| 摘要 |
PROBLEM TO BE SOLVED: To provide a protection device for an overload current capable of attaching a wide current detection range at a low cost. SOLUTION: This protection device for an overload current, which shuts down feeding to a load 3 such as a motor and the like from a power supply by a contactor (switch) 2 at overloading, uses an element 40 having a magnetic impedance effect as current detection means 4a, 4b, and 4c and magnetic saturation by an iron core, which causes problems in a conventional current transformer is eliminated, and the current detection range is increased. |
