73 entries.
wrote on October 24, 2016
at
10:59 AM
Hi Sir,
For Earthing Grid installation, NFPA 780 requires minimum of 460mm burial below grade. If the top surface of the massive pile cap concrete, 1200mm thick, is 600mm below grade level, is the installation of lateral earth grid conductor directly above the pile cap concrete allowed?. What Standards can I refer to?
Regards and hope to hear from you on my query.
Armando
For Earthing Grid installation, NFPA 780 requires minimum of 460mm burial below grade. If the top surface of the massive pile cap concrete, 1200mm thick, is 600mm below grade level, is the installation of lateral earth grid conductor directly above the pile cap concrete allowed?. What Standards can I refer to?
Regards and hope to hear from you on my query.
Armando
Admin Reply by: Ver Pangonilo
It all depends on the location of your project. Local regulations / code of practices provide such information. At the end of the day, if you are not violating any statutory laws in your project locations, these details can be incorporated in your project specifications. Previous projects that I worked with was done in this manner as long as safety and physical damage to the installation/equipment are given utmost importance.
wrote on October 21, 2016
at
1:22 PM
Hi Sir,
How can I check the reliability of GFCI/ELCB with a leakage current set at 30mA without the use of the test button?
How can I check the reliability of GFCI/ELCB with a leakage current set at 30mA without the use of the test button?
Admin Reply by: Ver Pangonilo
Use a current injector for your purpose.
wrote on October 18, 2016
at
6:38 PM
hi sir ver
im your avid fan in terms of electrical world. by the way sir, until now di ko maintindihan kung paano ung bank ng transformer kapag 400V system.
im your avid fan in terms of electrical world. by the way sir, until now di ko maintindihan kung paano ung bank ng transformer kapag 400V system.
Admin Reply by: Ver Pangonilo
400V system is not different from 440V or 480V system. Connection is still the same.
wrote on October 12, 2016
at
4:21 AM
Dear Ver
i'm trying to apply MVA method to a very simple circuit located in the following url:
http://electrical-window.blogspot.ae/2014/01/voltage-drop-calculation-with-mva-method.html
can you plz check if his way is correct since he uses mtor MVA same as the MVA for short circuit which is different from using the rated MVA as you have indicated in your article. in etap i tried to follow you method but i cant get it, etap gives 94%. please help. thank you
i'm trying to apply MVA method to a very simple circuit located in the following url:
http://electrical-window.blogspot.ae/2014/01/voltage-drop-calculation-with-mva-method.html
can you plz check if his way is correct since he uses mtor MVA same as the MVA for short circuit which is different from using the rated MVA as you have indicated in your article. in etap i tried to follow you method but i cant get it, etap gives 94%. please help. thank you
Admin Reply by: Ver Pangonilo
For a motor with rating already in MVA with per unit reactance known, the calculation provided in said website is correct.
In the calculation I have provided in my example, the motors are lumped.
In the calculation I have provided in my example, the motors are lumped.
wrote on October 6, 2016
at
7:09 PM
Good morning Sir,
I want just to know, how we protect personel from indirect contact in a TNS system if the main circuit breaker in a distribution panel is a 03 pole circuit breaker?
I want just to know, how we protect personel from indirect contact in a TNS system if the main circuit breaker in a distribution panel is a 03 pole circuit breaker?
wrote on August 2, 2016
at
4:57 PM
Hi Sir,
Is there any Philippine standard as to what should be the rating of electrical plugs on devices?
Is there any Philippine standard as to what should be the rating of electrical plugs on devices?
Admin Reply by: Ver Pangonilo
Check this:
PNS 1572 - Plug and socket-outlets for domestic and similar general use. This is the same version as the IEC 83:1975 (http://www.elibrary.dti.gov.ph//DocumentFolder/pages%20from%201572%201997%20plugs%20&%20socket__00001.pdf)
PNS 1572 - Plug and socket-outlets for domestic and similar general use. This is the same version as the IEC 83:1975 (http://www.elibrary.dti.gov.ph//DocumentFolder/pages%20from%201572%201997%20plugs%20&%20socket__00001.pdf)
wrote on July 26, 2016
at
4:19 AM
Please Sir VER Pangonilo, I have 30,000 Watt Transformer with 220 VAC 3 Phase input to 220 VAC 3 phase output Isolation transformer, I not understand how to size the breaker so it will not occassionaly trip on power fail/restore some times when the power restores the breakertrips, currently it's a 250 amp breaker. - Thanks
Admin Reply by: Ver Pangonilo
A 30,000 watt 3-phase transformer assuming that it is at unity power factor has a full load primary current of 78.7 A or about 98.4 A at 80% PF. If your 250 A breaker is tripping, that is already 5 times the full load current of your transformer. You can do the following:
1) Check your loads when the breaker is tripping. Are you starting a motor load? Or any load that has a high in-rush current?
2). Check the trip setting of your circuit breaker.
3) Hire a competent electrician to do the work for you.
Replacing the circuit breaker with a higher rating is not an option unless there is an audit on your electrical system to determine that cable sizes are suitable for the new size of your circuit breaker.
If you can add more information, I may be able to help you better
1) Check your loads when the breaker is tripping. Are you starting a motor load? Or any load that has a high in-rush current?
2). Check the trip setting of your circuit breaker.
3) Hire a competent electrician to do the work for you.
Replacing the circuit breaker with a higher rating is not an option unless there is an audit on your electrical system to determine that cable sizes are suitable for the new size of your circuit breaker.
If you can add more information, I may be able to help you better
wrote on April 9, 2016
at
4:59 PM
Good day sir,
Familiar po ba kayo sa ANZSCO skill levels in australia and New zealand? since you are registered professional engineer in australia. ano po ba ang mga qualifications? Thanks and God Bless
Familiar po ba kayo sa ANZSCO skill levels in australia and New zealand? since you are registered professional engineer in australia. ano po ba ang mga qualifications? Thanks and God Bless
Admin Reply by: Ver Pangonilo
Sorry, I am not familiar with ANZCO. My qualifications was assessed through Engineers Australia (https://www.engineersaustralia.org.au/). Check their website for details.
wrote on April 9, 2016
at
9:43 AM
Good day sir,
pamilyar po ba kayo sa ANZSCO-Skill levels dyan sa Australia?. Thanks po and God Bless
pamilyar po ba kayo sa ANZSCO-Skill levels dyan sa Australia?. Thanks po and God Bless
wrote on April 5, 2016
at
11:36 AM
Good day sir,isa po akung Assistant Electrician sa cruise ship.gusto ko rin po maging Master Electrician.may suggest po ba kayo na review center o PEC 2009 na nka pdf?thank you sir.
Admin Reply by: Ver Pangonilo
Hi Noel,
Matagal na akong wala sa Pinas, di ko na alam ang kalakalan sa mga review centers.
Meantime, try this [https://filipinoengineer.com/wiki/Main_Page] . Keep in touch, I may be able to help one way or another.
Matagal na akong wala sa Pinas, di ko na alam ang kalakalan sa mga review centers.
Meantime, try this [https://filipinoengineer.com/wiki/Main_Page] . Keep in touch, I may be able to help one way or another.
wrote on March 14, 2016
at
3:06 PM
As per IEC 60445 clause can I use only black color code cable for three phase system.
Kindly suggest.
Kindly suggest.
Admin Reply by: Ver Pangonilo
Please clarify if you are referring to the outer sheath or conductor color?
Thanks
Thanks
wrote on December 10, 2015
at
9:48 AM
Welcome to my guestbook. Feel free to leave a message and I will reply as soon as I can. Thank you!
wrote on December 9, 2015
at
12:38 PM
Hi Sir,
Apologies for posting under the comments as I found that your contact page is not showing your contact form.
Magandang umaga po! Please allow me to introduce myself, I’m Elvis Abilay. I am a mechanical engineer by profession working as a senior mechanical engineer in an upstream oil and gas company in Singapore. I am also the founder of Filipinooilandgas.com.
Filipinooilandgas.com is developed to be an online, multi-discipline
community and resource hub for Filipinos working in the oil and gas
industry. The site offers technical/non-technical articles and essential resources that aim to assist its audience to be more globally competitive. It is designed to connect with all Pinoys around the world, and to help, unite and promote the workforce which we are a part of.
We are aware how helpful and how early you have started on your website. Ours are not even a year old but our aim is to leave this legacy of building camaraderie and being an instrument to connect every Filipino on this industry online. It may sound to be so daunting but at the same time fulfilling.
I am writing to you with the hopes of having a chance to get your support on this endeavour. It will mean a lot to us should you be interested in providing guest article on the site on topics about Electrical or be interviewed on our upcoming educational podcast. I am sure our audience will find your message very helpful. We will make sure you get all the credit on all your messages and link to your site and promote it.
Thank you for your time reading this message. Have a wonderful day ahead and GOD bless.
Regards,
Elvis Abilay
Apologies for posting under the comments as I found that your contact page is not showing your contact form.
Magandang umaga po! Please allow me to introduce myself, I’m Elvis Abilay. I am a mechanical engineer by profession working as a senior mechanical engineer in an upstream oil and gas company in Singapore. I am also the founder of Filipinooilandgas.com.
Filipinooilandgas.com is developed to be an online, multi-discipline
community and resource hub for Filipinos working in the oil and gas
industry. The site offers technical/non-technical articles and essential resources that aim to assist its audience to be more globally competitive. It is designed to connect with all Pinoys around the world, and to help, unite and promote the workforce which we are a part of.
We are aware how helpful and how early you have started on your website. Ours are not even a year old but our aim is to leave this legacy of building camaraderie and being an instrument to connect every Filipino on this industry online. It may sound to be so daunting but at the same time fulfilling.
I am writing to you with the hopes of having a chance to get your support on this endeavour. It will mean a lot to us should you be interested in providing guest article on the site on topics about Electrical or be interviewed on our upcoming educational podcast. I am sure our audience will find your message very helpful. We will make sure you get all the credit on all your messages and link to your site and promote it.
Thank you for your time reading this message. Have a wonderful day ahead and GOD bless.
Regards,
Elvis Abilay
Admin Reply by: Ver Pangonilo
Hi Elvis,
By all means, you have my support. Just let me know.
Thanks
Regards,
Ver
By all means, you have my support. Just let me know.
Thanks
Regards,
Ver