PCT832 precision current transducer

Electrical Specification

(Customized is available)

Current Transformer

When the secondary side of the current transformer is open, according to the knowledge, the demagnetization function of the secondary side disappears, the primary current becomes the excitation adjustment current, and the total magnetic flux of the iron core increases, the rate of change of ΔΦ/Δt increases.

As known from the magnetic induction potential formula, the induced electromotive force will become larger and larger, resulting in a higher working voltage. There is a serious risk for the machinery and equipment connected to the secondary side and related workers.

Therefore, the current transformer has a second open circuit, the secondary operating voltage is high, and the iron core is saturated again. The magnetic induction strength is limited.

As is known from the magnetic flux formula Φ=BS, a certain cross-sectional area S in the direction of the magnetic field will not change, and the magnetic induction When the strength B is raised to the limit, the Φ induced electromotive force is getting higher and higher, the iron core is very hot, and the insulation of the secondary side electromagnetic coil is damaged.