Fuse confuse me

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I believe a time delay fuse ytakes more than 10 or 12 seconds to open when the load is at 200%. They usually use these when there are motors in the circuit.
 
April 20, 2004 - Fusetron? Dual-Element Fuses provide branch circuit, short-circuit, and ground fault protection. When sized properly, they also provide overload protection. Time delay feature makes it possible to use fuse ampere ratings that are much smaller than those of non-time-delay fuses. When used in circuits subject to surge currents such as those caused by motors and transformers, fuses can be sized close to full-load amperage to give maximum overcurrent protection.

For more info:
www.bussmann.com
 
brian john said:
Take a trip on the WWW to the Bussman websit a WEALTH of free information.
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Thanks Brian, I am heading there. BTW, do you guys get kicked out of the forum, every once in a while and have to log back in? I am wondering if I need to mess with some sort of timing out option in my profile to reduce the frequecy of this. Thanks, e/m.
 
Energy-Miser said:
Thanks Brian, I am heading there. BTW, do you guys get kicked out of the forum, every once in a while and have to log back in? I am wondering if I need to mess with some sort of timing out option in my profile to reduce the frequecy of this. Thanks, e/m.
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When you sign in click the box that says to remember your info (password, etc). This way you are always on line if you are connected to the internet.

You may be losing your internet connection periodically....
 
Energy-Miser said:
Thanks Brian, I am heading there. BTW, do you guys get kicked out of the forum, every once in a while and have to log back in? I am wondering if I need to mess with some sort of timing out option in my profile to reduce the frequecy of this. Thanks, e/m.
Click to expand...

"Remember me" doesent seem to help when using Norton (desktop PCs), but it seems to work when using McAfee (laptop). Probably in the way I have the settings, but I can't figure out which one to change.
 
Please help me, what is the difference between time delay fuse and non time
delay fuse? Thank you
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Non-Time-Delay vs Time_delay delends largely upon it's time current curve.
Time delay Class L, usually holds at 500% for 4sec, Class RK-5 hold 500% for 5 sec & 200% for 100sec.
Article 430.52 is a great example of the difference between Time-Delay and Non-Time delay on sizing requirments. It all depends on the Inductive inrush of the load. Motors & Transformers are Inductive. Lighting is Resistive. So the choice again, depends on the load.
Renewable links are another example of a Non-Time-Delay fuse, which defined by the NFPA-79 are now illegle for Industrial Applications.
At: http://stevenengineering.com/Tech_Support/PDFs/06APPNOTES.pdf
Pages 3-8
It's kinda dry reading, bring a donut and a beer.
 
Come on David you have an advantage over us...You work at the source.

Though your management IMO does a great job keeping those that want to be informed, informed
 
brian john said:
Come on David you have an advantage over us...You work at the source.

Though your management IMO does a great job keeping those that want to be informed, informed
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thanks everyone for gave me all this good information about the fuses .(powerp)
 
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