Réamhchúraimí do chlaochladáin reatha

Trasfhoirmeoir Reatha - Réamhchúraimí úsáide Nuair atá an claochladán reatha ag rith, ní cheadaítear an taobh tánaisteach a oscailt. Toisc go n-osclaítear an ciorcad, is é an sruth taobh bunscoile an sruth excitation, rud a fhágann go sáraíonn an flosc maighnéadach agus an voltas taobh tánaisteach go mór an gnáthluach agus a chuireann sábháilteacht daoine agus trealaimh i mbaol. Dá bhrí sin, ní cheadaítear fiúsanna a nascadh i gciorcad tánaisteach an claochladáin reatha, agus ní cheadaítear an t-aimpmhéadar, an sealaíochta agus an trealamh eile a bhaint gan seachaint le linn oibriú.

Nuair a bhíonn an claochladán reatha ag rith, níl cead ag an taobh tánaisteach ciorcad a oscailt. Is iad seo a leanas na cúiseanna:

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.