Tsunan Da Tan | Tsunan Da Karamin Rake | Tsunan Da Maimakon Rake

Muhimmin Tan Delta Test

Idan kuma mai hagu daidai ya sauka da kasa da karamin yaki, yana iya shiga kyau a matsayin capacitor. A cikin insulator mai kyau, saboda abincin da take daidai a matsayin dielectric, ya zama 100% daidai, na'ura mai kyau wanda ke gudana a kan insulator, tana da muhimmin capacitive kawai. Ba a bani muhimmin resistive ba, wanda ke shiga daga kasa zuwa karamin yaki a kan insulator, domin a cikin abincin mai kyau, akwai lissafi ɗaya.

A cikin capacitor mai kyau, na'ura mai kyau mai capacitive ta fi karfin jirgin ruwa da aka bayar voltage 90o.
A cikin yanayi, ba a zama zan iya samun insulator 100% daidai. Saboda damar insulators, wurare da kuma mutanen yankin suna zama suka shiga. Wannan wurare suna bayar hanyar zaɓi don na'ura. Tabbacin, na'ura mai leakage mai electric wanda ke shiga daga kasa zuwa karamin yaki a kan insulator, tana da muhimmin resistive.

Saboda haka, ba a tabbas zan iya cewa, don insulator mai kyau, wannan muhimmin resistive mai na'ura mai electric leakage tana da tsawon daidai. Bisa ga haka, kyakkyawan insulator mai electric tana iya samun da ratio na muhimmin resistive zuwa muhimmin capacitive. Don insulator mai kyau, wannan ratio tana da tsawon daidai. Wannan ratio tana a sanar da tanδ ko tan delta. Yana iya amfani da ita a matsayin dissipation factor.

A cikin diagram mai vector, jirgin ruwa na system an rubuta a kan x-axis. Na'ura mai conductive electric current, ya ni muhimmin resistive na na'ura mai leakage current, IR tana da x-axis.
Saboda muhimmin capacitive na na'ura mai leakage electric current IC tana fi karfin jirgin ruwa da aka bayar 90o, tana da y-axis.
Ta haka, total leakage electric current IL(Ic + IR) tana yi fuskantar δ (yadda) tare da y-axis.
Ta haka, daga diagram, tana cikakken, ratio, IR zuwa IC tana da tanδ ko tan delta.

NB: Wannan fuskantar δ tana a sanar da loss angle.

Yadda a Yi Tan Delta Testing

Kable, winding, current transformer, potential transformer, transformer bushing, inda tan delta test ko dissipation factor test tana da shiga, tana da shiga daga system. Jirgin ruwa mai kyau tana da shiga a kan equipment wanda tana da shiga a kan insulation.

Tafin, jirgin ruwa mai normal tana da shiga. Idan value na tan delta tana da kyau, tana sanya jirgin ruwa zuwa 1.5 zuwa 2 marubucin jirgin ruwa na normal, na equipment. tan delta controller unit tana ci gaba-gaban tan delta values. A loss angle analyzer tana da shiga a kan tan delta measuring unit don bayyana tan delta values a kan jirgin ruwa mai normal da jirgin ruwa masu yawan adadin ruwa.

A cikin test, tana da kyau a bayyana jirgin ruwa a kan frequency mai kyau.

Dalilin Bayyana Frequency Mai Kyau

Idan frequency na jirgin ruwa da aka bayar tana da yawa, tana zama capacitive reactance na insulator tana da tsawon daidai, tana da muhimmin capacitive na na'ura mai electric tana da yawan adadin ruwa. Muhimmin resistive tana da tsawon daidai; tana da shiga a kan jirgin ruwa da conductivity na insulator. A cikin frequency mai yawa, saboda muhimmin capacitive tana da yawan adadin ruwa, amplitude na vector sum na muhimmin capacitive da resistive tana da yawan adadin ruwa.

Saboda haka, power mai zaruri don tan delta test tana da yawan adadin ruwa wanda ba da kyau. Saboda haka, don ci gaba-gaban power requirement don dissipation factor test, tana da kyau a bayyana jirgin ruwa mai kyau. Frequency range na tan delta test tana da 0.1 zuwa 0.01 Hz, tare da inganci da nature na insulation.

Akwai dalili na biyu wanda tana da kyau a ci gaba-gaban frequency mai kyau.

Saboda a nan, tanδ ∝ 1/f.
Saboda haka, a cikin frequency mai kyau, number na tan delta tana da yawan adadin ruwa, tana da kyau a ci gaba-gaban measurement.

Yadda a Ci Gaba-Gaban Abubuwan Tan Delta Testing

Akwai biyu na yadda a ci gaba-gaban kyakkyawan insulation system a cikin tan delta ko dissipation factor test.

Tafin, tana da kyau a ci gaba-gaban abubuwan tests masu zamani don ci gaba-gaban deterioration na kyakkyawan insulation saboda damar aging effect.

Na biyu, tana da kyau a ci gaba-gaban kyakkyawan insulation daga value na tanδ, maimakon. Ba a bukatar bayyana abubuwan tests masu zamani na tan delta test.

Idan insulation tana da kyau, factor na loss tana da kyau a kan duka range na jirgin ruwa. Amma idan insulation ba tana da kyau, value na tan delta tana da yawan adadin ruwa a kan range na jirgin ruwa mai yawa.

Daga graph, tana cikakken cewa tan na delta tana da yawan adadin ruwa a kan increasing test very low-frequency voltage. Yadda ake da yawan adadin ruwa na tan&delta, tana nufin, high resistive electric current component, a kan insulation. Wannan results tana da kyau a ci gaba-gaban abubuwan tests masu zamani na insulators, don ci gaba-gaban decision na musamman idan equipment tana da kyau a kawo.

Statement: Respect the original, good articles worth sharing, if there is infringement please contact delete.