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