![]() ![]() It's late here and I'm not typing this on my programming computer or I would add it now. If this interests you at all I can cut and paste the UDT structure here tomorrow. Ie a tag named Clock of the type DateTime. I created a user defined datatype called DateTime and used it inside of the UDT for the Clock tag. GSV(WALLCLOCKTIME, ,DateTime, Clock.Year) Date, Time, etc This would be used to trigger the time that the totalizer resets (time of day) If you put it in the AO! you might want to add You can use a totalizer outside of the AOI or incorporate it in the AOI. So you can vary the period of the periodic task to get the resolution that you want. If t = 60s then kWm (kilowatt-minutes), etc. KWh := kW x t // calculate kw(t) where t is the number of seconds of the period. T := Taskrate / 1000000 // Convert task rate in microseconds to seconds ![]() GSV(task, THIS, Taskrate) // Get the rate of the periodic task. I like structured text for things like this. Personally, I would make it an AOI so I could use it for individual users (motors, etc) or total power, variable load, etc. I would use a periodic task. If it's not constant (more likely) then it becomes more interesting. It makes people ask questions like the OP who can't tell the difference between kWh and kW.If power consumption is constant then it's easy. And all that does is confuse people who don't understand the math/physics. ![]() There's a unit of time on the numerator and a unit of time on the denominator, and they should cancel out, but since they are different units, they don't. You clearly understand the math, but your missing the point. no need to keep all the zeros.Īre you saying that we should measure distance in miles-hours per second? Because that's exactly what kWh is doing. I’ve never liked kWh as an energy measurement. Some users, like a hospital for example have double redundancy, so if one fails, you still have the second (OK, in reality triple redundancy, as there's always the diesel with at least the same power rating and sometimes a smaller secondary diesel for a minimum of power to provide emergency service at the OR or emergency room)īut resin insulated transformers aren't that overpowerable, as their heat distribution is worse than that of a metal vessel full of oil. He was one of the men who installed the temporary transformer) Old oil transformers can easily be overpowered to 120-150% of their projected power rating, as long as they have proper air circulation (my old teacher, who was a electrician before, told us the story of a company, that overpowered their transformer too much, they installed fans and air vents to get rid if the additional heat, until the transformer made plopp and took half the building with it. They have for sure some sort of fuse/security switch and are built with some overdimension or the ability to get overpowered to a certain degree, bit they're not planned in a way that every house can draw full power at the same time, my estimate would be around 70-80% if not less. Limit the use of engineering jokes.Ĭall for Engineers: Tell us about your job! (16 July 2020)Ģ020 List of engineers willing to be interviewedĢ019 List of engineers willing to be interviewed No low-effort one-liner comments, memes, or off-topic replies. Answers must contain an explanation using engineering logic, and assertions of fact must be supported by links to credible sources.īe substantive. Racism, sexism, or any other form of bigotry will not be tolerated.ĭon't answer if you aren't knowledgeable. All users are expected to behave with courtesy. Note that questions must still be specific to engineering and not a general opinion survey.īe respectful to other users. Mechanical, Electrical, Civil, Chemical, and Computer are reserved for technical questions only.ĭiscussion can be used for general questions that apply to multiple disciplines, including some workplace topics. Review the wiki prior to posting.Īvoid questions that can easily be answered by searching on the internet.Īvoid questions that have already be answered by a post in the FAQ section of the wiki. Most general career related questions should be placed in the Monday Career Megathread. Post titles must be a question about engineering and provide context - be specific. Call for Engineers: Tell us about your job! (2020) New to AskEngineers? Read our subreddit rules and FAQ page before posting! Topic Filters ![]()
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