Isabellenhütte achieves record current measurement on shunt basis
30,000 amperes measured, 100,000 amperes next target
High-current measuring module(firmenpresse) - Isabellenhütte Heusler GmbH & Co. KG, Hesse, Germany, has made inroads into the high-current range of industrial applications with shunt current measurement. The measurement of currents of up to 30,000 amperes using low-ohmic shunts can truly be seen as unique. Moreover, the company’s next target is 100,000 amperes.
For a customer from the drive application sector, Isabellenhütte developed a 1-µOhm shunt that is capable of consistently measuring 30,000 amperes on an inverter for high-performance drive control units. With its massive Cu connections, the new, compact 1-µOhm shunt is suited for direct installation to the busbar system. The resistor inside the shunt is made of the electron-beam-welded composite material Cu-Manganin-Cu. Side-mounted steel plates guarantee mechanical stability and prevent external momenta from being transmitted to the manganin strips during installation.
Because internal thermal resistance is less than 5 mK/W, the peak power loss (900 Watts) at 30,000 amperes only increases the resistor material’s hot spot temperature by approximately 4.5 kelvin.
The electric properties are comparable with those of the best mOhm shunts:
•Resistance: 1 µOhm
•Temperature coefficient: TC < 20 ppm/K
•Thermal EMF against Cu (20-60 °C): Uth < 0.2 µV/K
•Long term stability (140 °C, 2000 h): dR/R < 0.2 %
Measurement system allows overcurrents of up to 300,000 amperes
A measurement system inside the shunt with precision converters and microcontrollers takes care of 16-bit data acquisition, recording, calibration and processing.
The internal sampling rate of 4 kHz measures even rapid signal changes. Thanks to its directly assembled measurement system, the shunt provides a high level of EMC stability (electromagnetic compatibility) and noise suppression. Temperature recording of the internal shunt and measurement system helps largely eliminate the temperature coefficient. Rapid switching between areas even makes it possible to measure short-term overcurrents of up to 300,000 amperes.
Further unique features of the high-current measuring module
An analogue low-pass filter plus an additional configurable digital filter limit the measuring channel’s bandwidth to approximately 500 Hz to avoid aliasing while still allowing DC and 50/60-HZ AC measurements. The high-current measuring module only needs a few Watts, even including data transfer. A high voltage cable with an external, electrically isolated mains adaptor supplies the IMV with power. The module also has an insulation stability of 20 kV.
Rapid, bidirectional data transfer is provided by a serial interface via optic fibre (glass or plastic). Data can also be transmitted via CAN, ethernet or other types of interface. Standard secure data transfer contains a status byte, a 16-bit CRC check word, the temperature, as well as current measurements in the 30 kA and 300 kA ranges.
A remote station is available upon request, which provides insulated power and converts the proprietary internal protocol to any external protocol, such as standardised industrial bus systems.
Themen in dieser Pressemitteilung:
isabellenhuette
shunt-current-measurement
high-current-measuring-module
30-000-amperes
pcim
module-20ka-shunt
Unternehmensinformation / Kurzprofil:
Isabellenhütte Heusler GmbH & Co. KG is a leader in the field of shunt-based current measurement technology. The company has combined its precision measuring systems under the new brand name ISAscale®. The company has been owned by the Heusler family since 1827. Around 650 staff are employed at its headquarters and production site in Dillenburg, Hesse.
Isabellenhütte Heusler GmbH & Co. KG
Eibacher Weg 3 - 5
D-35683 Dillenburg
Jens Hartmann
Sales Director ISAscale
Tel.: +49 2771 / 934-250
Mobil: +49 170 / 779 083-0
jens.hartmann(at)isabellenhuette.de
Wassenberg Public Relations für
Industrie & Technologie GmbH
Rollnerstr. 43
D-90408 Nürnberg
Michaela Wassenberg
Tel.: +49 911 / 598 398-0
Fax: +49 911 / 598 398-18
presse(at)tech-communications.net
Datum: 19.04.2012 - 11:31 Uhr
Sprache: Deutsch
News-ID 136825
Anzahl Zeichen: 3334
contact information:
Contact person: Jens Hartmann
Town:
35683 Dillenburg
Phone: 02771 / 934-250
Kategorie:
Electronics & Semiconductors
Typ of Press Release: Erfolgsprojekt
type of sending: Veröffentlichung
Date of sending: 19.04.2012
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"Isabellenhütte achieves record current measurement on shunt basis"
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