Main Sector of relevance\IRC classification 6. Energy
6.7 IMTB device for contactless measurement of low currents
Developers’ contact information
State Scientific Institution “The Institute of Applied Physics of the National Academy of Sciences of Belarus”
16 Akademicheskaya Street, Minsk BY-220072
Summary
The device is used for measurement, calculation and analysis of open-circuit transformer characteristics that give objective information about the technical condition of a unit.
Description
The device consists of an electronic package and a transmitter.
The transmitter contains a magneto-sensitive sensor (magnetoresistor), ring
magnet, magnetic screening system and constructively made as a detachable one
under the “pincers principle”. It makes possible to perform contactless
measurement of current in current distributors with a diameter of max. 10 mm
included. A signal read from the sensor and proportional to the measured
alternate current value is shown after appropriate processing at the electronic
package display in μA. The display has a built-in keyboard for control. IMTB
device is portable.
:
| Measured current frequency | 50 Hz |
| Effective value range of measured current | 20…2000 μA |
| Self-contained supply of the device, from AA type batteries | 6 V |
| Power consumption, max | 2 W |
| Overall dimensions, max., mm | |
| of the electronic package | 235×130×60 |
| of the primary converter | 200×65×50 |
| Weight, max., kg | |
| of the electronic package | 0,8 |
| of the primary converter | 0,4 |
Technology type
Technical advantages and economic benefits
High sensitivity to measured magnet fields of low currents, the possibility to carry out insulation tests of high-voltage equipment under operation conditions.
Technology differentiation and uniqueness
The improved methods of magneto-sensitive sensor screening and information processing are in operation. They make it possible to a great degree to reduce the influence of interfering electromagnetic fields on measurement results.
Context in which technology was identified
The devices are used at Minsk electrical supply directions of the Belarusian railway.
Technological keywords
Noncontact measurement techniques, high-voltage equipment, surface-leakage current, insulation.
Development Stage
Intellectual property rights
Range of applications
Electric-power industry.
Classifier Used at the EU Innovation Relay Centres
Preferable Regions
Practical experience
The device is used at electrical energy enterprises.
Environmental impact
None.
Type of collaboration sought
Terms and restrictions
On a contract basis.
Available technical assistance