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Most overload faults are isolated through a circuit breaker operating on a inductive trigger. Inductors take time to build up their magnetic field related to the total circuit resistance. The lower the overall circuit resistance and higher Henry value of the inductor, the longer it will take the magnetic field to develop. Electric motors and compressors for instance pull a very heavy load at startup. You need a time delay fuse as a normal fuse would blow every time the motor or compressor started.
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What is the function of the time delay Fuse?
The time delay fuse allows a momentary overload due to startup current.
What is the difference between a fuse and a time delay fuse?
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.
Why is there a delay in restarting a compressor that has kicked off due to an overload?
Sequencer is out of sequence
Why is there a delay in a compressor that has kicked off due to an internal overload?
Sequencer is out of sequence
Why is there a delay in restarting a compressor that has kicked off due to an internal overload?
Sequencer is out of sequence
What are two methods used in most circuit breakers to protect electrical circuits?
There is a heated bimetallic strip that provides a time delay small overload protection. When its contact makes, it energizes a coil to trip the breaker. Some breakers are mechanical, though. There is a coil that trips the breaker instantly on large overload.
Why is there a delay in re-starting a compressor that has kicked off an internal overload?
an internal overload is based off of heat.High heat=overload opens.Heat has to dissapate and motor cool to safe temp before internal contacts will close.
What is the definition of current trip overload or overloaad trip?
i think the meaning of that is a various types of time delay are used for overload trips to ensure that the generator breaks will not open due to a momentary current surge, but only if the excess current persist.....thats all.... :)
What is the use of the rheostat in a star and delta starter?
There is a small potentiometer fitted to the delta timer. This is the time delay between the start button being pressed and the changeover to delta operation. If the starter trips on overload when changeover occurs you need to increase the time delay See related links
What is the inverse time of the thermal overload?
what is the inverse time of the theraml overload?
How a fuse can provide time delayed protection for normal overload and high speed protection for short circuit?
There are two sections of the fuse; a straight wire section that provides quick acting response to short circuit conditions, and a coiled spring section with a soldered lump with thermal mass that provides time delay for normal overload. When inspecting a blown fuse, you can tell if it was a short or an overload by looking at where the blowout occurred.
A device that protects a circuit from current overload is called?
Fuses or circuit breakers are termed 'overcurrent protection devices', which protect circuits from either an overload current or a short-circuit current.
