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variable speed drive
Asked by kdaboh, Yesterday 02:47 AM in Electrical Engineering
I had a problem with a variable speed drive this morning after a power outage.the drive failed to come on after the power was restored.i therefore...
Current tranformer ratio
Asked by BBE1891, Apr 14, 2017 02:31 PM in Electrical Engineering
Good day, Current transformer ratio is dependent on loops in primary and secondary winding. If I have a 100/5A transformer with one loop, (no loop...
Fault modling on ATP
Asked by noha eleiwa, Mar 24, 2017 01:15 AM in Electrical Engineering
After apply different types of fault on IEEE 14 bus system the wave form is not correct why?
Wireless phone charging technology and Voltage Detection Technology
Asked by ceopaulkim, Mar 8, 2017 03:39 PM in Electrical Engineering
Are there is similarities between voltage detection using a tic tracer and qi charging technology for smartphones? Is it comparable or are they...
Current flow in 3 phase circuit
Asked by mfburnette, Mar 6, 2017 01:01 PM in Electrical Engineering
I have a 208 volt three phase AC supply. We want to attach one 18 amp single phase load to A-B and another identical single phase load to B-C. There...
Headset with aux input circuit board
Asked by Wanntrepreneur, Feb 26, 2017 01:28 PM in Electrical Engineering
I bought an aviation headset from China that works great until you plug in an aux source such as music from an iPhone / iPod / iPad. The airplane...
Cctv two way conversation
Asked by Jawahar1972, Mar 4, 2017 05:53 PM in Electrical Engineering
Did any one tried two way communication in CCTV. When I tried myself, I am able to hear the mic clearly. But audio out from DVR or NVR is not clear....
Rotary switch question
Asked by frmig, Jan 14, 2017 10:30 AM in Electrical Engineering
This shouldn’t be that hard but I can’t figure it out. I have an old European combination woodworking machine with three separate and identical...
Bulding current limiter?
Asked by notthebrightest, Feb 21, 2017 02:26 AM in Electrical Engineering
I'll describe the issue I'm having, since maybe there is a commercial product I can buy that won't be mistaken as a bomb as I travel through air port...
Measurement Sample Data
Asked by raazi91, Feb 23, 2017 05:09 AM in Electrical Engineering
Hi, I am looking for some sample measurement data of devices like Volt, Current, Power and Energy meters. I want to obtain statistical information...
Please can anyone help me out with this project topic
Asked by aguero25, Feb 22, 2017 02:09 AM in Other Engineering
What are the effect of guinea corn husk ash on the mechanical and water absorption properties of epoxy matrix composite
Schedule 40
Asked by batal009, Oct 15, 2008 03:30 AM in Mechanical Engineering
What is schedule 40?
Do I need an IS enclosure if the electrical components are already IS
Asked by gfriske, Jan 17, 2017 11:38 AM in Electrical Engineering
I have electrical items that are UL rated for class 1, div 2 a-d. I need them in an area that is class 1, div 2 group c. Can I just use any Nema 4x...
Equipment grounding in Antarctica
Asked by micale24, Jan 10, 2017 04:07 AM in Electrical Engineering
I'm airfield systems tech at McMurdo Station, Antarctica. My issues is the grounding of the electronics that are located on a 200-300 meter thick...
Can we construct a light bulb that matches the sun's blackbody spectrum?
Asked by TShackel, Jan 5, 2017 05:32 PM in Electrical Engineering
Hi, I have a question for electrical engineering experts about light bulbs and producing one most like the solar blackbody spectrum. I understand...
Transmission line impedance matching and frequency changes
Asked by portablevoid, Dec 27, 2016 05:24 AM in Electrical Engineering
If we have a certain transmission line at f0 , it has a load at its end ZL=R+jX then we insert a quarter wave transformer at the first position of...
DImming
Asked by ddddd1234, Dec 16, 2016 06:53 AM in Electrical Engineering
I have a problem with dimming lights 1) house is 2 story and 1 family with basement 2) i Have a 100 amp panel[/SIZE] 3) I showed this problem to...
3 phase 3 wire 240v old system all 3 phases to ground
Asked by Joewat, Dec 8, 2016 09:26 AM in Electrical Engineering
I had to put a 5 jaw meter securely back on pole it's a 3phase 3 wire 240v no ground from transformer. So Pg&e shut of power I secured box and tested...
Is thwn rated at 600V both ac and dc?
Asked by Louisa 9999, Nov 27, 2016 12:43 PM in Electrical Engineering
Installing a solar system panels to power optimezers combined string out put is less than 500v dc Is thwn rated for dc?
Can a power tool designed for 220V 60hz be used on a 230V 50hz power source safely?
Asked by s3rialthriller, Nov 28, 2016 01:54 AM in Electrical Engineering
I would like to purchase a specific power tool (Groove cutter) not available in my country but would like to import it from a country were the power...


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