The reason why the secondary side is not allowed to open circuit when the current transformer is running

⒈The magnetic potential I1N1 of the measured current of the current transformer once causes the magnetic flux Φ1 in the transformer iron core

⒉Current transformer secondary detection instrument current volume magnetic potential I2N2 causes magnetic flux Φ2 in the transformer core

⒊Current transformer transformer core combined magnetic flux: Φ=Φ1+Φ2

⒋Since the directions of Φ1 and Φ2 are reversed, the dimensions are the same, and they offset each other, so Φ=0

⒌If the secondary lead, that is, I2=0, then: Φ=Φ1, the magnetic flux of the iron core of the current transformer transformer is very strong, in a saturated state, the iron core is hot, the insulating layer is burned, and the electric leakage is caused.

6. If the secondary lead, that is, I2=0, then: Φ=Φ1, Φ produces a high induced current potential difference e in the secondary electromagnetic coil N2 of the current transformer, and generates high voltage on both sides of the secondary electromagnetic coil of the current transformer , seriously endangering the personal safety of the staff

⒎ The grounding device at one end of the secondary electromagnetic coil of the current transformer is a safeguard measure adopted to better avoid high voltage dangers.