Short in circuit wiring or circuit overloaded.
Check it with an OHM meter for continuity.
we use a time delay fuse at furnace area where heaters are used ect,
The time delay fuse allows a momentary overload due to startup current.
There is no difference. Slo-Blo is just a trademarked name for a time delay fuse.
A time delay fuse will allow for a temporary spike in the current (up to 100 or 200% of the fuse rating), such as when starting a motor. A regular (non-time delay fuse) will not allow for any spike over the current rating of the fuse. If you have a motor that pulls 2 amps while running, but pulls 6 ampls while starting, then you will want to use either a 6 amp non time delay fuse, or a 2 amp time delay fuse. If you are talking about pyrotechnics, a time delay (properly called a slow burning) fuse will give you more time to run for cover.
A time delay fuse will not blow at the first sign of an overload. It will delay blowing just long enough to allow a motor to start or a compressor to startup.
The short answer: Yes. The Long Answer: In Layman's terms yes, but not necessarily. It depends on who you're talking to. If you are talking to anyone working on electrical things, they think of fuses for electrical circuits. Fuses for electrical circuits protect electronics (any device needing electricity) from an overload. Many devices need a lot more electricity to start up than to keep running. A time delay fuse will allow for a small spike in the current (start up) and not burn out. A regular fuse will not allow for any spike in the current and break. I have not yet heard anyone refer to a time delay fuse as a slow burn fuse, but it could be called that. A slow burn fuse has to do with pyrotechnics and chemical rockets. It is simply a fuse that burns slowly. I could also see the terms being used interchangeably in this case too.
Time delay fuse.
Yes, and you should use a time delay fuse.
No, use a standard fuse.
time delay
A standard fuse will blow in just milliseconds when excess current flow or a short is detected. A time delay fuse on the other hand may take 5-10 seconds to blow under the same conditions. You would want to use a time delay fuse in a device that uses lots of current at startup but then uses less after it is started. An electric motor or compressor is an example.