Overheating the work of the relay and the wiring method
3, solid-state relay (SSR) the working principle and characteristics of solid-state relay is a two terminals for the input side, the other two terminals for the output of the four-terminal device, the middle of the isolation device to achieve the input and output isolation. Solid state relays according to the type of load power can be divided into AC and DC type. According to the switch type can be divided into normally open and normally closed type. According to the isolation type can be divided into mixed type, transformer isolation type and photoelectric isolation type, with photoelectric isolation type is the most. The
2, thermal reed relay working principle and characteristics of thermal reed relay is a use of thermal magnetic materials to detect and control the temperature of the new thermal switch. It consists of temperature magnetic ring, constant magnetic ring, reed switch, thermal installation, plastic substrate and some other accessories. The thermal reed relay does not use the coil excitation, and the magnetic force generated by the constant magnetic ring drives the switch action. Whether the permanent magnetic ring can provide magnetic force to the reed switch is determined by the temperature control characteristics of the temperature magnetic ring.
1, the working principle and characteristics of electromagnetic relays Electromagnetic relays generally by the core, coil, armature, contact reed and other components. As long as the coil at both ends with a certain voltage, the coil will flow through a certain current, resulting in electromagnetic effects, the armature will be attracted by the role of electromagnetic force to overcome the return of the spring to pull the iron core, Moves the contact with the static contact (normally open contact). When the coil power, the electromagnetic force will disappear, the armature will be in the spring of the reaction force to return to its original position, so that the contact with the original static contact (normally closed contact) pull. So that pull, release, so as to achieve the circuit in the conduction, cut off the purpose. For the relay "normally open, normally closed" contacts, it can be distinguished: relay coil is not in power when the state of the static contact, known as the "normally open contact"; in the state of the static contact As "normally closed contact".
The working principle and characteristics of the relay is an electronic control device, it has a control system (also known as the input circuit) and the control system (also known as the output circuit), usually used in automatic control circuit, it is actually smaller Of the current to control the larger current of an "automatic switch". So in the circuit plays an automatic adjustment, security protection, conversion circuit and so on.
