Motor control and protection switch with overload thermal memory protection function
A protection function and protection switch technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of motor insulation damage, burnout, shortening the service life of the motor, etc., and achieve the effect of prolonging the service life and avoiding burnout
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[0011] Such as figure 1 As shown, the motor control and protection switch with overload thermal memory protection function of the present invention includes a motor 3, a three-phase switch 2, an overload thermal memory module 4, a first current transformer 1-1, and a second current transformer 1-2 And the third current transformer 1-3, the input terminals of the first current transformer 1-1, the second current transformer 1-2 and the third current transformer 1-3 are respectively connected to the three phase lines of the three-phase power supply , The output ends of the first current transformer 1-1, the second current transformer 1-2, and the third current transformer 1-3 are all connected to the three-phase terminals of the motor through switches, and the first current transformer 1-1 The control terminals of the second current transformer 1-2 and the third current transformer 1-3 are respectively connected to the corresponding input terminals of the overload thermal memory m...
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