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Overview










Open loop Hall effect

technology






ABB current sensors based on open loop Hall

effect technology are also electronic






transformers. They allow for the

measurement of direct, alternating and impulse






currents, with galvanic insulation between

the primary and secondary circuits.






The primary current IP flowing across the

sensor creates a primary magnetic flux.






The magnetic circuit channels this magnetic

flux. The Hall probe placed in the air






gap of the magnetic circuit provides a

voltage VH proportional to this flux, which is






itself proportional to the current IP to be

measured.






The electronic circuit amplifies this Hall

voltage (VH) allowing it to be directly






exploited by the operator as a secondary

output voltage VS.






The current sensor measures instantaneous

values.






 





Advantages










The main advantages of this open loop





Hall effect technology are as follows:





Galvanic insulation between the primary





and secondary circuits.





Measurement of all waveforms is





possible: direct current, alternating





current, impulse, etc.





Good accuracy over a medium frequency





range (from direct to several tens of kHz).





High reliability.





Low power consumption.





Reduced weight and volume.





Excellent Performance/Cost ratio.














Application










Variable speed drives, backups (UPS),





active harmonic filters, battery chargers,





conveyers, lifts, cranes, solar inverter,





etc.


















Type










HBO100





HBO200





HBO300





HBO400





HBO500





HBO600





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