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.