Recent content by Jetach

Well, our device in development will be used on patients, and anything coming within 6 feet radius of a patient needs to have UL 60601-1. I believe that UL544 was withdrawn sometime in 2009 and replaced with UL 60601-1. The testing for this is much more stiffer, which is ultimately what gave me...

So far I've only found one UPS that fits my needs which would be a Tripp Lite http://www.tripplite.com/en/products/model.cfm?txtSeriesID=748&txtModelID=5440 with a battery it can run 1920 Watts for 40 minutes. It appears this is the only option available, I called up APC and their...

Hello PF, After doing much research, I've decided that buying a retail UPS would be a much better idea than building one from scratch even though the cost is higher. I need to output 2kW for roughly 30 minutes. I am looking for a 3000 VA UPS that meets medical grade requirements. I...

Yes, I have just finished my third year in a 5-year program for ECE, so I am somewhat inexperienced. However, I was still wondering if there were efficient ways to accomplish this. I've researched a bit more and in terms of cost-effective, I've found that taking apart an old ups and...

It is medical equipment, and I will ask the head engineers about which agency it will be under. Can I ask what the acronym UL stands for?

Thanks for that link it is very helpful. Quick question, what are the pros and cons of a deep cycle battery for a UPS? From what I am able to gather, it is able to provide longer durations of power, however the overall life of the battery is shortened due to the depth of discharge.

There will be multiple loads connected to various PCB boards and motors to keep the device functional. It is a device in development so I do not want to give too much information, but I want to have a safe, cost-effective, and efficient UPS able to deliver about 2kW. I've been leaning towards...

Thanks for the responses. I've found that Lead-Acid batteries are the cheapest, and modding out an old UPS with car batteries appear to be the cheapest and easiest way. However, after some more research, I've found that lithium ion batteries are much smaller and efficient, although the cost is...

Hello, I am wanting to build an uninterrupted power supply for a certain device that has multiple electronic devices working together. It will need to run about 1.5k Watts for about 15-30 minutes without an external power source. There will be a few moving parts such as wheels to move...