High voltage direct current contactor is a key component in high voltage electrical equipment. This contactor can open and close a circuit to control the flow of direct current. High voltage current contactor is an electrical component, the function of the device is to control the circuit in the high voltage direct current system. The contactor can withstand high voltages and currents, and can quickly open and close circuits without human intervention. It can control the size and direction of the current in the circuit, so that the snake in the direct current circuit can work normally. High voltage DC contactors are usually used in DC transmission systems, power grid regulation, DC electric starting and other occasions. In these situations, the fast response and stability of the Takano retention contactor are very important. Only when the HVDC contactor and its related components work correctly can the normal operation of the entire electric system be guaranteed.