0213.500MRET1P

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Fuses

Fuses are commonly used devices in electrical systems, and provide a variety of important functions in the development of power grids. One of the frequently used fuses is a 0213.500MRET1P. This type of fuse combines two power units: an E-type current fuse and an R-type switch disconnector. The fuse operates on two different principles to both protect the circuit from overcurrent and provide on-off control of the circuit.

Application Field of 0213.500MRET1P

The 0213.500MRET1P is designed to be used in systems that generate and transmit energy. This includes power supply and distribution systems, as well as telecommunications networks. It is particularly useful in situations where a long life is required, as it offers reliable operation over multiple years of use. Furthermore, as it integrates two components into one device, it allows for a more compact design in control panel installations. This makes it ideal for applications where space is at a premium.

Working Principle

The E-type fuse utilizes a bimetallic strip, which produces a heat current when electricity is passed through it. This is initiated by the current sensing coils attached to the fuse. When the current level exceeds the specified limit, the heat generated by the bimetallic strip melts the fuse link, thus breaking the circuit and protecting the system from overcurrent. The R-type switch disconnector also works through current sensing coils, but uses a spring loaded plunger to separate the contact points and break the circuit. This allows the user to control the power supply when needed.

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