Large-current electromagnetic relay

Abstract

The invention discloses a large-current electromagnetic relay. According to the large-current electromagnetic relay, a sampling assembly is fixedly inserted into steps at two sides of an energy-saving type large-current electromagnetic relay, an electronic sensor circuit board is installed on one lateral inner wall of the sampling assembly, two temperature sampling connection rings connected with two copper binding posts respectively and a current sampling magnetism-conductive ring are arranged on the circuit board, a temperature control circuit, a current control circuit, an alarm circuit and a disconnection execution circuit are arranged on the circuit board, a power supply positive pole connector N, a power supply negative pole connector E, a relay coil positive pole connector M and a signal amplification output connector K are installed on a plug at the outer side of the assembly in sequence, and the plug is provided with a connector socket with a lead led out from the lower portion. After being additionally provided with an overload and overheating sensor based on the prior art, the large-current electromagnetic relay has the advantages of being high in voltage resisting grade, small in size, low in energy consumption and long in service life, is safer to use, and can timely give an alarm and cut off an external overload power supply circuit.

Description

[0001] Technical field: [0002] The invention is an electromagnetic relay which is especially suitable for installation and use on motor vehicles and can prevent unsafe factors such as short circuit and overheating caused by current overload. Background technique: [0003] The existing "energy-saving high-current electromagnetic relay" patent number is 200910065110.5, which is fixed on the upper step of a casing made of engineering plastics in parallel with two wiring copper posts, and a pressure clamp is screwed on the copper posts respectively. Tighten the nuts, each nut is provided with protective caps, and there is a partition wall between the protective caps. A cylindrical yoke with a concave bottom surface of the inner coil is provided under the steps in the shell. The iron cylinder is equipped with a push frame on the center of the cylindrical yoke. The adjustment rod under the push frame passes through the center of the cylindrical yoke and the return spring ins...

AI Technical Summary

Problems solved by technology

Although it has the advantages of high insulation withstand voltage level, small size, light weight, low energy consumption, and long life, there are certain unsafe factors because it has no overheating, overload alarm and short-circuit cut-off functions.

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