Breaker switching-on and switching-off coil protection type resettable fuse, manufacturing process and application of breaker switching-on and switching-off coil protection type resettable fuse

Abstract

The invention relates to a circuit breaker opening and closing coil protection type resettable fuse, a manufacturing process and application thereof, and belongs to the technical field of circuit breaker opening and closing coil protection. The fuse comprises a lead, a packaging shell and an internal base material, wherein the lead is a tinned copper wire, and the packaging material of the packaging shell is flame-retardant epoxy powder. The manufacturing process comprises the following steps: performing weighing, kneading, internally mixing, crushing, pulling, tabletting, irradiating, punching, forming, inserting and welding wires, drying, dipping, drying, encapsulating, curing, cutting tail pins, electrifying, marking, grading, selecting, mixing and packaging according to the appearance;the circuit breaker opening and closing coil protection type resettable fuse is applied in front of a circuit breaker opening and closing coil. The fuse provided by the invention ensures that the coil is not burnt down in normal operation, reduces the power failure frequency and area, stabilizes the opening and closing, and reduces the risk of override trip of a power grid.

Description

technical field [0001] The invention relates to a circuit breaker opening and closing coil protection type self-resetting fuse, a manufacturing process and its application, and belongs to the technical field of circuit breaker opening and closing coil protection. Background technique [0002] Among all the defect types of substations under the jurisdiction of the power supply bureau every year, there are hundreds of "control circuit disconnection" type faults, 1 / 2 of which are burnt out of the opening and closing coils, and it is estimated that the burned coils need to be replaced every year in addition to regular inspections. More than 80, the coil burnt not only requires manpower and material resources to replace, but also will cause a large-scale power outage, and the failure to switch on and off in time will cause the risk of the power grid. [0003] At present, there are no related products for coil protection at home and abroad, and the air switch cannot solve this kin...

AI Technical Summary

Problems solved by technology

[0002] Among all the defect types of substations under the jurisdiction of the power supply bureau every year, there are hundreds of "control circuit disconnection" type faults, 1 / 2 of which are burnt out of the opening and closing coils, and it is estimated that the burned coils need to be replaced every year in addition to regular inspections. More than 80, the coil burnt not only requires manpower and material resources to replace, but also will cause a large-scale power outage, and the failure to switch on and off in time will cause the risk of the power grid

[0003] At present, there are no related products for coil protection at home and abroad, and the air switch cannot solve this kind of fault. Although the fuse can protect the coil, it increases the possibility of power failure.

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