Estmado Marcelo Andrés Aburto, Gracias por su comentario. Comentarle que tenemos la mayoría de nuestros vídeos en español disponibles en nuestro canal de TH-cam. Puede acceder a ellos en nuestra playlist llamada "All videos in Spanish". Un cordial saludo, El equipo de OMICRON.
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
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.
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
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
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
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
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
Estmado Marcelo Andrés Aburto,
Gracias por su comentario.
Comentarle que tenemos la mayoría de nuestros vídeos en español disponibles en nuestro canal de TH-cam.
Puede acceder a ellos en nuestra playlist llamada "All videos in Spanish".
Un cordial saludo,
El equipo de OMICRON.
I like this video - excellent
Can u plz tell what are the permissible limits of loss angle (%) for 132kv transformer and bushing (ht) according to IEC standard?
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
Exelentes videos les agradezco,lesdeseo exitos Gracias a todos
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.
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
Excellent video ! I am definitely going to subscribe!
Thank you Omicron
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
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
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.
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
Thank you so much. It cleared all my doubts.
Excellent ....
Very nice video
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Al pie del video en el icono de Engranaje puedes seleccionar SUB TITULOS y seleccionar traduccion al ESPAÑOL
good job
its perfect vedio
Well, good, but not perfect. . . at about 1:14 the footage is slightly out of focus..
thank you
what is main difference between GST and GSTg mode
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