000-8: 8DEWE-5000-PM-1000-16: 16

Included DAQP modules at 8 channel units 4x DAQP-HV-S3 and 4x DAQP-LV-B 4x DAQP-HV-S3 and 4x DAQP-LV-BIncluded DAQP modules at 16 channel units 8x DAQP-HV-S3 and 8x DAQP-LV-B 8x DAQP-HV-S3 and 8x DAQP-LV-BExternal quasi-static channel expansion EPAD interface, up to 16 EPAD2 modules = 128 ch EPAD interface, up to 16 EPAD2 modules = 128 chA/D conversionSampling method Simultaneous sampling Simultaneous samplingSampling rate / channel 500 kS/s 1 MS/sResolution 16 bit 16 bitDigital I/O and counters

Digital I/O, TTL level 8 DEWE-820-PM-1000-8: 8DEWE-820-PM-1000-16: 16

DEWE-2600-PM-1000-8: 8DEWE-2600-PM-1000-16: 16

DEWE-5000-PM-1000-8: 8DEWE-5000-PM-1000-16: 16

Counters or digital inputs, TTL level(1 counter equals 4 digital inputs) 2 / 8 DEWE-820-PM-1000-8: 2 / 8

DEWE-820-PM-1000-16: 4 / 16DEWE-2600-PM-1000-8: 2 / 8

DEWE-2600-PM-1000-16: 4 / 16DEWE-5000-PM-1000-8: 2 / 8

DEWE-5000-PM-1000-16: 4 / 16Options

UP-CNT8-TTLadds 8 synchronous counter / encoder or 32 digital inputs, TTL level

via external box ORION-CB-CNT8

UP-CNT8-DIFFadds 8 sync. counter / encoder or 24 digital inputs with programmable threshold levels (0..40 V), input voltage range -35 to 60 V, AC/DC coupling, and 8 sync. digital inputs protected up to 25 VDC, TTL level



CAN bus optionUP-CAN-2optional 2 high-speed CAN bus interfaces Video input optionUP-DEWE-CAM-01adds synchronized video picture acquisition, up to 70 fps at 640 x 480 pixel

Optional sensorsCurrent / Shunt 5 A / 0.1 Ohm Shunt 5 A / 0.1 Ohm ShuntCurrent / Transducers 60, 200, 400, 700, 1000, 2000, 5000 A 60, 200, 400, 700, 1000, 2000, 5000 ACurrent / Clamps Various models, e.g.: 150 ADC / 1400 AAC Various models, e.g.: 150 ADC / 1400 AAC

EMCESD IEC 61000-4-2 IEC 61000-4-2EMC EN 55011 EN 55011

Power supplySurge IEC 61000-4-5 4 kV IEC 61000-4-5 4 kV Burst IEC 61000-4-4 4 kV; L, N, PE IEC 61000-4-4 4 kV; L, N, PE

Voltage inputsSurge IEC 61000-4-5: 4 kV IEC 61000-4-5: 4 kVBurst IEC 61000-4-4: 4 kV IEC 61000-4-4: 4 kV

Current inputsSurge IEC 61000-4-5: 4 kV IEC 61000-4-5: 4 kVBurst IEC 61000-4-4: 4 kV IEC 61000-4-4: 4 kV

Shock and vibrationShock Desktop or rack mount installation only EN 60068-2-27 MIL-STD 810F 516.5, procedure I Desktop or rack mount installation only EN 60068-2-27 MIL-STD 810F 516.5, procedure IVibration Desktop or rack mount installation only EN 60068-2-6, EN 60721-3-2 class 2M2 MIL-STD 810F 514.5, procedure I Desktop or rack mount installation only EN 60068-2-6, EN 60721-3-2 class 2M2 MIL-STD 810F 514.5, procedure IEnvironmentalOperating temperature 0 to +50 °C 0 to +50 °C (0 to +45 with batteries) 0 to +50 °C 0 to +50 °C 0 to +50 °C (0 to +45 with batteries) 0 to +50 °CStorage temperature -20 to +70 °C -20 to +70 °CHumidity 10 to 80 % non cond., 5 to 95 % rel. humidity 10 to 80 % non cond., 5 to 95 % rel. humidityData storage 1)

Technology Hard disk Hard diskCapacity 1000 GB 600 GB 1000 GB 1000 GB 600 GB 1000 GBMax. gap free storing to disk Typ. 70 MB/s Typ. 80 MB/s Typ. 70 MB/s Typ. 70 MB/s Typ. 80 MB/s Typ. 70 MB/sTyp. duration of recording (16 ch. / 10 kS/s/ch. / 16 bit) 35 days 20 days 35 days 35 days 20 days 35 daysMain system 1)

Display - 15” TFT (1024 x 768) 17” TFT (1280 x 1024) - 15” TFT (1024 x 768) 17” TFT (1280 x 1024)Processor Intel® Core™2 Duo 2 GHz Intel® Core™2 Duo 2 GHzCurrent transducer power supply 9V 4x Binder 712 socket 4x Binder 712 socketInterfaces 4x USB, 2x Ethernet, 1x RS-232 4x USB, 2x Ethernet, 1x RS-232Power supply

Standard 95 to 260 VAC 50 / 60Hz110 / 220 VDC

Battery powered, 3 battery slots 2), 3 batt. for ~2 hrs. operation incl.,incl. external AC power supply

95 to 260 VAC 50 / 60Hz110 / 220 VDC

95 to 260 VAC 50 / 60Hz110 / 220 VDC


95 to 260 VAC 50 / 60Hz110 / 220 VDC

Optional - 95 to 260 VAC 50 / 60Hz or 110 / 220 VDC - - 95 to 260 VAC 50 / 60Hz or 110 / 220 VDC -

DimensionsHousing 19” rack-mount, 4U Portable instrument Portable instrument 19” rack-mount, 4U Portable instrument Portable instrument

Dimensions (W x D x H) 437 x 443 x 181 mm(17.2 x 17.4 x 7.1 in.)

417 x 246 x 303 mm(16.4 x 9.6 x 11.9 in.)

460 x 351 x 192 mm(18.1 x 13.8 x 7.7 in.)

437 x 443 x 181 mm(17.2 x 17.4 x 7.1 in.)

417 x 246 x 303 mm(16.4 x 9.6 x 11.9 in.)

460 x 351 x 192 mm(18.1 x 13.8 x 7.7 in.)

Weight without batteries Typ. 12 kg (26.4 lb.) Typ. 14 kg (31 lb.) Typ. 17 kg (37.4 lb.) Typ. 12 kg (26.4 lb.) Typ. 14 kg (31 lb.) Typ. 17 kg (37.4 lb.)1) Please find current specifications in the latest price list 2) Weight of one battery: 660 g (1.45 lb.)

PM Instruments Nothing is required to complete these instruments.


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Power Measurement

DEWE-820-PM-500 DEWE-2600-PM-500 DEWE-5000-PM-500 DEWE-820-PM-1000 DEWE-2600-PM-1000 DEWE-5000-PM-1000

Dynamic analog input channels DEWE-820-PM-500-8: 8DEWE-820-PM-500-16: 16

DEWE-2600-PM-500-8: 8DEWE-2600-PM-500-16: 16

DEWE-5000-PM-500-8: 8DEWE-5000-PM-500-16: 16

DEWE-820-PM-1000-8: 8DEWE-820-PM-1000-16: 16

DEWE-2600-PM-1000-8: 8DEWE-2600-PM-1000-16: 16

DEWE-5000-PM-1000-8: 8DEWE-5000-PM-1000-16: 16

Included DAQP modules at 8 channel units 4x DAQP-HV-S3 and 4x DAQP-LV-B 4x DAQP-HV-S3 and 4x DAQP-LV-BIncluded DAQP modules at 16 channel units 8x DAQP-HV-S3 and 8x DAQP-LV-B 8x DAQP-HV-S3 and 8x DAQP-LV-BExternal quasi-static channel expansion EPAD interface, up to 16 EPAD2 modules = 128 ch EPAD interface, up to 16 EPAD2 modules = 128 chA/D conversionSampling method Simultaneous sampling Simultaneous samplingSampling rate / channel 500 kS/s 1 MS/sResolution 16 bit 16 bitDigital I/O and counters

Digital I/O, TTL level 8 DEWE-820-PM-1000-8: 8DEWE-820-PM-1000-16: 16

DEWE-2600-PM-1000-8: 8DEWE-2600-PM-1000-16: 16

DEWE-5000-PM-1000-8: 8DEWE-5000-PM-1000-16: 16

Counters or digital inputs, TTL level(1 counter equals 4 digital inputs) 2 / 8 DEWE-820-PM-1000-8: 2 / 8

DEWE-820-PM-1000-16: 4 / 16DEWE-2600-PM-1000-8: 2 / 8

DEWE-2600-PM-1000-16: 4 / 16DEWE-5000-PM-1000-8: 2 / 8

DEWE-5000-PM-1000-16: 4 / 16Options

UP-CNT8-TTLadds 8 synchronous counter / encoder or 32 digital inputs, TTL level


UP-CNT8-DIFFadds 8 sync. counter / encoder or 24 digital inputs with programmable threshold levels (0..40 V), input voltage range -35 to 60 V, AC/DC coupling, and 8 sync. digital inputs protected up to 25 VDC, TTL level



CAN bus optionUP-CAN-2optional 2 high-speed CAN bus interfaces Video input optionUP-DEWE-CAM-01adds synchronized video picture acquisition, up to 70 fps at 640 x 480 pixel

Optional sensorsCurrent / Shunt 5 A / 0.1 Ohm Shunt 5 A / 0.1 Ohm ShuntCurrent / Transducers 60, 200, 400, 700, 1000, 2000, 5000 A 60, 200, 400, 700, 1000, 2000, 5000 ACurrent / Clamps Various models, e.g.: 150 ADC / 1400 AAC Various models, e.g.: 150 ADC / 1400 AAC

EMCESD IEC 61000-4-2 IEC 61000-4-2EMC EN 55011 EN 55011

Power supplySurge IEC 61000-4-5 4 kV IEC 61000-4-5 4 kV Burst IEC 61000-4-4 4 kV; L, N, PE IEC 61000-4-4 4 kV; L, N, PE

Voltage inputsSurge IEC 61000-4-5: 4 kV IEC 61000-4-5: 4 kVBurst IEC 61000-4-4: 4 kV IEC 61000-4-4: 4 kV

Current inputsSurge IEC 61000-4-5: 4 kV IEC 61000-4-5: 4 kVBurst IEC 61000-4-4: 4 kV IEC 61000-4-4: 4 kV

Shock and vibrationShock Desktop or rack mount installation only EN 60068-2-27 MIL-STD 810F 516.5, procedure I Desktop or rack mount installation only EN 60068-2-27 MIL-STD 810F 516.5, procedure IVibration Desktop or rack mount installation only EN 60068-2-6, EN 60721-3-2 class 2M2 MIL-STD 810F 514.5, procedure I Desktop or rack mount installation only EN 60068-2-6, EN 60721-3-2 class 2M2 MIL-STD 810F 514.5, procedure IEnvironmentalOperating temperature 0 to +50 °C 0 to +50 °C (0 to +45 with batteries) 0 to +50 °C 0 to +50 °C 0 to +50 °C (0 to +45 with batteries) 0 to +50 °CStorage temperature -20 to +70 °C -20 to +70 °CHumidity 10 to 80 % non cond., 5 to 95 % rel. humidity 10 to 80 % non cond., 5 to 95 % rel. humidityData storage 1)

Technology Hard disk Hard diskCapacity 1000 GB 600 GB 1000 GB 1000 GB 600 GB 1000 GBMax. gap free storing to disk Typ. 70 MB/s Typ. 80 MB/s Typ. 70 MB/s Typ. 70 MB/s Typ. 80 MB/s Typ. 70 MB/sTyp. duration of recording (16 ch. / 10 kS/s/ch. / 16 bit) 35 days 20 days 35 days 35 days 20 days 35 daysMain system 1)

Display - 15” TFT (1024 x 768) 17” TFT (1280 x 1024) - 15” TFT (1024 x 768) 17” TFT (1280 x 1024)Processor Intel® Core™2 Duo 2 GHz Intel® Core™2 Duo 2 GHzCurrent transducer power supply 9V 4x Binder 712 socket 4x Binder 712 socketInterfaces 4x USB, 2x Ethernet, 1x RS-232 4x USB, 2x Ethernet, 1x RS-232Power supply

Standard 95 to 260 VAC 50 / 60Hz110 / 220 VDC


95 to 260 VAC 50 / 60Hz110 / 220 VDC

95 to 260 VAC 50 / 60Hz110 / 220 VDC


95 to 260 VAC 50 / 60Hz110 / 220 VDC

Optional - 95 to 260 VAC 50 / 60Hz or 110 / 220 VDC - - 95 to 260 VAC 50 / 60Hz or 110 / 220 VDC -

DimensionsHousing 19” rack-mount, 4U Portable instrument Portable instrument 19” rack-mount, 4U Portable instrument Portable instrument

Dimensions (W x D x H) 437 x 443 x 181 mm(17.2 x 17.4 x 7.1 in.)

417 x 246 x 303 mm(16.4 x 9.6 x 11.9 in.)

460 x 351 x 192 mm(18.1 x 13.8 x 7.7 in.)

437 x 443 x 181 mm(17.2 x 17.4 x 7.1 in.)

417 x 246 x 303 mm(16.4 x 9.6 x 11.9 in.)

460 x 351 x 192 mm(18.1 x 13.8 x 7.7 in.)

Weight without batteries Typ. 12 kg (26.4 lb.) Typ. 14 kg (31 lb.) Typ. 17 kg (37.4 lb.) Typ. 12 kg (26.4 lb.) Typ. 14 kg (31 lb.) Typ. 17 kg (37.4 lb.)1) Please find current specifications in the latest price list 2) Weight of one battery: 660 g (1.45 lb.)

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DAQP-HV-S3 HSI-HV

Input ranges unipolar and bipolar 20 V, 50 V, 100 V, 200 V, 400 V, 800 V, 1400 V 20 V1), 50 V1), 100 V, 200 V, 400 V, 800 V, 1400 VDC accuracy 20 V and 50 V 100 V to 1400 V

±0.05 % of reading ±40 mV

±0.05 % of reading ±0.05 % of rangeFilter (lowpass) Filter characteristics AC accuracy

10, 30, 100, 300, 1k, 3k, 10k, 30k, 100k, 700 kHz(1)

Bessel or Butterworth 40 dB/decade Frequency additional AC error f/f0 % of reading <0.1 0 0.1 0.01 0.2 0.14 0.3 0.72 0.5 4.2 0.75 20 1 40

100, 300, 1k, 3k, 10k, 30k, 100k, 300k, 1M, 2 MHz(1)


Frequency accuracyAngle errors

±1 mHz Frequency Error f/f0 ° <0.1 0.001 0.1 0.25 0.2 0.75 0.3 0.8 0.5 1 0.75 1 1 1


Gain linearity 0.03 % of full scale 0.05 % of full scaleGain drift range Typical 20 ppm/°K (max. 50 ppm/°K)Offset drift 20 V to 100 V 200 V to 1400 V

Typical 0.5 mV/°K max. 4 mV/°K Typical 5 ppm/°K max. 20 ppm of Range/°K

Long term stability 100 ppm/sqrt (1000 hrs)Input resistance 10 MOhm3 dB Bandwidth (DAQP-HV) 700 kHz(2) 2 MHzFilter selection Push button or softwareFilter (lowpass) 10, 30, 100, 300, 1k, 3k, 10k, 30k, 100k, 300 kHz(3,4), 700 kHz(5) 100, 300, 1k, 3k, 10k, 30k, 100k, 300 kHz, 1 MHz, 2 MHz2)

Filter type Bessel or Butterworth 40 dB/decadeTypical SFDR and SNR 50 V 200 V 1400 V

300 kHz 100 kHz 10 kHz SFDR SNR SFDR SNR SFDR SNR 98 76 101 81 dB 108 90 dB 98 84 101 89 dB 108 91 dB 98 86 102 91 dB 107 92 dB

1 MHz 100 kHz 10 kHz SFDR SNR SFDR SNR SFDR SNR 98 76 101 81 dB 108 90 dB 98 84 101 89 dB 108 91 dB 98 86 102 91 dB 107 92 dB

Typical CMRR >80 dB @ 50 Hz 70 dB @ 400 Hz 60 dB @ 1 kHz

48 dB @ 10 kHzIsolation voltage Line to Ground 1.4 kVrms

Line to Line 1.8 kVrmsProtection Surge (1.2/50) Burst (5 kHz)

CAT III 600 CAT IV 300

±4000 V ±4000 V

Output voltage ±5 VOutput resistance <10 OhmOutput current 5 mAOutput protection Short to ground for 10 sec.Power supply ±9 VDC ± 1%Power consumption 0.7 W 1 WPower On default settings Software programableConnector -B -SCRS-485 interface Yes1) 20 V and 50 V bandwidth limited to 1 MHz2) 1 MHz exclusively for Bessel filter characteristic3) 300 kHz exclusively for Bessel filter characteristic 4) 180 kHz exclusively for DAQP-HV Revision 1.00 5) 700 kHz exclusively for Bessel filter characteristic

HV Modules



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DAQP-LV HSI-LV

Input ranges unipolar and bipolar 10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2.5 V, 5 V, 10 V, 25 V, 50 VPush button selectable ranges 10 mV, 50 mV, 200 mV, 1 V, 5 V, 10 V, 50 V

DC accuracy Bipolar Unipolar

Range Accuracy 10 mV to 50 mV ±0.02 % of reading ±40 µV 100 mV to 50 V ±0.02 % of reading ±0.05 % of range 10 mV to 50 mV ±0.04 % of reading ±40 µV 100 mV to 50 V ±0.04 % of reading ±0.05 % of range

Range Accuracy 10 mV to 50 mV ±0.05 % of reading ±40 µV 100 mV to 50 V ±0.05 % of reading ±0.05 % of range 10 mV to 50 mV ±0.08 % of reading ±40 µV 100 mV to 50 V ±0.08 % of reading ±0.05 % of range

Filter (lowpass) Filter characteristics AC accuracy

10, 30, 100, 300, 1k, 3k, 10k, 30k, 100k, 300 kHz(1)


100, 300, 1k, 3k, 10k, 30k, 100k, 300k, 1M, 2 MHz(1)


Frequency accuracyAngle errors



Input coupling DC or AC software selectable (1.5 Hz standard, custom on request down to 0.01 Hz)Gain linearity 0.01 % of full scale 0.03 % of full scaleGain drift range Typically 10 ppm/°K (max. 20 ppm/°K)Offset drift 10 mV to 200 mV 500 mV to 50 V

Uni- and bipolar 3 µV/°K

10 ppm of Range/°KLong term stability 100 ppm/sqrt (1000 hrs)Input resistance 1 MOhmBandwidth (-3 dB) 300 kHz 2 MHzFilter selection Push button or software

Filters (low pass) 10 Hz, 30 Hz, 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz, 300 kHz

100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz, 300 kHz, 1 MHz

Filter characteristics

10 Hz to 100 kHz: Butterworth or Bessel 40 dB/dec (2nd order; ±1.5 dB @ f0) 300 kHz: Bessel 60 dB/dec (3rd order; 0 to -3 dB @ 300kHz)

Typical SFDR and SNR: 20 mV 1 V 50 V

300 kHz 100 kHz 10 kHz SFDR SNR SFDR SNR SFDR SNR 100 dB 72 dB 98 dB 76 dB 97 dB 84 dB 102 dB 82 dB 99 dB 93 dB 97 dB 96 dB 102 dB 82 dB 99 dB 93 dB 97 dB 96 dB

1 MHz 100 kHz 10 kHz SFDR SNR SFDR SNR SFDR SNR 100 dB 72 dB 98 dB 76 dB 97 dB 84 dB 102 dB 82 dB 99 dB 93 dB 97 dB 96 dB 102 dB 82 dB 99 dB 93 dB 97 dB 96 dB

Typical CMRR 10 mV to 1 V range: 2.5 V to 50 V range: >100 dB @ 50 Hz 90 dB @ 50 Hz >100 dB @ 1 kHz 65 dB @ 1 kHz 83 dB @ 10 kHz 55 dB @ 10 kHz

Input overvoltage protection 350 VDC

Isolation voltage 350 VDC (1 kVRMS with banana connector)Sensor supply ±9 V (±1 %), 12 V (±5 %), 200 mA resettable fuse protected(2)

Output voltage ±5 VOutput resistance <10 OhmMaximum output current 5 mAOutput protection Short to ground for 10 sec.Power On default settings Software programablePower supply ±9 VDC ±1 %Power consumption 0.8 W without sensor supplyConnector -B -SC -SUBD -LEMO -BNCRS-485 interface YesTEDS Hardware support for TEDS (Transducer Electronic Data Sheet) (SUBD Type only)Supported TEDS chips DS2406, DS2430A, DS2432, DS2433, DS2431Supported MSI MSI-V-ACC; MSI-V-RTD MSI-V-ACC; MSI-V-RTD, MSI-V-CH-501) 300 kHz exclusively for Bessel filter characteristic2) Overall current should not exceed DEWE-30-xx maximum power

LV Modules

Power Measurement


www.dewetron.com12

High Precision Current Transducers

Three to six channels

Models from 200 Apk to 1000 Apk

High linearity Low offset

High bandwidth Low phase error

SpecificationsModel PM-MCTC 60 PM-MCTS 200 PM-MCTS 400 PM-MCTS 700 PM-MCTS 1000Transducer PM-867-60I PM-867-200I PM-867-400I PM-867-700I PM-867-1000IHF

DC, Peak 60 A 200 A 400 A 700 A 1000 ARMS Sinus 40 A 140 A 280 A 500 A 700 AOverload AbilityNormal Operation 110 % (220 Apk) 110 % (220 Apk) 110 % (440 Apk) 110 % (770 Apk) 110 % (1100 Apk)Short Time (100 mS) 500 % (1000 Apk) 500 % (1000 Apk) 500 % (2000 Apk) 500 % (3500 Apk) 500 % (5000 Apk)Bandwidth DC … 1 MHz DC … 1 MHz DC … 500 kHz DC … 250 kHz DC … 1 MHzTemperature Influence 1 ppm/K 1 ppm/K 1 ppm/K 1 ppm/K 1 ppm/KOutput Ratio 200 mApk

bei 60 Apk

200 mApk

bei 200 Apk

200m Apk

bei 400 Apk

400 mApk

bei 700 Apk

1 Apk

bei 1000 Apk

Linearity 0.001 % 0.001 % 0.001 % 0.001 % 0.001 %Offset 0.004 % 0.004 % 0.004 % 0.004 % 0.004 %Frequency Influence 0.03 %/kHz 0.03 %/kHz 0.06 %/kHz 0.12 %/kHz 0.03 %/kHzAngular Influence 0.01° + 0.045°/kHz 0.01° + 0.045°/kHz 0.01° + 0.06°/kHz 0.01° + 0.12°/kHz 0.01° + 0.045°/kHzShunt PM-MCTS-BR5 PM-MCTS-BR5 PM-MCTS-BR5 PM-MCTS-BR5 PM-MCTS-BR1

Primary Current Range

Model overview 60 A - 1000 A

Optional Shunts PM-MCTS-BR1 PM-MCTS-BR2.5 PM-MCTS-BR5

1 A / 1 Ω / 1 W Shunt 800 mA / 2,5 Ω / 1 W 400 mA / 5 Ω / 1 Wfor MCTS 1000 Shunt for MCTS 700 Shunt for MCTS 200/400

Amplitude Accuracy 0.1 % 0.05 % 0.05 %Angular Accuracy 1° at 100 kHz 1° at 100 kHz 1° at 100 kHzFrequency Range 300 kHz / 0.5 dB 300 kHz / 0.5 dB 300 kHz / 0.5 dB

Power supply PM-MCTS

Nominal Current Range Basic Three Channel System

Additional Current Channel

Optional Shunt

60 A (Transducer PM-867-60I) PM-MCTS-60 PM-CM-60 PM-MCTS-BR5200 A (Transducer PM-867-200I) PM-MCTS-200 PM-CM-200 PM-MCTS-BR5400 A (Transducer PM-867-400I) PM-MCTS-400 PM-CM-400 PM-MCTS-BR5700 A (Transducer PM-867-700I) PM-MCTS-700 PM-CM-700 PM-MCTS-BR51000 A (Transducer PM-867-1000IHF) PM-MCTS-1000 PM-CM-1000 PM-MCTS-BR1

- MCTS Rack - 1 internal Power Supply - 1 Plug-On Shunt- 3 internal Power Supplies - 1 Transducer Head- 3 Transducer Heads - 1 Connection Cable- 3 Connection Cables 10 m- Power Cord

100.000

10.000

1.000

0.100

0.010

0.0015000005000050005005050

Amplitude-/ phase-error depending on frequency

Frequency (Hz)

Amplitude-error

Phase-error

10.000

1.000

0.100

0.010

0.001100806040200

Amplitude-error depending on range (DC)

Range (%)

Amplitude-error (%)


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2000 A - 5000 A

Power Measurement

ULTRASTAB SATURN Current Output Voltage Output PM-SATURN-2000IHF PM-SATURN-5000I-140 PM-SATURN-2000U PM-SATURN-5000U-140

Primary Nominal current (Ipn) Programmable in steps of

2000 A 125 A

5000 A 250 A

2000 A 125 A

5000 A 250 A

Polarity Bipolar Bipolar Nom. output range ± 1.0 A ± 2.0 A ±10 V Max. output load 1.5 Ω 0.75 Ω 5 mA Overload capacity (normal operation) 15 % 15 % 15 % 15 %Overload capacity (fault) 500 % (0.1 s) 1000 % (0.1 s) 500 % (0.1 s) 1000 % (0.1 s) Absolute calibration (23 ºC amb.) - - < 50 ppm < 50 ppm Linearity error < 2 ppm < 3 ppm < 4 ppm < 5 ppm Gain accuracy < 4 ppm < 6 ppm - -

Measuring/ratio stability Vs. temp. Vs. time

< 1 ppm/ºC

< 1 ppm/month

< 1 ppm/ºC

< 1 ppm/month

≤ 2 ppm/ºC

< 2 ppm/month

≤ 2 ppm/ºC

< 2 ppm/month

Offset Initial Drift vs. temperature Drift vs. time

< 2 ppm (adj.) < 0.5 ppm/ºC

< 1 ppm/month


< 1 ppm/month


< 1 ppm/month


< 1 ppm/month

Output noise (RMS) DC - 10 Hz DC - 10 kHz DC - 50 kHz

< 0.1 ppm < 2 ppm < 4 ppm

< 0.1 ppm < 2 ppm < 4 ppm

< 0.1 ppm < 2 ppm < 4 ppm

< 0.1 ppm < 2 ppm < 4 ppm

Noise feedback to main conductor DC – 100 kHz (RMS)

< 10 µV

< 10 µV

< 10 µV

< 10 µV

Dynamic response correctly followed to 0.1%

> 20 A / µS

> 20 A / µS

> 20 A / µS

> 20 A / µS

Delay time < 1 uS < 1 uS < 1 uS < 1 uS

Bandwidth (3 dB, small signal 0.5%)

0 – 300 kHz (<5 % of Ip)

0 – 50 kHz (<5 % of Ip)

0 – 300 kHz (<5 % of Ip)

0 – 50 kHz (<5 % of Ip)

Test voltages 5 KV ACRMS 5 KV ACRMS

Operating temperature Electronics Measuring heads

10 - 40 ºC 0 - 55 ºC

10 - 40 ºC 0 - 55 ºC

Supply voltages 100 / 115 / 230 VAC, +/-10 % -50/60 Hz 100 / 115 / 230 VAC, +/-10 % - 50/60 Hz Supply current/power 50 VA 100 VA 50 VA 100 VA Busbar free zone to be within linearity spec. Cylinder shape (diameter x length)

ø 220 x 220 mm

(8.6 x 8.6 in.)

T.B.D

ø 220 x 220 mm

(8.6 x 8.6 in.)

T.B.D

Cable length Standard Optional

2.5 m 30 m

2.5 m 30 m

2.5 m 30 m

2.5 m 30 m

Electronics Dimension Weight

Rack mount 483 x 89 x 371 mm (19 x 3.5 x 14.6 in.)

5 kg (11.1 lb.)

Rack mount 483 x 89 x 371 mm (19 x 3.5 x 14.6 in.)

5 kg (11.1 lb.)

Transducer heads Dimension Weight

With ø50 hole 165 x 200 x 50 mm (6.5 x 7.9 x 2 in.) 3.5 kg (7.72 lb.)

With ø150 hole 350 x 350 x 92 mm

(13.8 x 13.8 x 3.6 in.) 17 kg (30.86 lb.)

With ø50 hole 165 x 200 x 50 mm (6.5 x 7.9 x 2 in.) 3.5 kg (7.72 lb.)

With ø150 hole 350 x 350 x 92 mm

(13.8 x 13.8 x 3.6 in.) 17 kg (30.86 lb.)

2000 A 5000 A

2 models of current transducer systems


www.dewetron.com14

Shunts & Current Clamps

Shunts DAQ-SHUNT-3 DAQ-SHUNT-4 DAQ-SHUNT-5Application Power grid analysis Power grid analysis Power grid analysis

Type of current AC + DC AC + DC AC + DCImpedance 0.1 Ohm 0.1 Ohm 0.1 OhmAccuracy 0.1 % 0.1 % 0.1 %

Temperature drift <±10ppm/K (20 °C to 60 °C) <±10ppm/K (20 °C to 60 °C) <±10ppm/K (20 °C to 60 °C)

Connectors

Input: 2 m cable with banana plugs

Output: 30 cm cable with banana plugs

Input: built-in banana jacksOutput: 30 cm cable with

banana plugs

Input: built-in banana jacksOutput: built-in banana jacks

PNA-CLAMP-150-DCCurrent range 300 ADC or ACpeak Power supply

OPTION for * DEWE-2600/2602: * For others:

±15 V ±10 %, external

0.5U-CLAMP-DC-POWER-4/-8CLAMP-DC-POWER-4/-8

Cont. current measurement 150 ADC or ACRMS

Overload capability 500 ADC (for 1 min)

Output sensitivity 20 mV/A (w.r.t. 0 V) Connector SUB D(TED); (SUBD modules required for TEDS support)Supply (LEMO; incl. jaws

status); Adapter SUB D-banana included

Accuracy (+ 25 °C) ±1 % of reading ±2 mA

Resolution ±1 mA

Frequency Range DC to 100 kHz (-1 dB) Max. conductor size 32 mm diameterJaw status 0 V (Lo) / +15 V (Hi) Relative zero correction Auto zero at switch on

Flexible current loop with selectable range (PNA-A100-300-45)Application Power grid analysis, AC applications

AC input range 0.5 to 300 Aselectable

0.5 to 3000 AOutput 10 mV/A 1 mV/A

% accuracy 5 to 300 A <= 1 % 5 to 300 A <= 1 %Phase shift (45 to 65 Hz) 0.5 to 300 A <= 0.7° 0.5 to 300 A <= 0.7°

Temperature drift <±50 ppm/K (-10 °C to 55 °C)

PNA-CLAMP-1000-DCAC input range 0.2 to 100 A selectable 0.5 to 1000 ADC input range 0.4 to 150 A selectable 0.5 to 1400 AOutput 10 mV/A 1 mV/A% accuracy 0.5 to 20 A ≤ 1 % +50 mV 0.5 to 100 A 1.5 % +1 mV

20 to 100 A 1.5 % 100 to 800 A 2.5 %100 to 150 ADC 2.5 % 800 to 1000 A 4 %

1000 to 1400 A 4 %Bandwidth DC to 10 kHz at -3 dBPhase shift 10 to 20 A < 3° 10 to 200 A < 2°

20 to 100 A < 2° 20 to 1000 A < 1.5° Working temperature -10° to +55°C Temperature drift ≤ 0.3 % of output signal per 10K Connector type Safty banana sockets (4 mm)Fits to following systems All system with DAQ series amplifiers

PNA-FLEX-MINI-300-70 (PNA-A100-300-80)AC input range 0.5 to 300 A

selectable0.5 to 3000 A

Output 10 mV/A 1 mV/A% accuracy 0.5 to 5 A not specified 0.5 to 5 A not specified

5 to 300 A ≤ 1 % 5 to 3000 A ≤ 1 %Bandwidth 10 Hz ... 20 kHzPhase shift 0.5 to 5 A ≤ 0.7° 0.5 to 5 A ≤ 0.7°

5 to 300 A ≤ 0.7° 5 to 3000 A ≤ 0.7°Working temperature -10° to +55°C (maximum temperature for sensor is 90°C)Temperature drift ≤ 0.5 % of output signal per 10K Connector type C16-1, 6+PE Length of coil 69 cmFits to following systems DEWE-5xx-PNA

DEWE-5xx-PNA-1MS



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Power Measurement

Voltage Error EV [%]

Current Error EC [%]

Phase Error EPhi [°]

Cos Error EcosPhi [%]

Sin Error EsinPhi [%]

Power ES [%]

Active Power EP [%]

Reactive Power EQ [%]

Power Errors

Example:

U=100 V; voltage range=200 V; no voltage transducer (VT)

I=10 A; current range=40 A; current transducer=PM-MCTS-200; shunt=PM-BR5

F=50 Hz, filter=300000 kHz

Phi=30°

Voltage Error EV [%]

Current Error EC [%]

Phase Error EPhi [°]

Cos Error EcosPhi [%]

Sin Error EsinPhi [%]

Power ES [%]

Active Power EP [%]

Reactive Power EQ [%]

4010

20010

0,15 %

0,15 %

0,15 %

ftp://ftp.dewetron.com/public/power/dewe power accuracy.xls


www.dewetron.com16

Accuracy Example MCTS 200

Maximum P-error and Q, S as function of Phi

Maximum P-error as function of current for different cosPhi

Maximum P-error as function of frequency with cariable current/max current (fmax = 50 000 Hz)

Current module: DAQP-LV

Range: 1 V

Filter: 300 kHz

Shunt: PM-BR5

Current Transducer: PM-MCTS-200

Voltage module: DAQP-HV-S3

Range: 200 V

Filter: 700 kHz

Voltage [V]: 100

Current [A]: 140 A

Frequency [Hz]: 50

Phi [°] : 30



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Maximum P-error and Q, S as function of Phi

Maximum P-error as function of current for different cosPhi

Maximum P-error as function of frequency with cariable current/max current (fmax = 50 000 Hz)

Accuracy Example DAQP-LAVoltage [V]: 100

Current [A]: 5 A

Frequency [Hz]: 50

Phi [°] : 30

Current module: DAQP-LA

Range: 10 A

Filter: 300 kHz

Voltage module: DAQP-HV-S3

Range: 200 V

Filter: 700 kHz


www.dewetron.com18

Measuring on Electrical MachinesApplication Example for Power Measurement

Introduction Hardly a motion that is not carried out by an electrical drive, hardly no drive motor with any kind of electrical machine, hardly an electric motor that is not operated by a frequency converter. Efficient technologies are required, best efficiency factors are demanded and highly accurate measurements are there-

fore necessary. Such drives cause an increased adoption of power electronics and all implications connected with that such as circuit feedback, broadband frequency spectra of current and voltage, pulse-frequency modulated signals and fast slew rates of the volt-age impulses.

Task Modern frequency converters use various algorithms in order to simulate voltage and currents. They all have in common that electric switches (IGBTs) are used that have steep rising edges (3 kV/µs) and high pulse frequencies (up to 40 kHz).

Broadband measurements with high dynamics for voltage and currents are, in this case, necessary to fulfill the fol-lowing tasks:

Exact identification of active power

Identification of reactive power, also in case of high phase angles

Identification of power loss

Efficiency factor (also mechanical parameters)

Especially for the identification of efficiency factors several power measurements are required at the same time: 3~ grid, 3~ motor, 1~ intermediate circuit, rotation speed and torsional moment are not uncommon. Measuring these parameters synchronously and accurately is the big challenge.

SolutionDEWETRON‘s solutions for this application are DEWE-PM instruments with the DEWE-ORION cards 1616-500 or 0816-1000 and DAQP-HV-S3 modules for measuring voltage and DAQP-LV modules for measuring current.

Motor

Operatingpoint

Mom

ent M

Speed frequency n

Engine



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Beside the standard functions of power measurement instruments, several additional measurements are required to be able to carry out a complete analysis of the motors:

± 1400 Vpeak

4 kV electric strength

2 MHz bandwidth

1 MS/s sampling rate

Typical accuracy of < 0,05 %

Individual number of channels

Several power modules in one instrument

Every power module can have its individual frequency (software PLL)

DC, 16,7 Hz, 50 Hz, 60 Hz, 400 Hz, 800 Hz, variable frequencies

Synchronous analysis of harmonics and frequency

Mathematical library (e.g. calculation of various efficiency factors)

Video recording in parallel

System perturbation for frequency converters according to EN61000-3-2

Power curve and characteristic curve of revolutions per minute (rpm) and torsional moment

Electrical characteristics such as harmonics, fundamental power, reactive power, switching operation, run-up

DC-measurements in the frequency converter

Analysis as regards grid, motor, intermediate circuit and – mechanically – the drive shaft (Welle)

Voltages up to 1000 VRMS directly measurable (DAQP-HV module)

Analyses of run-up with data storage and processing

Mechanical parameters such as rotation speed and vibration of the motor and the shaft respectively

Acoustic emission (sound power level, frequency spectrum)

Hardware Only one DEWETRON measurement instrument is needed to carry out all these measurements. Based on the new DEWE-PM-series it is quite easy to define the appropriate hardware solution for you. With up to 16 input channels several power modules can be used in order to e.g. synchronously measure parameters regarding grid, motor and intermediate circuit. Additionally, revolutions per minute, torsional moment, temperature and acoustic level measurement can be carried out. The enormous range of DEWETRON modules and sensors makes synchronous measurement and evaluation of param-eters possible. Great importance was attached to the development of these instruments as regards interference resistance. The frequency converter thus benefits from the strong common-mode rejection voltage. Another contri-bution to the interference resistance is the high electric strength.

Software The option power for the DEWESoft is a very high-capacity tool for the calculation of power and other similar param-eters. Due to the calibration in the frequency range a high accuracy of the calculated values is reached. With the help of this unique technology amplitudes and phase can be corrected in the frequency domain. All internal correc-tion curves were incorporated in the software and the sensor data base includes all correction curves for current and voltage converter or whatever sensor is used. Beside the precise calibration the frequency calculation is a central feature of the software. 50 and 60 Hz are a must – for us also DC and variable frequencies are, of course, a must. Due to the high sampling rate (up to 1MS/s) and the modules there is no limitation to the recording of pulse-width modulated signals (up to 700 kHz electrical bandwidth) and the calculation of active, reactive and total power, power factor, etc.

Some Details

Many Power ModulesWith the DEWESoft power module an arbitrary number of power modules can be measured at the same time. Motors e.g. Ugrid/UDC/Umotor

Electrical Machines


www.dewetron.com20

FFT– Harmonics Analysis U, ULine, I, P, cos and Q

Individual setup of number of harmonics including DC (example: sampling rate 20 kHz = max. 200 harmonics @ 50 Hz)

Values adjusted to the actually measured frequency of fundamental oscillation

Frequency analysis up to 500 kHz

Remote Control With the help of the remote control the instruments can be configured from afar – for example while being in the office.

Plug-in OPCThe OPC-plug-in for DEWESoft provides the integration of the measurement instrument in the scada system and thus the implementation of automated test benches. OPC is a standardized protocol for the transmission of data from several measurement instruments (OPC server) to one central computer (OPC client).

Acoustics/Acoustic Level MeasurementAccurate and high-resolution acoustic level measurements according to IEC 60651, 60804, 61672. With its user-friendly interface DEWESoft brings the sophisticated acoustic level measurement/acoustic analysis to the user.

Customers Producers of motors

Producers of frequency converters

Users of drive systems

Plant engineering

Testing institutes

Universities and research centers



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Measuring on TransformersApplication Example for Power Measurement

Introduction The general opinion that low-loss transformers are not a current topic in times of current regulation and thus reasonable energy costs has to be qualified. Low-loss transformers also contrib-ute to the achievement of the Kyoto-objectives as regards the reduction of greenhouse gas emission. The power measurement of transformers, especially the identification of power loss, must be very precise indeed. Precise measurement at a phase angle of 90°, that is mere reactive power, is one of the most important premises.

Task When we talk about transformers we think of the precise identification of losses, short-circuits and idling losses. This means that we need a high accuracy for U, I and P at 50/60 Hz and in small power factors.

Solution

Hardware Based on the new DEWE-PM series it is quite easy to define the adequate hard-ware solution. With up to 16 input channels several power modules can be used in order to e.g. measure 3-phase input and output lines at the same time. With the help of the high number of channels (basic instrument with 16 channels, upgrade rack with another 16 channels) also multi-coil transformers can be identified during one measurement cycle. Additionally, temperature and acoustic/noise level can be measured.

Software/Calibration The option power for DEWESoft is a high-performance tool for the calculation of power and other related parameters. The accuracy of the calculated values is achieved by the calibration in the frequency range and the special calibration of the angle error. Using this unique technology, amplitude and phasing in the frequency range can be corrected. All internal correction curves are considered by this software and the sensor data base includes all corrections for current-, voltage converter or any sensor used. A correction of power measurement is also pos-sible according to IEC 60076-1.

Transformers

www.dewetron.com22

Some Details

Various Power ModulesWith the DEWESoft power module an arbitrary number of power lines can be measured simultaneously. e.g. trans-former: Uprim / Usek / Ueb / U


Individual setup of the number of harmonics including DC (example: sampling rate 20 kHz = max. 200 harmonics @ 50 Hz)

Values adjusted to the actual power frequency

Vector DiagramThe „transparency function“ makes the direct optical comparison of phases possible (e.g. input and output of a transformer). Moreover, the values can be calculated analytically with the help of mathematical functions.

Plugin-OPCWith the OPC-Plugin for DEWESoft the integration in the control technology can be carried out and automated test benches can be put into practice. OPC is a standardized protocol for data transfer from several measurement instru-ments (OPC server) to one central computer (OPC client).

Acoustic/Noise Level Measurement Accurate and high-resolution noise level measurements following IEC 60651, 60804, 61672.

DEWESoft and its user-friendly interface convince and bring the sophisticated noise-/acoustic analysis to the cus-tomer.

Customers All producers of transformers (ranging from power

transformers to distribution transformers)

Companies responsible for maintenance and energy supply companies

Energy supply companies


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Measuring on 400 Hz (800 Hz) MachinesApplication Example for Power Measurement

Introduction Beside the typical grid frequencies of 50 Hz and 60 Hz, 400 Hz and 800 Hz are applied increasingly. The reason for that is the low installation size of generators and motors respectively with the same power. We mainly talk about isolated networks as they are used in on-board power supplies on ships, airplanes or in military applications.

Task Harmonics, voltage fluctuations and transients are a current topic within these fast grids as well as within their slower siblings. However, the difference lies in the necessary bandwidth or sampling rate of the measurement instruments. If you want to analyse 50 harmonics you need a sampling rate of 40 kHz in 400 Hz grids and a sampling rate of even 80 kHz per channel in 800 Hz grids. Transients should even be recorded with 500 kHz or more.

Harmonics measurement

Power measurement

Determination of power factor

Voltage fluctuation

Transients

Efficiency factor

The identification of efficiency factors, especially at low workload and big phase angles, gives information on the overall efficiency. Especially nowadays when energy optimisation is in the focus of interest this is an absolutely important tool.

SolutionDEWETRON‘s solutions for this application are DEWE-PM-instruments with the DEWE-ORION cards 1616-500 or 0816-1000 and DAQP-HV-S3 modules for measuring voltage and DAQP-LV modules for measuring current.

± 1400 Vpeak

4 kV electric strength

2 MHz bandwidth

1 MS/s sampling rate

Typical accuracy of < 0,05 %

Individual number of channels

Several power modules in one instrument

Synchronous analysis of harmonics and frequency

Mathematical library (e.g. calculation of various efficiency factors)

Electromagnetic influences

Power curve and revolutions per minute / torque curve

Electrical characteristics such as harmonics, fundamental power, reactive power, switching operation, run-up

Hardware DEWETRON offers several instruments that are suitable for measurements on 400 Hz (800 Hz) machines. The basis is always a basic instrument with a rack for DAQP module. Special focus was put on the stability and capacity of the instruments inde-pendently from the fact that a 19’’ instrument for a fixed installation or a portable instrument is used.

400 Hz (800 Hz) Machines


www.dewetron.com24

SoftwareThe identification of transients, the calculation of power and the measurement of harmonics are only a few of the numerous functions of the measurement software DEWESoft with its option POWER. Unbalances, flicker, frequency and revolution per minute are some more that are nowadays necessary for the power analysis. Besides, it is very important to reach high sampling rates that can be processed by the software: 500 kHz for the calculation of power are a must-have for controlled drive systems.

Some Details

Many Power ModulesWith the DEWESoft power module an arbitrary number of power modules can be measured at the same time. Motors e.g. Ugrid / UDC / Umotor


Individual setup of number of harmonics including DC (Example: sampling rate 80 kHz = max. 50 harmonics @ 800 Hz)

Values adjusted to the actually measured frequency of fundamental oscillation

Frequency analysis up to 500 kHz

Customers Producers of electrical engines

Producers of frequency converters

Aircraft industry/on-board power supply

Shipbuilding/on-board power supply

Military service/on-board power supply

Test institutes

DEWETRON GmbH • Parkring 4 • A-8074 Graz-Grambach • Tel (0043) 316 3070 0 • Fax (0043) 316 3070 90 • [email protected]


Documents

Power Fault Recording Power Network Analysis E-Mobility