Prekawzjonijiet għat-trasformaturi tal-kurrent

Transformer tal-kurrent - Prekawzjonijiet għall-użu Meta t-transformer tal-kurrent ikun qed jaħdem, in-naħa sekondarja ma titħalliex tiftaħ. Minħabba li ladarba ċ-ċirkwit jinfetaħ, il-kurrent tal-ġenb primarju jsir il-kurrent ta 'eċċitazzjoni, li jagħmel il-fluss manjetiku u l-vultaġġ tal-ġenb sekondarju jaqbeż ħafna l-valur normali u jipperikola s-sigurtà tan-nies u t-tagħmir. Għalhekk, mhux permess li jgħaqqdu fjusis fiċ-ċirkwit sekondarju tat-transformer tal-kurrent, u mhux permess li jitneħħew l-ammeter, ir-relay u tagħmir ieħor mingħajr ma jinjora waqt it-tħaddim.

Meta t-transformer tal-kurrent ikun qed jaħdem, in-naħa sekondarja mhix permessa tiftaħ iċ-ċirkwit. Ir-raġunijiet huma kif ġej:

⒈ The primary measured current magnetic potential I1N1 of the current transformer generates a magnetic flux Φ1 in the iron core

⒉ The current magnetic potential I2N2 of the secondary measuring instrument of the current transformer generates a magnetic flux Φ2 in the iron core

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

⒋ Because Φ1.Φ2 are opposite in direction, equal in size and cancel each other, so Φ = 0

⒌ If the secondary open circuit, that is, I2 = 0, then: Φ = Φ1, the magnetic flux of the current transformer iron core is very strong, saturated, the iron core heats up, the insulation is burned out, and leakage occurs

⒍ If the secondary open circuit, that is, I2 = 0, then: Φ = Φ1, Φ generates a high induced potential e in the secondary coil N2 of the current transformer, and a high voltage is formed at both ends of the secondary coil of the current transformer, endangering the operation. Personnel life safety

⒎ One end of the secondary coil of the current transformer is grounded, which is a protective measure to prevent the danger of high voltage.