Earth Fault Tripping

Hello all. I'll be very grateful if you could answer my queries and clear my concepts in the process.

I work in an oil & gas plant as a Trainee Electrical engineer. The power source that we use is a Caterpillar's G3508 (SITA) 630KVA/505kW natural gas engine which runs at only 40-50% load,

Obama Space Plan Under Continuous Assault

At Companies Tied to NASA, Casualties of a Changing Mission, NY Times

"The administration wants to turn to commercial companies for taking future astronauts to orbit while taking a hiatus from any ambitious missions to send astronauts beyond low-Earth orbit. Yet Congress has not agreed to the scuttling of Constellation and added a clause in this year's federal budget that prohibited NASA from canceling the program or starting a new one without Congressional assent. The skirmishing continued in earnest this week. Staff members on the House Committee on Science and Technology are reviewing documents that NASA sent over Friday evening to comply with the committee's demand for information used in formulating the president's proposal. In addition, on Tuesday, 62 House members signed a letter sent to President Obama "to express concern" over the direction of NASA."

ATK gets reprieve in NASA funding, AP

"ATK Space Systems says it has been cleared for a scheduled ground test of a new rocket motor in September. ATK says it received notice from NASA that the company will receive $160 million to prepare for the rocket test despite doubts about the future of the space program. The situation could change after October, when a new federal budget year starts."

ATK: NASA releases funds: Ares rocket work may continue through at least September, McClatchy-Tribune

"NASA in the last month threatened to withhold funding and enforce a contract clause that could force ATK to put up $500 million in termination costs for Ares, which is part of the Constellation space project. ATK officials would not confirm it, but NASA projected the termination clause would cost more than 2,000 jobs at the Top of Utah company."

Does moon plan have a pulse?, Houston Chronicle

"And the full 60-member House Appropriations Committee will be deciding whether to adopt Senate-passed restrictions designed to block an administration effort to have Constellation contractors set aside funds to pay potential contract termination costs - a move that critics contend bleeds the program before Congress has taken action. The language is part of the must-pass wartime defense supplemental bill. The panels' deliberations follow a letter to Obama by 62 House Democrats and Republicans from 18 states on Wednesday that urged the president to work with lawmakers on a compromise on the Constellation program."

DP Transmitter

I am doing loop checking of dp transmitter. Where calibarted range is :0 to 100 mbar

and flow is minimum:3.1 metercube/hr max : 3.8 metercube/hr

but when i am neumarically calculating, something is going wrong

Flow= k(meter constant)x√ ΔP , our meter constant is 1, process

Motor

We always take consideration of motor's start up current for breaker size and cable per NEC. How about the start up power.

Below are two pictures one is riser and the other is start up current graph.

When I did this by software, software also shows the start up MW.

Motor is about 2 M

Rotation Reversal

my workers sometimes run into this problem on psc motors. they call me and it either corrects by restarting or replacing the motor. the problem is i can't explain to them what causes this problem or if anything can be done to prevent a reccurence. i am an industrial and commercial hvac service contr

Open Leaders

= Open Leadership =

- In her new book, Open Leadership, Charlene Li explains how social media is just one force that is requiring leaders to cede control in order to succeed -
This discomfort of not being in control is the reason why I wrote Open Leadership. It's my attempt

my problem with s7 300

hello every body!

i work with PLC s7 300, my broblem is : one project in 15 project i have, it can not can be open when working.

help me because other program easy to open only one can not open

Caturday rib licking | Bad Astronomy

Those of you who follow me on Twitter may remember that on Father’s Day, my wife and mom-in-law made us an incredible meal of beef ribs with homemade BBQ sauce, twice baked potatoes, grilled corn, homemade sangria, and homemade apple pie.

It was awesome.

And I have proof, of a sort. This being Caturday and all, and with me expanding it on this blog to include all animals as I see fit, here is a picture of our two dogs, affectionately and pseudonymously known as Canis Major and Minor, giving their opinion on the ribs:

Oh right, they can’t give their opinion because they’re too busy licking every last beef molecule off the pan. That’s all they got though. Leftover ribs are the domain of humans. Specifically, this human.

Picture credit: my brother-in-law Chris, who has lots more great pictures on his Flickr page.


Related posts:

- Decompressing on a rare day off
- Canis Minor shoots for the sky
- The price of freedom
- Dog tired


Can Upkeep Improve the Bottom Line?

Valve maintenance is critical to keeping production lines running. Predictive maintenance might be a good tool to reduce downtime and eliminate some needed maintenance. Smart valves and monitoring instruments linked to control rooms via high-speed digital networks can help monitor valve health. A re

Yes, We Scan

A recent airport incident highlights the controversy surrounding new high-resolution body scanners now being installed in many airport terminals. Although some see the new technology as the best way to intercept air terrorists, others see it as crossing the line in terms of personal privacy. Do you

how protections differ from each other????

what is the difference between simple earth fault, stand by earth fault, sensitive earth fault and restricted earth fault?? and how do overcurrent, short ckt and over load differ???

In any electrical fault condition whether earth fault, short ckt or over load, either current or voltage will inc

Load Measurement

Hello,

Do you have any info about load gauge (push pull type) which can measure the load fast as well as have data storing capability. If it has a USB port this can be easily connected to a computer to download the data or else something like wireless transmission.

I have made a sm