TanDelta/Power Factor Testing - Background

OMICRON Educational Video: In this video you will learn about means to measure the quality of the insulation of power transformers and bushings, such as power factor or dissipation factor measurement, and measuring capacitance. Possible causes for a reduction in insulation quality are also explained.
Interested in power transformer testing? - Watch all of our videos: • Power Transformer Testing
Get more Information on our website: www.omicronene...

[@omicronenergy]

Estmado Marcelo Andrés Aburto, Gracias por su comentario. Comentarle que tenemos la mayoría de nuestros vídeos en español disponibles en nuestro canal de KZbin. Puede acceder a ellos en nuestra playlist llamada "All videos in Spanish". Un cordial saludo, El equipo de OMICRON.

[@chabchoubmohamed320]

I like this video - excellent

[@joserivera956]

Exelentes videos les agradezco,lesdeseo exitos Gracias a todos

[@eng.omareyadaljorani9954]

Dear Sir: Could you please tell me, For power transformer, which test is more accurate? And why? TAN DELTA TEST OR INSULATION RESISTANCE TEST? With my best regards.

[@omicronenergy]

Hi Eng. Omar Eyad Aljorani, thanks a lot for watching our videos and for your interest. Regarding your question: Tangent Delta Testing allows an assessment under AC test voltage which is comparable to at power frequency and provides more detailed information about the insulation integrity. Best regards, your OMICRON team

[@udeyraj1988]

Excellent video ! I am definitely going to subscribe!

[@ahmetc34]

Thank you Omicron

[@jayarajum]

Excellent ....

[@habibulhuda6447]

Can u plz tell what are the permissible limits of loss angle (%) for 132kv transformer and bushing (ht) according to IEC standard?

[@omicronenergy]

Dear Habibul Huda, thanks a lot for your interest in our videos and products. Regarding your question: In the IEC60137:2003-8 the maximum values of tan(delta) are give in Table 5 as: OIP: 0.7% RIP: 0.7% RBP: 1.5% For power transformers there are no limits given in a IEC standard. For limits it typically to follow CIGRE recommendations. In the CIGRE 445 it is mentioned that values are typically around 0.5% and values above 1% are questionable. Best Regards, your OMICRON team

[@eng.omareyadaljorani9954]

What is the permissible limits of Capacitance in (pf or nf) between HV - LVE, LV-HVE, HV-LV for power transformer : 11.5Kv, 33kv, 132kv, 400kv Best regards

[@omicronenergy]

Hi Eng. Omar Eyad Aljornai, thanks for your question. Here refence values could be checked based on FAT results for comparison. If you have any additional questions, please get in touch with your local contact person. You can find them here: www.omicronenergy.com/en/contact/addresses Best regards, your OMICRON team

[@moumitamondal5188]

Am I saying it correct? Ust means cap measured between HV and LV bushing of transformer. Gst means means HV and ground or LV and ground.

[@omicronenergy]

Dear Moumita Mondal, thank you for your interest! UST guards the current to ground whereas GST always measures the current to ground. Depending on the input configuration and setup, yes UST-A or UST-B is the Cap between HV and LV and GST the CAP between HV+LV+Ground. If you have any additional questions, please get in touch with your local contact person. You can find them here: www.omicronenergy.com/en/contact/addresses Best Regards, your OMICRON team

[@moumitamondal5188]

Thank you so much. It cleared all my doubts.

[@marceloandresaburto1527]

Se puede acceder a los 55 vídeos en español?

[@williamrodriguez7446]

Al pie del video en el icono de Engranaje puedes seleccionar SUB TITULOS y seleccionar traduccion al ESPAÑOL

[@jitendradubey3682]

Very nice video

[@Doodee2523]

good job

[@whorton4]

Well, good, but not perfect. . . at about 1:14 the footage is slightly out of focus..

[@mohammedalhilly9583]

its perfect vedio

[@unionhunter96]

thank you

[@amnrl]

what is main difference between GST and GSTg mode

[@omicronenergy]

Dear Mr. Chand, In GST mode each current from HV to ground, HV to Input A (red) and to Input B (blue). GSTg A or GSTg B or GSTg A+B means that the stated input of the CP TD1 gest guarded ("g" means guard) therefore this input current will not be taken into account for the calculation. For more detailed information please contact the support of OMICRON via our website. Best regards, Your OMICRON team