Magnetic latching relay is really a new sort of relay developed in current years. It truly is also an automatic switch. Like other electromagnetic relays, it might switch on and off the circuit automatically. The difference is that the commonly closed or typically open state of magnetic latching relay absolutely is dependent upon the action of permanent magnet, along with the switching state of magnetic latching relay is triggered by a certain width of pulse electric signal. Get extra details about Jiasheng Electric
Magnetic latching relay is divided into single-phase and three-phase. As outlined by relevant info, the maximum speak to switching present of magnetic latching relay in the marketplace can attain 150A; the voltage of control coil is divided into dc9v, DC12V, etc. Common electrical life is 10000 occasions; mechanical life is 1000000 occasions; contact voltage drop is much less than 100mV. Thus, it has the traits of power saving, stable functionality, compact size, substantial bearing capacity and superior efficiency than general electromagnetic relay.
Magnetic latching relay is mainly used in IC card prepayment meter and centralized meter reading system. In current years, magnetic latching relay has been widely used in the composite switch of reactive power compensation device. In mixture with thyristor, it has come to be the primary switching device in reactive power compensation device to switch large present circuit. It might also be used in various household appliances and automatic control devices (including lighting control system).
Benefits of magnetic latching relay
1. It may work with single or double coils only by pulse excitation.
2. Smaller size, PCB type installation.
3. Low power consumption, strong load capacity.
4. Safe and trustworthy, lengthy life.
Structure of magnetic latching relay
The magnetic latching relay is divided into two layers, the upper layer would be the electromagnetic system, and also the reduce layer is definitely the contact system. The electromagnetic system adopts the flat direct acting magnetic circuit system, which incorporates magnet, coil, armature, iron core and mounting plate. The magnet is located in the center with the mounting plate, and coils are installed on each sides on the magnet. The U-shaped iron core is set above the coil, plus the armature is within the iron core to form an annular structure It may be controlled by magnetic field. Each ends with the mounting plate are positioned beside the U-shaped bottom with the iron core, in addition to a pure iron plate can also be installed to prevent the interference of external magnetic field.
Principle of magnetic latching relay
The open and closed state on the magnetic latching relay is usually held by the magnetic force generated by the permanent magnet. When the contacts of your relay will need to be opened or closed (i.e. when the load is connected or cut off), the relay can comprehensive the state transition of opening and closing in an instant by utilizing the positive (unfavorable) DC pulse voltage to excite the coil. The power loss is usually much less than 1W. Generally, when the get in touch with is in the hold state, the coil does not have to have to continue to be energized, as well as the state on the relay could be maintained only by the magnetic force of your permanent magnetic steel.
Function of magnetic latching relay
Relay is definitely an automatic switching element with isolation function, which is extensively utilised in remote control, telemetry, communication, automatic control, mechatronics and power electronic gear, and is one of the most important control elements.
Frequently, relays have induction mechanism (input element) which can reflect particular input variables (for example existing, voltage, power, impedance, frequency, temperature, stress, speed, light, etc.); there are actuators (output components) which can understand "on" and "off" control of controlled circuit; in between the input part and also the output component of the relay, there is certainly an intermediate mechanism (drive part) for coupling and isolating the input, function processing and driving the output part.
1. Expand the scope of control. For example, when the control signal of multi-contact relay reaches a specific worth, the multi-channel circuit may be changed, disconnected and connected in line with distinctive forms of contact groups.
2. Zoom in. For example, sensitive relay, intermediate relay and so on, using a pretty small amount of control, can control a higher power circuit.
3. Integrated signal. One example is, when multiple control signals are input into multi winding relay according to the prescribed type, the predetermined control effect is accomplished by way of comparison and synthesis.
4. Automatic, remote control and monitoring. One example is, the relay on the automatic device as well as other electrical appliances can kind a program control circuit to understand automatic operation.
Application precautions of magnetic retaining relay
1. The factory status of the magnetic retaining relay is generally speak to closed, but could change on account of elements for instance transportation or effect through relay installation.Hence, it's essential to take measures to reset the contacts before use.
2. In order for the relay to operate reliably, the voltage applied for the coil should attain the rated voltage and the pulse width have to be greater than three times the operating time.
3.Magnetic Relay coils are polar differentiated and coil polarity have to be specified when ordering.
4. The shape and installation size of magnetic retaining relay can not be changed commonly. Throughout choice, attention must be paid to regardless of whether the relay shape size meets the requirements.The peripheral accessories of the relay are customizable.For double-hard-connected products, one side in the lead-out conductive strip should be flexible; if both sides are rigid, the relay is prone to high strain after installation, which may well adjust the parameters of the relay.