Kev ceev faj rau tam sim no transformers

Tam sim no Transformer - Kev ceev faj rau kev siv Thaum lub transformer tam sim no tab tom khiav, ob sab tsis pub qhib. Vim hais tias ib zaug lub Circuit Court raug qhib, thawj sab tam sim no dhau los ua qhov excitation tam sim no, uas ua rau cov hlau nplaum flux thiab lwm qhov hluav taws xob sab nraud zoo heev tshaj li tus nqi ib txwm muaj thiab ua rau muaj kev nyab xeeb ntawm tib neeg thiab khoom siv. Yog li ntawd, nws tsis raug tso cai los txuas fuses nyob rau hauv lub thib ob Circuit Court ntawm lub tam sim no transformer, thiab nws tsis pub kom tshem tawm ammeter, relay thiab lwm yam khoom siv yam tsis tau bypassing thaum lub sij hawm ua hauj lwm.

Thaum lub tshuab hluav taws xob tam sim no khiav, qhov thib ob tsis tso cai rau qhib Circuit Court. Cov laj thawj yog raws li nram no:

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.