Super thunder-prevention protection mobile jack

Abstract

The invention relates to a super lightning protection mobile socket which comprises a shell body, a circuit board, an overcurrent sensor, a zero sequence mutual inductor, a test button, a reset button, a control circuit, an electromagnetic tripping device, two static contact pieces and two moving contact pieces on the N pole and the L pole; the electromagnetic tripping device consists of a framework, a main trip coil, a short circuit trip coil, an iron core and a spring; one end of each of the two moving contact pieces is arranged on the circuit board; an insulated pothook is arranged on two moving contact pieces; the other end of each of the two moving contact pieces is provided with a moving contact; an offsetting spring is sleeved on the reset button; the bottom of the reset button is provided with a reset pothook configured corresponding to the insulated pothook; the reset pothook is connected with the iron core; one end of each of the two static contact pieces is provided with a static contact; the other end of each of the two static contact pieces is arranged on the circuit board; the N pole runs through the zero sequence mutual inductor, bends outwards and traverses the overcurrent sensor; simultaneously, the L pole runs through the zero sequence transformer and the overcurrent sensor; a winding of the zero sequence mutual inductor is accessed to the control circuit. The invention has rapid speed of cutting off the power supply, is immediately grounded for protection and has high sensitivity and good reliability.

Description

technical field [0001] The invention relates to a mobile socket, in particular to a lightning protection mobile socket. technical background [0002] With the development of science and technology, there are more and more mobile power sockets with lightning protection function. The lightning protection mobile socket will provide reliability guarantee for the protection of people's life and property. In the existing lightning protection mobile socket, three varistors are connected in parallel between the three wires of the neutral wire, the live wire and the ground wire; The lightning voltage of the resistance voltage is discharged, and the power supply voltage continues to supply power to the electrical appliances. However, the varistor has a disadvantage, that is, the withstand voltage value of the varistor will drop by tens of volts every time it is struck by lightning. If a varistor with a rated voltage of 470V / 3000A is struck three times in a row, its withstand voltage...

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Problems solved by technology

However, the varistor has a disadvantage, that is, the withstand voltage value of the varistor will drop by tens of volts every time it is struck by lightning. If a varistor with a rated voltage of 470V / 3000A is struck three times in a row, its withstand voltage The value will be close to the peak value of the power supply voltage, and it will be burned by the peak voltage; if there is a lightning that lasts for 1S and hits the wire connected to the varistor, it will burn the varistor, and then burn the electrical equipment

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