Electronic Survey Assistance Needed

hi

il will be performing an survey in our plant. I will be survey all the electronic equipment and checking whether it is protected adequatly against lightening,faults etc. need to check whether earthing is properly done.and whether surge arrestors are installed on sensitive equipment. also

earthing

I would like to know what is the cross sectional area required for copper mat used for earthing a normal residential building? i know it will depend on the fault current and soil resistivity. but can i get some ball park figures.?is their any standards for earthing usinng copper mat for residential,

Synchronous Condensers

This power plant is considering converting a generator to synchronous condenser operation. If anyone has experience with this, I would like to hear about it: challenges, cost, operational issues, maintenance issues, equipment changes, etc. There are 2 large generators (ST prime mover) on the order o

Air Mover Properties

I have an air mover. This is a unit that uses a small amount of air to drag in a larger amount of air. The problem I have is that the air is going down a small diameter tube. This tube gets momentarily blocked. This really plays with the principle of the airmover and it decides to blow air the oppos

PLC Function Block

Good morning.Thanks in advance for your support and help that I have had here from everyone.I'm working for a company that use more Siemens PLC (simatic v5.4+SP1) I'm there one year know. And sometimes when I have problem and I didn't have alarm on the screen, I truly don't know where to look. Just

Load Test in a already erected EOT crane

In our power plant a EOT Crane of Max. loading capacity of 375 Tonne was erected and commissioned. Now we want to do the load test to get the loading capacity how can we get ? the necessary arrangements and other possibile facilities are required for this?

Sanjay Rawat

Engineer

Generator Voltage Drop

Generator CAT3306 - 180kVA - 380V output...when running for hours. Suddenly output voltage drops to 300V, same rpm/Hz drops during 2minutes, then rpm quickly goes up and frequency passing 54 Hz and generator engine goes off. Same symptoms come up after restarting. What do you guys think...\r\nThx fo

No Load Loss Testing

How to check the no load loss of the Alternator?

We do measure the Input power of the Prime Mover coupled to the alternator, but the Losses of the Induction Motor are not considered, Secondly the PF of the Induction motor running at very less load is also unknown?

Screw Threads Length Tolerance

i wanna ask u one question about thread length tolerances. is ansi and uni is same standard ?? what is the uni standard of screw threads parts , and plastic parts. and what is the tolerance lenght of thread if actual value is 11.50 .

waiting ur early reply

thanks

Pickling of Duplex Stainless Steel

We picklie Duplex stainless steel with Nitric and HF. The solution is supplied to us as 26wt%HNO3 and 7wt%HF solution mixed in water.

We then further dilute the the above liquor 2 to 1 with water.

I am trying to calculate the pH and the chemical reactions but the combination of the