Page 9 - Current & voltage sensors catalog

2. Electronic technology
1

Principle
ABB current sensors are based on entirely electronic technology. In contrast to closed Sensor Power supply
+
or open loop Hall effect technology, no magnetic circuit is used in the sensor. I P + V A
0V
They allow for the measurement of direct, alternating and impulse currents with galvanic 0V
insulation between the primary and secondary circuits. Σ V S R M 0V
The primary current I P flowing across the sensor creates a primary magnetic flux. V M
R M
U I S I S 0V
The different Hall probes included in the sensor measure this magnetic flux. The I
_ V M
_ V A G0215DG
electronic circuit conditions and treats these signals (summation and amplification)
to provide two output currents I S1 and I S2 and/or two output voltages V S1 and V S2.
All the outputs are exactly proportional to the measured primary current.
The current sensor measures instantaneous values.

Advantages Applications
The main advantages of this electronic Industry Substation
technology are as follows: Electrolysis, rectifiers, welding, etc. Substations in continuous voltage.
– Galvanic insulation between the
primary and secondary circuits
– Measurement of all waveforms is
possible: direct current, alternating
current, impulse, etc.
– Choice of output type (current or
voltage, I PN or I PMAX)
– Very large current measuring range (up
to 40 kA) without overheating the sensor
– High dynamic performance
– Low power consumption
– Reduced weight and volume
– Simplified mechanical fixing.

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