Part Selection For Simplifying Certification by High Tech Design Safety скачать в хорошем качестве

Part Selection For Simplifying Certification by High Tech Design Safety

Part Selection For Simplifying Certification with High Tech Design Safety and Steve Barcik Amstel Certification needs at http://hightechdesignsafety.com/ Part selection is critical in building a product that is going to be CE marked, UL listed and be used in most institutions across the globe. You really have to select the right parts. Now there are a lot of nuances to part selection and I am just going to hit a few of the highlights today and then over the next videos we will continue to build on the things you need to know to get your product certified and to market. Be sure to like and subscribe to know when the next videos are released. The first thing is to identify what type of circuit breaker you are going to pick. These are very important. You want to pick a UL rated branch protected circuit breaker for your main breaker. Other breakers within your device can be supplementary breakers. So for your primary over current protection in your equipment, specifically industrial equipment, you want to use a UL 489 breaker. This is a branch-protected circuit breaker. You are bringing power into the equipment and then you are distributing it around, so that you have additional branches and you need to protect that. If you have a very large piece of equipment, downstream of that then I would suggest continuing to use branch-protected devices, that UL listed 489 breaker. Supplemental breakers include UL 1077 breakers. These are pretty much at the end of a branch where you are only feeding one other device. Let’s only use those in that case. Now also for your main power inlet over current protection, that circuit breaker or fuse …You want to pick a large enough over current protective device to work with your facilities where you send your product. Now why parts selection is so important, just like I talked about that breaker, is that if you don’t select the right parts then we can’t get your product certified at the end, we will have a redesign period, you will have to reconfigure your equipment, you may have to go out into the field and reconfigure equipment that has already been sold….which is a problem. So if High Tech Design Safety can get with you during the design phase, we can help you with your part selection in the beginning and it will be very easy to make the necessary changes on paper. Once we start ordering parts, building parts…it becomes way more difficult. Another very critical point is that if you are building a piece of equipment and you have safety circuits and safety devices in there…to give an example…Let’s say an interlock to prevent somebody from opening a door and sticking their hand in there and then…pulling out a stub. This is a horrible idea and it unfortunately happens. That interlock is there for human safety to keep people from sticking their hand into the machine…that is a safety part and then everything else that goes to that interlock and is involved with that interlock has to be fail safe and safety rated. So a lot of the times you will see that it is much easier and cheaper to select a little reed switch, you know an $8 switch, and they may have high reliability and you might be able to get away with it in some cases but to get certified you need that safety rated switch and the safety rated relay to operate it. Now in other cases like using a pressure-sensing device to look for and to prevent an explosion or over pressure event, that device needs to be rated too. It needs to be a safety rated device…And you will do a risk assessment which will get you there and have you understand what rating of part that you need. This is another place where hiring a company like High Tech Design Safety can help you out. However, if you go out and buy a non-safety rated part and try to use it in a safety functional capacity, then we will have to help you go back and re-design the equipment. So let’s design that in up front. One other thing that is important for part selection is plastic materials that are used. If you are going to use plastic anywhere in a piece of industrial equipment then you will need to be sure that it is UL94 V-0 meaning that it won’t catch fire. We here at HTDS recommend that you don’t use plastic anywhere near or for electrical enclosures or near any ignition sources. If you do use plastic for enclosures and things like that, then we will have to do the impact testing. So hopefully you are seeing how part selection is a very big topic and how it can grow and grow. High Tech Design Safety. We can send you documents and help with your part selection during the design phase. Share this video with your team members to get everyone on the design team involved and on the lookout for how part selection impacts the overall certification goal.