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When traditional fuses are being used for overcurrent protection it can only protect once then it must be replaced. The PTC resettable fuse is a type of over current protection element which has two functions providing overcurrent protection and automatic reset.
The overcurrent protection PTC element is serially connected to the circuit and under normal circumstances it provides a low resistance state and can ensure the normal working of the circuit. If a short circuit or unusually high current occurs, the PTC fuses cut in to reduce the voltage down to a trickle thus preventing damage and protecting the equipment.
The PTC fuse will automatically reset once the fault in the over current is removed. The PTC elements will automatically return to its low resistance state, which not only avoids maintenance or replacement but also avoids a continuously circulating switching state which can cause circuit damage.
The new MULTI range of power supplies are rewriting the rule book for Multi-way CCTV Power.
The 2 new units, now do the job of 6 previous models without losing any of the current range benefits with their unique fuse layout making them the most cost effective, user friendly & flexible Power supply on the market. The clear panel in the front of each unit allows engineers to see if outputs are live without opening.