# Power Measurement

Power Measurement
DEWE-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, symmetries, 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
www.dewetron.com/power-measurement
Power Fault Recording
Power Measurement
Power Network Analysis
E-Mobility
Power Measurement
Automotive
Energy & Power Analysis
Aerospace & Defense
Tr a n s p o r t a t i o n
G e n e r a l Te s t & M e a s u r e m e n t
1
Grid
DEWE-xxx-PM
U-module
DAQP-HV
f
3~
A/D
1 Msamples/s
CPU
POWER
module
Math.
functions
I-module
DAQP-LV
M 3~
n, M
DEWESoft
CAN
VIDEO
P, Q, S, ...
FFT
Symmetrical components
n, M, ω, η
High-speed recording (Streamer)
Long term recording (Logger)
2
www.de we t ron .com
Power Measurement
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 ….
?
??
?
Power Fault Recording
Power Network Analysis
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, symmetrical components and flickers. Long-term recordings as well as quick sampling rates for the examination of e.g.
start-up procedures are possible.
E-Mobility
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)?
Power Measurement
DEWETRON Power Measurement
www.dewetron.com/power-measurement
3
DEWESoft POWER Measurement Software
The option POWER for the DEWESoft (DEWESoft-OPT-POWER) is an absolutely high-performance tool for the calculation 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 reactive 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 additionally offers the possibility to calculate parameters such as torque and angular velocity, or even determine the
efficiencies online.
4
www.de we t ron .com
Power Measurement
Power Calculation
P, Q, S, D
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 Calculation
The 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/Accuracy
The 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 whatever 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.
E-Mobility
P, Q, cosPhi for each harmonic
Power Measurement
CosPhi, power factor
Scope
Power Network Analysis
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
Power Fault Recording
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!
www.dewetron.com/power-measurement
5
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
P ST and P LT with flexible intervals
Individual recalculation intervals
PF5, du, du max
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
6
www.de we t ron .co m
Power Measurement
Video
Power Measurement
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 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 example efficiency, difference of input, output and phase angle differences can
be implemented easily. Use all POWER parameters as input value!
E-Mobility
Arithmetic functions
Trigonometric functions
Logic functions
Signal generator
Event functions
d/dt, integration
Highpass-, lowpass- and bandpass-filters
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 torsional forces and vibrations result in material fatigue, abnormal abrasion
etc. and can be destructive in the long run. In many cases, torsional vibration 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 sampling 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 statistic 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.
Power Fault Recording
Power Network Analysis
Transfer curve functions
Reports like EN50160 or IEC 61000-2-4 can be easily generated as well as large customized reports on the user‘s
needs.
www.dewetron.com/power-measurement
7
PM Instruments
Nothing is required to complete these instruments.
DEWE-820-PM-500
DEWE-2600-PM-500
DEWE-5000-PM-500
DEWE-820-PM-500-8: 8
DEWE-820-PM-500-16: 16
DEWE-2600-PM-500-8: 8
DEWE-2600-PM-500-16: 16
DEWE-5000-PM-500-8: 8
DEWE-5000-PM-500-16: 16
Included DAQP modules at 8 channel units
4x DAQP-HV-S3 and 4x DAQP-LV-B
Included DAQP modules at 16 channel units
8x DAQP-HV-S3 and 8x DAQP-LV-B
External quasi-static channel expansion
A/D conversion
Sampling method
Simultaneous sampling
Sampling rate / channel
500 kS/s
Resolution
16 bit
Digital I/O and counters
Digital I/O, TTL level
8
Counters or digital inputs, TTL level
(1 counter equals 4 digital inputs)
2 /8
Options
UP-CNT8-TTL
adds 8 synchronous counter / encoder or 32 digital inputs, TTL level











via external box ORION-CB-CNT8
UP-CNT8-DIFF
adds 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

via external box ORION-CB-CNT8
CAN bus option
UP-CAN-2
optional 2 high-speed CAN bus interfaces
Video input option
UP-DEWE-CAM-01
adds synchronized video picture acquisition, up to 70 fps at 640 x
480 pixel
Optional sensors
Current / Shunt
5 A / 0.1 Ohm Shunt
Current / Transducers
60, 200, 400, 700, 1000, 2000, 5000 A
Current / Clamps
Various models, e.g.: 150 ADC / 1400 AAC
EMC
ESD
IEC 61000-4-2
EMC
EN 55011
Power supply
Voltage inputs
Current inputs
Surge
IEC 61000-4-5
Burst
IEC 61000-4-4
4 kV
4 kV; L, N, PE
Surge
IEC 61000-4-5: 4 kV
Burst
IEC 61000-4-4: 4 kV
Surge
IEC 61000-4-5: 4 kV
Burst
IEC 61000-4-4: 4 kV
Shock and vibration
Shock
Desktop or rack mount installation only
Vibration
Desktop or rack mount installation only EN 60068-2-6, EN 60721-3-2 class 2M2 MIL-STD 810F 514.5, procedure I
EN 60068-2-27
MIL-STD 810F 516.5, procedure I
Environmental
Operating temperature
0 to +50 °C
0 to +50 °C (0 to +45 with batteries)
Storage temperature
Humidity
Data storage
10 to 80 % non cond., 5 to 95 % rel. humidity
1)
Technology
Hard disk
Capacity
Max. gap free storing to disk
Typ. duration of recording (16 ch. / 10 kS/s/ch. / 16 bit)
Main system
0 to +50 °C
-20 to +70 °C
1000 GB
600 GB
1000 GB
Typ. 70 MB/s
Typ. 80 MB/s
Typ. 70 MB/s
35 days
20 days
35 days
15” TFT (1024 x 768)
17” TFT (1280 x 1024)
1)
Display
-
Processor
Intel® Core™2 Duo 2 GHz
Current transducer power supply 9V
4x Binder 712 socket
Interfaces
4x USB, 2x Ethernet, 1x RS-232
Power supply
Standard
95 to 260 VAC 50 / 60Hz
110 / 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 / 60Hz
110 / 220 VDC
Optional
-
95 to 260 VAC 50 / 60Hz or 110 /
220 VDC
-
Dimensions
Housing
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.)
Weight without batteries
Typ. 12 kg (26.4 lb.)
Typ. 14 kg (31 lb.)
Typ. 17 kg (37.4 lb.)
1)
8
Please find current specifications in the latest price list
2)
Weight of one battery: 660 g (1.45 lb.)
www.de we t ron .com
DEWE-820-PM-1000
DEWE-2600-PM-1000
DEWE-5000-PM-1000
DEWE-820-PM-1000-8: 8
DEWE-820-PM-1000-16: 16
DEWE-2600-PM-1000-8: 8
DEWE-2600-PM-1000-16: 16
DEWE-5000-PM-1000-8: 8
DEWE-5000-PM-1000-16: 16
4x DAQP-HV-S3 and 4x DAQP-LV-B
8x DAQP-HV-S3 and 8x DAQP-LV-B
Simultaneous sampling
1 MS/s
16 bit
DEWE-820-PM-1000-8: 8
DEWE-820-PM-1000-16: 16
DEWE-2600-PM-1000-8: 8
DEWE-2600-PM-1000-16: 16
DEWE-5000-PM-1000-8: 8
DEWE-5000-PM-1000-16: 16
DEWE-820-PM-1000-8: 2 / 8
DEWE-820-PM-1000-16: 4 / 16
DEWE-2600-PM-1000-8: 2 / 8
DEWE-2600-PM-1000-16: 4 / 16
DEWE-5000-PM-1000-8: 2 / 8
DEWE-5000-PM-1000-16: 4 / 16










Power Measurement
Power Measurement

E-Mobility
via external box ORION-CB-CNT8
5 A / 0.1 Ohm Shunt
60, 200, 400, 700, 1000, 2000, 5000 A
Various models, e.g.: 150 ADC / 1400 AAC
IEC 61000-4-2
4 kV
4 kV; L, N, PE
IEC 61000-4-5: 4 kV
IEC 61000-4-4: 4 kV
IEC 61000-4-5: 4 kV
IEC 61000-4-4: 4 kV
Desktop or rack mount installation only
EN 60068-2-27
MIL-STD 810F 516.5, procedure I
Desktop or rack mount installation only
EN 60068-2-6, EN 60721-3-2 class 2M2
MIL-STD 810F 514.5, procedure I
0 to +50 °C
0 to +50 °C (0 to +45 with batteries)
0 to +50 °C
-20 to +70 °C
10 to 80 % non cond., 5 to 95 % rel. humidity
Hard disk
1000 GB
600 GB
1000 GB
Typ. 70 MB/s
Typ. 80 MB/s
Typ. 70 MB/s
35 days
20 days
35 days
15” TFT (1024 x 768)
17” TFT (1280 x 1024)
-
Intel® Core™2 Duo 2 GHz
4x Binder 712 socket
4x USB, 2x Ethernet, 1x RS-232
95 to 260 VAC 50 / 60Hz
110 / 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 / 60Hz
110 / 220 VDC
-
95 to 260 VAC 50 / 60Hz or 110 / 220 VDC
-
19” rack-mount, 4U
Portable instrument
Portable instrument
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.)
Typ. 12 kg (26.4 lb.)
Typ. 14 kg (31 lb.)
Typ. 17 kg (37.4 lb.)
www.dewetron.com/power-measurement
Power Fault Recording
IEC 61000-4-4
Power Network Analysis
EN 55011
IEC 61000-4-5
9
HV Modules
Input ranges unipolar and bipolar
DAQP-HV-S3
HSI-HV
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 V
DC accuracy
20 V and 50 V
100 V to 1400 V
Filter (lowpass)
Filter characteristics
AC accuracy
Frequency accuracy
Angle errors
±0.05 % of reading ±40 mV
±0.05 % of reading ±0.05 % of range
10, 30, 100, 300, 1k, 3k, 10k, 30k, 100k, 700 kHz(1)
Frequency
f/f0
<0.1
0
0.1
0.01
0.2
0.14
0.3
0.72
0.5
4.2
0.75
20
1
40
±1 mHz
Frequency
f/f0
<0.1
0.1
0.2
0.3
0.5
0.75
1
Gain linearity
Error
°
0.001
0.25
0.75
0.8
1
1
1
0.05 % of full scale
Typical 0.5 mV/°K
Typical 5 ppm/°K
max. 4 mV/°K
max. 20 ppm of Range/°K
100 ppm/sqrt (1000 hrs)
10 MOhm
3 dB Bandwidth (DAQP-HV)
700 kHz(2)
Filter selection
2 MHz
Push button or software
10, 30, 100, 300, 1k, 3k, 10k, 30k, 100k, 300 kHz(3,4), 700 kHz(5)
Filter type
50 V
200 V
1400 V
±1 mHz
Frequency
f/f0
<0.1
0.1
0.2
0.3
0.5
0.75
1
Typical 20 ppm/°K (max. 50 ppm/°K)
Input resistance
Typical SFDR and SNR
0.03 % of full scale
Long term stability
Filter (lowpass)
Error
°
0.001
0.25
0.75
0.8
1
1
1
Gain drift range
Offset drift
20 V to 100 V
200 V to 1400 V
100, 300, 1k, 3k, 10k, 30k, 100k, 300k, 1M, 2 MHz(1)
Frequency
f/f0
<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, 300 kHz, 1 MHz, 2 MHz2)
300 kHz
SFDR SNR
98
76
98
84
98
86
100 kHz
SFDR SNR
101
81 dB
101
89 dB
102
91 dB
Typical CMRR
10 kHz
SFDR SNR
108
90 dB
108
91 dB
107
92 dB
CAT III 600
CAT IV 300
±4000 V
±4000 V
Surge (1.2/50)
Burst (5 kHz)
Output voltage
±5 V
Output resistance
<10 Ohm
Output current
5 mA
Output protection
Short to ground for 10 sec.
Power supply
Connector
RS-485 interface
10 kHz
SFDR SNR
108
90 dB
108
91 dB
107
92 dB
Line to Ground 1.4 kVrms
Line to Line 1.8 kVrms
Protection
Power On default settings
100 kHz
SFDR SNR
101
81 dB
101
89 dB
102
91 dB
>80 dB @ 50 Hz
70 dB @ 400 Hz
60 dB @ 1 kHz
48 dB @ 10 kHz
Isolation voltage
Power consumption
1 MHz
SFDR SNR
98
76
98
84
98
86
±9 VDC ± 1%
0.7 W
1W
Software programable
-B
-SC
Yes
20 V and 50 V bandwidth limited to 1 MHz
1 MHz exclusively for Bessel filter characteristic
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
1)
2)
3)
10
www.de we t ron .co m
Power Measurement
Push button selectable ranges
Filter (lowpass)
Filter characteristics
AC accuracy
Frequency accuracy
Angle errors
Accuracy
±0.02 % of reading ±40 µV
±0.05 % of range
±0.04 % of reading ±40 µV
±0.05 % of range
Range
10 mV to 50 mV
100 mV to 50 V
10 mV to 50 mV
100 mV to 50 V
10, 30, 100, 300, 1k, 3k, 10k, 30k, 100k, 300 kHz(1)
Frequency
f/f0
<0.1
0
0.1
0.01
0.2
0.14
0.3
0.72
0.5
4.2
0.75
20
1
40
±1 mHz
Frequency
f/f0
<0.1
0.1
0.2
0.3
0.5
0.75
1
Input coupling
100, 300, 1k, 3k, 10k, 30k, 100k, 300k, 1M, 2 MHz(1)
Frequency
f/f0
<0.1
0
0.1
0.01
0.2
0.14
0.3
0.72
0.5
4.2
0.75
20
1
40
Error
°
0.001
0.25
0.75
0.8
1
1
1
±1 mHz
Frequency
f/f0
<0.1
0.1
0.2
0.3
0.5
0.75
1
0.01 % of full scale
Gain drift range
0.03 % of full scale
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/°K
Long term stability
100 ppm/sqrt (1000 hrs)
Input resistance
1 MOhm
Bandwidth (-3 dB)
300 kHz
2 MHz
Filter selection
Push button or software
10 Hz, 30 Hz, 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30
kHz, 100 kHz, 300 kHz
Filters (low pass)
Filter characteristics
Typical SFDR and SNR:
300 kHz
SFDR SNR
100 dB 72 dB
102 dB 82 dB 102 dB 82 dB
Typical CMRR
10 Hz to 100 kHz:
300 kHz:
100 kHz SFDR SNR
98 dB 76 dB
99 dB 93 dB
99 dB 93 dB
100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz,
300 kHz, 1 MHz
Butterworth or Bessel 40 dB/dec (2nd order; ±1.5 dB @ f0)
Bessel 60 dB/dec (3rd order; 0 to -3 dB @ 300kHz)
10 kHz
SFDR SNR
97 dB 84 dB
97 dB 96 dB
97 dB 96 dB
1 MHz
SFDR SNR
100 dB 72 dB
102 dB 82 dB 102 dB 82 dB
10 mV to 1 V range:
>100 dB @ 50 Hz
>100 dB @ 1 kHz
83 dB @ 10 kHz
Input overvoltage protection
100 kHz SFDR SNR
98 dB 76 dB
99 dB 93 dB
99 dB 93 dB
10 kHz
SFDR SNR
97 dB 84 dB
97 dB 96 dB
97 dB 96 dB
2.5 V to 50 V range:
90 dB @ 50 Hz
65 dB @ 1 kHz
55 dB @ 10 kHz
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 V
Output resistance
<10 Ohm
Maximum output current
5 mA
Output protection
Short to ground for 10 sec.
Power On default settings
Software programable
Power supply
±9 VDC ±1 %
Power consumption
0.8 W without sensor supply
Connector
-B
RS-485 interface
-SC
-SUBD
-LEMO
-BNC
Yes
TEDS
Hardware support for TEDS (Transducer Electronic Data Sheet) (SUBD Type only)
Supported TEDS chips
Supported MSI
Error
°
0.001
0.25
0.75
0.8
1
1
1
DC or AC software selectable (1.5 Hz standard, custom on request down to 0.01 Hz)
Gain linearity
20 mV
1V
50 V
Accuracy
±0.05 % of reading ±40 µV
±0.05 % of range
±0.08 % of reading ±40 µV
±0.05 % of range
Power Network Analysis
Unipolar
10 mV, 50 mV, 200 mV, 1 V, 5 V, 10 V, 50 V
Range
10 mV to 50 mV
100 mV to 50 V 10 mV to 50 mV
100 mV to 50 V
Power Fault Recording
DC accuracy
Bipolar
HSI-LV
10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2.5 V, 5 V, 10 V, 25 V, 50 V
E-Mobility
DAQP-LV
Input ranges unipolar and bipolar
Power Measurement
LV Modules
DS2406, DS2430A, DS2432, DS2433, DS2431
MSI-V-ACC; MSI-V-RTD
MSI-V-ACC; MSI-V-RTD, MSI-V-CH-50
300 kHz exclusively for Bessel filter characteristic
2)
Overall current should not exceed DEWE-30-xx maximum power
1)
www.dewetron.com/power-measurement
11
High Precision
Current Transducers
Three to six channels
Models from 200 A pk to 1000 A pk
High linearity
Low offset
High bandwidth
Low phase error
Power supply PM-MCTS
Model overview 60 A - 1000 A
Specifications
Model
PM-MCTC 60
PM-MCTS 200
PM-MCTS 400
PM-MCTS 700
PM-MCTS 1000
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 A
RMS Sinus
40 A
140 A
280 A
500 A
700 A
Transducer
Primary Current Range
Normal 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)
DC … 1 MHz
DC … 1 MHz
DC … 500 kHz
DC … 250 kHz
DC … 1 MHz
1 ppm/K
1 ppm/K
1 ppm/K
1 ppm/K
1 ppm/K
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 %
0.03 %/kHz
0.03 %/kHz
0.06 %/kHz
0.12 %/kHz
0.03 %/kHz
0.01° + 0.045°/kHz
0.01° + 0.045°/kHz
0.01° + 0.06°/kHz
0.01° + 0.12°/kHz
0.01° + 0.045°/kHz
PM-MCTS-BR5
PM-MCTS-BR5
PM-MCTS-BR5
PM-MCTS-BR5
PM-MCTS-BR1
Bandwidth
Temperature Influence
Output Ratio
Frequency Influence
Angular Influence
Shunt
Amplitude-/ phase-error depending on frequency
100.000
Amplitude-error depending on range (DC)
10.000
10.000
1.000
1.000
0.100
0.100
Phase-error
0.010
0.010
Amplitude-error
0.001
0
5
Amplitude-error (%)
0.001
50
500
5000
50000
500000
0
20
Frequency (Hz)
12
60
80
100
Range (%)
Nominal Current Range
Optional Shunts PM-MCTS-BR1
40
Basic Three
Channel System
Current Channel
Optional Shunt
60 A (Transducer PM-867-60I)
PM-MCTS-60
PM-CM-60
PM-MCTS-BR5
200 A (Transducer PM-867-200I)
PM-MCTS-200
PM-CM-200
PM-MCTS-BR5
400 A (Transducer PM-867-400I)
PM-MCTS-400
PM-CM-400
PM-MCTS-BR5
700 A (Transducer PM-867-700I)
PM-MCTS-700
PM-CM-700
PM-MCTS-BR5
1000 A (Transducer PM-867-1000IHF)
PM-MCTS-1000
PM-CM-1000
PM-MCTS-BR1
- MCTS Rack
- 1 internal Power Supply
- 3 internal Power Supplies
- 1 Connection Cable
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 W
- 3 Connection Cables 10 m
- Power Cord
for 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 kHz
Frequency Range
300 kHz / 0.5 dB
300 kHz / 0.5 dB
300 kHz / 0.5 dB
- 1 Plug-On Shunt
www.de we t ron .com
Power Measurement
PM-SATURN-5000U-140
2000 A
125 A
5000 A
250 A
2000 A
125 A
5000 A
250 A
Bipolar
Bipolar
± 1.0 A
± 2.0 A
1.5 Ω
0.75 Ω
15 %
15 %
15 %
15 %
500 % (0.1 s)
1000 % (0.1 s)
500 % (0.1 s)
1000 % (0.1 s)
Absolute calibration (23 ºC amb.)
±10 V
5 mA
-
-
< 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
< 0.5 ppm/ºC
< 1 ppm/month
< 0.5 ppm/ºC
< 1 ppm/month
< 0.6 ppm/ºC
< 1 ppm/month
< 0.6 ppm/ºC
< 1 ppm/month
< 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
< 10 µV
< 10 µV
< 10 µV
< 10 µV
> 20 A / µS
> 20 A / µS
> 20 A / µS
> 20 A / µS
< 1 uS
< 1 uS
< 1 uS
< 1 uS
0 – 300 kHz
(<5 % of Ip)
0 – 50 kHz
(<5 % of Ip)
0 – 300 kHz
(<5 % of Ip)
0 – 50 kHz
(<5 % of Ip)
Output noise (RMS)
DC - 10 Hz
DC - 10 kHz
DC - 50 kHz
Noise feedback to main conductor
DC – 100 kHz (RMS)
Dynamic response correctly
followed to 0.1%
Delay time
Bandwidth
(3 dB, small signal 0.5%)
Test voltages
5 KV ACRMS
5 KV ACRMS
Operating temperature
Electronics
10 - 40 ºC
0 - 55 ºC
10 - 40 ºC
0 - 55 ºC
Supply voltages
Supply current/power
Busbar free zone to be within linearity spec.
Cylinder shape (diameter x length)
Cable length
Standard
Optional
Electronics
Dimension
Weight
Dimension
Weight
100 / 115 / 230 VAC, +/-10 % -50/60 Hz
100 / 115 / 230 VAC, +/-10 % - 50/60 Hz
50 VA
100 VA
50 VA
100 VA
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
2.5 m
30 m
2.5 m
30 m
2.5 m
30 m
2.5 m
30 m
Rack mount
483 x 89 x 371 mm (19 x 3.5 x 14.6 in.)
5 kg (11.1 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.)
Rack mount
483 x 89 x 371 mm (19 x 3.5 x 14.6 in.)
5 kg (11.1 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.)
2 models of current transducer systems
2000 A
E-Mobility
PM-SATURN-2000U
Polarity
Nom. output range
Voltage Output
PM-SATURN-5000I-140
Power Network Analysis
Primary Nominal current (Ipn)
Programmable in steps of
Current Output
PM-SATURN-2000IHF
Power Fault Recording
ULTRASTAB SATURN
Power Measurement
2000 A - 5000 A
5000 A
www.dewetron.com/power-measurement
13
Shunts & Current Clamps
Shunts
DAQ-SHUNT-3
DAQ-SHUNT-4
DAQ-SHUNT-5
Application
Power grid analysis
Power grid analysis
Power grid analysis
Type of current
AC + DC
AC + DC
AC + DC
Impedance
0.1 Ohm
0.1 Ohm
0.1 Ohm
Accuracy
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 jacks
Output: 30 cm cable with
banana plugs
Input: built-in banana jacks
Output: built-in banana jacks
PNA-CLAMP-150-DC
Current range
Cont. current measurement
Power supply
OPTION for
* DEWE-2600/2602:
* For others:
Connector
±15 V ±10 %, external
0.5U-CLAMP-DC-POWER-4/-8
CLAMP-DC-POWER-4/-8
Output sensitivity
20 mV/A (w.r.t. 0 V)
Accuracy (+ 25 °C)
±1 % of reading ±2 mA
Resolution
±1 mA
Frequency Range
DC to 100 kHz (-1 dB)
Max. conductor size
32 mm diameter
Jaw status
0 V (Lo) / +15 V (Hi)
Relative zero correction
Auto zero at switch on
SUB D(TED); (SUBD modules
required for TEDS support)
Supply (LEMO; incl. jaws
D-banana included
PNA-CLAMP-1000-DC
AC input range
0.2 to 100 A
selectable
0.5 to 1000 A
DC input range
0.4 to 150 A
selectable
0.5 to 1400 A
Output
10 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 %
2.5 %
800 to 1000 A
4%
1000 to 1400 A
4%
1 mV/A
Bandwidth
DC to 10 kHz at -3 dB
Phase 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
Connector type
Safty banana sockets (4 mm)
≤ 0.3 % of output signal per 10K
Fits to following systems All system with DAQ series amplifiers
Flexible current loop with selectable range (PNA-A100-300-45)
Application
Power grid analysis, AC applications
AC input range
0.5 to 300 A
Output
10 mV/A
% accuracy
Phase shift (45 to 65 Hz)
Temperature drift
0.5 to 3000 A
selectable
1 mV/A
5 to 300 A
<= 1 %
5 to 300 A
<= 1 %
0.5 to 300 A
<= 0.7°
0.5 to 300 A
<= 0.7°
<±50 ppm/K (-10 °C to 55 °C)
PNA-FLEX-MINI-300-70 (PNA-A100-300-80)
AC input range
0.5 to 300 A
Output
10 mV/A
0.5 to 3000 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%
selectable
1 mV/A
Bandwidth
10 Hz ... 20 kHz
Phase 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 cm
Fits to following systems DEWE-5xx-PNA
DEWE-5xx-PNA-1MS
14
www.de we t ron .co m
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 Measurement
Power Errors
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°
Current Error
EC [%]
Phase Error
EPhi [°]
Cos Error
EcosPhi [%]
Sin Error
EsinPhi [%]
Power
ES [%]
0,15 %
Active Power
EP [%]
0,15 %
Reactive Power
EQ [%]
0,15 %
40
10
200
10
Power Network Analysis
EV [%]
Power Fault Recording
Voltage Error
E-Mobility
Example:
ftp://ftp.dewetron.com/public/power/dewe power accuracy.xls
www.dewetron.com/power-measurement
15
Accuracy Example MCTS 200
Voltage [V]:
100
Current module:
DAQP-LV
Current [A]:
140 A
Range:
1V
Frequency [Hz]:50
Filter:
300 kHz
Phi [°]:
Shunt:
PM-BR5
30
Current Transducer: PM-MCTS-200
Voltage module:
DAQP-HV-S3
Range:
200 V
Filter:
700 kHz
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 (f max = 50 000 Hz)
16
www.de we t ron .co m
Voltage [V]:
100
Current module:
DAQP-LA
Current [A]:
5A
Range:
10 A
Filter:
300 kHz
Voltage module:
DAQP-HV-S3
Range:
200 V
Filter:
700 kHz
Frequency [Hz]:50
Phi [°]:
Power Measurement
Accuracy Example DAQP-LA
30
E-Mobility
Maximum P-error and Q, S as function of Phi
Maximum P-error as function of frequency with cariable current/max current (f max = 50 000 Hz)
www.dewetron.com/power-measurement
Power Fault Recording
Power Network Analysis
Maximum P-error as function of current for different cosPhi
17
Measuring on Electrical Machines
Application Example for Power Measurement
Introduction Moment M
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 therefore necessary. Such drives
of power electronics and all
Motor
implications connected with
Operating
that such as circuit feedback,
point
of current and voltage, pulsefrequency modulated signals
ine
g
En
and fast slew rates of the voltage impulses.
Speed frequency n
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 following 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.
Solution
DEWETRON‘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.
18
www.de we t ron .co m
Electrical Machines
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
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)
Power Measurement
4 kV electric strength
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
Analysis as regards grid, motor, intermediate circuit and – mechanically – the drive shaft (Welle)
Voltages up to 1000 V RMS 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
E-Mobility
DC-measurements in the frequency converter
Acoustic emission (sound power level, frequency spectrum)
Software
The option power for the DEWESoft is a very high-capacity tool for the calculation of power and other similar parameters. 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 correction 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 Modules
Power Fault Recording
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 parameters 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 contribution to the interference resistance is the high electric strength.
Power Network Analysis
Hardware
With the DEWESoft power module an arbitrary number of power modules can be measured at the same time. Motors
e.g. Ugrid/UDC/Umotor
www.dewetron.com/power-measurement
19
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 OPC
The 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 Measurement
Accurate and high-resolution acoustic level measurements according to IEC 60651, 60804, 61672. With its userfriendly 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
20
www.de we t ron .co m
Transformers
Measuring on Transformers
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 contribute 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.
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.
E-Mobility
Power Measurement
Application Example for Power Measurement
Hardware
Based on the new DEWE-PM series it is quite easy to define the adequate hardware 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.
can be measured.
Power Fault Recording
Software/Calibration
Power Network Analysis
Solution
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 possible according to IEC 60076-1.
www.dewetron.com/power-measurement
21
Some Details
Various Power Modules
With the DEWESoft power module an arbitrary number of power lines can be measured simultaneously. e.g. transformer: Uprim / Usek / Ueb / U
FFT– Harmonics Analysis
U, ULine, I, P, cos
and Q
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 Diagram
The „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-OPC
With 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 instruments (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 customer.
Customers
All producers of transformers (ranging from power
transformers to distribution transformers)
Companies responsible for maintenance and energy supply
companies
Energy supply companies
22
www.de we t ron .com
400 Hz (800 Hz) Machines
Measuring on 400 Hz (800 Hz) Machines
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.
Power Measurement
Application Example for Power Measurement
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.
E-Mobility
Harmonics measurement
Power measurement
Determination of power factor
Voltage fluctuation
Transients
Efficiency factor
Solution
DEWETRON‘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
Power Network Analysis
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.
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 independently from the fact that a 19’’ instrument for a fixed installation or a portable
instrument is used.
www.dewetron.com/power-measurement
Power Fault Recording
Several power modules in one instrument
23
Software
The 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 Modules
With the DEWESoft power module an arbitrary number of power modules can be measured at the same time. Motors
e.g. Ugrid / U DC / Umotor
FFT– Harmonics Analysis
U, ULine, I, P, cos
and Q
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 • sales@dewetron.com
24
www.de we t ron .co m