 | Recent Questions & Answers |
| Zelio Logic - Programmable relays |
| By decker1 in Instrumentation |
I am having problems communication between my pc and the relay I think it is because I have a 64 bit operating system and the usb driver is for a 32 bit. I have tryed to find a driver that will work with no luck Also called schneider elect. but the guy I talked with said he didn't know anything abou ... more |
| Need a Precision Pulse Stretcher |
| By SSCpal in Electrical Engineering |
I need a circuit that will accept a pulse of width x (x being 1-10ms) and output a pulse of width nx, where n is a fixed whole number in the range 2-24. Ideas? |
| Harmonics Impacts and Remedy |
| By iftikhar in Electrical Engineering |
1. How harmonics develops in power generation and distribution system? 2. How we gauge them to measure them and measure main points? 3. What are their bad impacts on generation and distribution system? 4. How can we reduce or maximum eliminate from the system? |
| Solar Cell ( Photovoltaic Cell) |
| By P.Nithin Kumar in Mechanical Engineering |
What is the life capacity and cost of the Single Solar Cell? What are the elements present in Solar cell? How to manufacture the solar cell? |
| 48" Pipe to 72" Header |
| By santropez in Mechanical Engineering |
In one of the branches I have a 48" pipe is being connected 72" pipe. The 72" pipe is spiral and at the joint there is a seam. Is it allowed by ASME standard? If it allowed, what is the precedure? Thank you..... |
| Communication Signal Error |
| By ThankGod in Instrumentation |
In a closed loop control system, where we have a HART Pressure transmitter communicating with a PLC using OMNI as HMI. The pressure transmitter is reading - 70psig in the field and on the OMNI in the control room is showing say 26psig. Please, what could cause this? I have checked the transmitter ca ... more |
| Installation of Gate Valves |
| By rp.jawahar in Mechanical Engineering |
Why can't larger size gate valves be operated in any position, say 45/60/90/180 degrees? |
| Difference Between MCCB and MCP (MPCB) |
| By roykav in Electrical Engineering |
Sir, There is major difference in physical appearance of MCCB and MCP (motor circuit protector) breaker without thermal protection, in one spec. The requirement is MCCB, but there is no type 2 co-ordination chart with manufacturer for the starters up to 15kw. MS question is can we call MCP as MCCB? ... more |
| Knee Point Voltage |
| By roykav in Electrical Engineering |
Sir, How do I find out the knee point voltage of the ct's? Why it is required only for ref. and differential ct's? Please give me the formula for the calculation. What is the actual meaning of knee point voltage? Thank you |
| Material Property |
| By hiren prajapati in Mechanical Engineering |
What is the material property like density? Modulus of elasticity (physical properties) of mild steel EN 8 material? |
| Testing Room Heater Coil |
| By jaswalcipher in Electrical Engineering |
I was testing my room heater coil and I found that only first half of coil starting from live wire side will make the tester glow and not the other half while the heater was working. Why it is so? When I put the tester on outer steel case,the tester was glowing. While touching that steel case ther ...more |
| Industrial Washer Sanatizing Pump. |
| By Robotech in Manufacturing |
Hi Guys, Firstly, hope you are all having a great holiday. I am busy designing a industrial conveyor driven washer for one of our hotels to clean the used cutlery, dishes etc. I am having a tough time trying to find a pump or similar that will dose the right amount of sanatizing liquid into the wat ...more |
| Heat Balance Sheet |
| By Vishal Modi in Mechanical Engineering |
How do I calculate the heat balance sheet of steam turbine? |
| Cable Rating for 250KW DC Motor |
| By Anonymous Poster in Electrical Engineering |
We are going to commission DC motor of 150 KW capacity & details are given below, Drive Incoming: Incoming supply 415 v ac Drive outgoing: Armature Voltage 415 V dc Armature Current 330 Amps Field Voltage 110 v dc Field Current 7.3 Amps Motor RPM:1000 Please give the proper calculation ... more |
| Secondary Injection Test of Numerical Protection Relay |
| By yk in Electrical Engineering |
respected sir, Happy xmas to all secondary injection test of numerical relay with test kit(like omicron, maggar,etc) which test should be done and what is the fundamental of choosing phase angle between I1,I2,I3, and V1,V2,V3. How stability,pickup and other tests perform.please guide me or gi ... more |
| Circuit Protection Using Capacitor |
| By Jay_ in Electrical Engineering |
This link provides three ways of protecting an application against the mains voltage. http://www.vishay.com/docs/ |
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| Happy Holidays! |
| posted in The CR4 Admin Blog |
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| Usbport |
| By kramarat in General Discussion |
We are all sorry for your loss. Although we may never meet in person, to pretend we are not friends is a fallacy. If I had friends like the ones on CR4 in real life, I would only turn on the computer once a week to check email. Please know, that in this difficult time, you are not alone. |
| Software to Save a Jpg Image to an Exact Size in Bytes |
| By hydrogenhead in Software & Programming |
I have a firmware .bin file for a Nikon Coolpix L120 camera. I have found that the firmware file contains several jpg images for the user interface. My intention was to modify the start screen image by putting trollface on it and then placing the modified jpg file back into the firmware file and fla ...more |
| Not "PC" but Stuff It; Merry Christmas! |
| By Tobugrynbak in General Discussion |
Just thought I'd send out this Xmas cheer to all my CR4 Mates, Compatriots, Associates, Fellow Travellers, Frenemies, Antagonists, and the Boorish and Hostiles (tick one or more as appropriate). May your celebration of the day bring you happiness and a pleasant break from the grind that is our dail ...more |
| I Love My Wife But... |
| By tcmtech in General Discussion |
Okay this is another one of my just for fun threads this time its relating to the lovable but strange quirks that my and probably most everyone else's wife or girlfriend exhibits. Feel free to share any story of an quirk or experience that your significant other has or to just compare them for mora ... more |
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