The so-called magnetic saturation of the open-ended current sensor mainly means that the magnetic flux density in the electromagnetic current transformer core is no longer increased by the increase of the primary current after the magnetic flux density in the core of the electromagnetic current transformer is greater than the saturation magnetic flux density.
Magnetic saturation cause of Split Core Current Transducer
The magnetic flux density is an alternating variable. When magnetic saturation is not occurring, the maximum value of the magnetic flux density of the transformer core is: Bm=E2/(4.44*f*N2*S) where E2 is the secondary winding induced electromotive force. Equal to the secondary winding output voltage. N2 is the number of turns of the secondary winding, and S is the cross-sectional area of the core. For fixed transformers, N2 and S are constant values.
The core flux density of an Split Core Current Transducer is proportional to the secondary voltage and inversely proportional to the current frequency.
The secondary voltage is determined by the secondary current and the secondary load. It can be seen that the magnetic saturation of the electromagnetic current transformer has the following reasons:
A, the primary current is too large, greater than the rated current.
B, the secondary load is too large, greater than the rated secondary load.
C, the current frequency is too low, lower than the rated frequency.www.ctsensorducer.com