1 / 7

Open-Circuit Test

Open-Circuit Test. Determine core-loss – R fe , X M Energize the low-voltage side. Equivalent Circuit. Open-Circuit Test continued. Meter readings at rated low-side voltage V = V oc = applied voltage with output open I = I o = magnetization current = I 2 fe + I 2 M

shaine-hodges
Download Presentation

Open-Circuit Test

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Open-Circuit Test • Determine core-loss – Rfe , XM • Energize the low-voltage side ECE 441

  2. Equivalent Circuit ECE 441

  3. Open-Circuit Test continued • Meter readings at rated low-side voltage • V = Voc = applied voltage with output open • I = Io = magnetization current = I2fe + I2M • Poc = core loss = VocIfe >>> Rfe = Voc/Ife • XM,LS = Voc/IM ECE 441

  4. Short-Circuit Test • Determine equivalent resistance, equivalent leakage reactance, and equivalent impedance of the transformer windings • Energize the high-side via an autotransformer or VARIAC. ECE 441

  5. Short-Circuit Test continued Adjust the VARIAC until the high-side current is at the rated value. Measure Psc , Vsc , Isc . ECE 441

  6. Equivalent Circuit ECE 441

  7. Short-Circuit Test continued • Zeq,HS = Vsc/Isc • Psc = I2scReq,HS >>> Req,HS = Psc/I2sc • Zeq,HS = R2eq,HS + X2eq,HS • Xeq,HS = Z2eq,HS – R2eq,HS ECE 441

More Related