Hi, I am preparing to buy a netbook computer [those smaller and simpler laptop computers] in the coming holiday season. My purpose is to take it travelling with me. However, when I am home, I want to hook it up to a LCD display that I have and the conventional keyboard and mouse so I can work...
The utilities in the world usually do not like co-generation systems of their customers to be parallelled to the utility own system. Many simply forbid it. However, when there is a problem and the customer paid to have a 'hot standby' source from the utility, they will allow a source transfer...
Hi,
I have been visiting India recently and found out to my surprise that they do not use copper in their substation grounding [they use steel cables and steel members]. A utility engineer is telling me that they are having ground potential differences that affect their SCADA equipment...
I use analog VCR to record TV programs nightly. One specific channel, ABC on Channel 7, screws up the CC1 when I play it back to watch. The other channels play back without any problems. If I watch the program live on ABC Channel 7, there is no problem either.
My question is more of...
There have been a lot of ink on warnings about parallelling power transformers at distribution voltages or at Power User substations. People usually are cautioned against it due to increased fault current and the possible circulating currents when the two transformers mismatch on voltage and...
A Steel mill added a heat treatment machine 3500KVA single phase to their total system of 15MVA. It is causing voltage unbalance affecting the motors on the rest of the system.
Are there systems that can accommodate large single phase loads and avoid the voltage unbalance problem ? Railways...
A utility engineer friend of mine is trying to gather arguments regarding the deployment of 3 conductor cables vs. single conductor cables in medium voltage distribution. It seems that the former is mostly used in Europe [and non-US markets] and the latter mostly in North America [and its...
A high-tech company is planning to build a manufacturing facility, when in full operation, will consume 220MW of electricity. The manufacturing process is very sophisticated involving precision control and manipulation equipment and high energy use at the same time. A black out would cause...
I have heard from a Japanese customer of mine that their utilities would run their distribution substations with two or more step-down transformers in parallell [put it another way, with the bus tie breakers normall closed]. He did not see any reason for concern, and yet could not name any...
This is a great site. However, it would be a lot more helpful for the readers and experts if the questioner identifies whether he/she is applying in the ANSI/60HZ world or IEC/50Hz world.
I have suggested to the webmaster to add a checkbox in the query form for this so that as a new question...
