It opens the circuits once the current flow crosses its maximum limit.įixed Mounted Breakers or Non draw out circuit breaker is represented by the symbol given above. Circuit breaker is an automatically operated switch that protects the appliances from short circuit or heavy load current. These are all the symbols used for generic circuit breaker. When the fuse blow, the circuit activates and shows a light or any other indication. Such fuses have a builtin alarm circuit for displaying the status of the fuse. The symbolic representation fo fuse with alarm contact.
It has a striker pin that works as an indicator for showing the fuse condition. Such type of fuse is also known as striker fuse. Motors require huge current upon starting, a slow blow fuse can withstand this current without blowing. it will blow out after a short period of time when the current exceeds the maximum limit. On the contrary to fast blow fuse, the Slow blow fuse can tolerate high current for a short period of time. It is the most common type of fuse used in electrical equipment which are sensitive to high current. Fast blow fuse instantly blow when the current exceeds beyond its maximum limit. The symbolic representation of a fast blow fuses in any electrical circuit.
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