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What exactly is a magnetic latching relay?

Magnetic latching relay is actually a new style of relay developed in recent years. It really is also an automatic switch. Like other electromagnetic relays, it might switch on and off the circuit automatically. The difference is the fact that the typically closed or commonly open state of magnetic latching relay entirely depends upon the action of permanent magnet, plus the switching state of magnetic latching relay is triggered by a particular width of pulse electric signal. Get much more details about Latching Relays


Magnetic latching relay is divided into single-phase and three-phase. According to relevant information and facts, the maximum get in touch with switching present of magnetic latching relay available can reach 150A; the voltage of control coil is divided into dc9v, DC12V, etc. Basic electrical life is 10000 times; mechanical life is 1000000 instances; make contact with voltage drop is significantly less than 100mV. Therefore, it has the qualities of power saving, stable functionality, tiny size, substantial bearing capacity and superior functionality than basic electromagnetic relay.


Magnetic latching relay is mainly applied in IC card prepayment meter and centralized meter reading system. In current years, magnetic latching relay has been extensively used within the composite switch of reactive power compensation device. In mixture with thyristor, it has turn out to be the main switching device in reactive power compensation device to switch substantial current circuit. It could also be employed in several household appliances and automatic control devices (for example lighting control system).


Positive aspects of magnetic latching relay

1. It could work with single or double coils only by pulse excitation.


2. Compact size, PCB type installation.


3. Low power consumption, powerful load capacity.


4. Protected and reputable, extended life.


Structure of magnetic latching relay

The magnetic latching relay is divided into two layers, the upper layer is the electromagnetic system, plus the lower layer will be the contact system. The electromagnetic system adopts the flat direct acting magnetic circuit system, which involves magnet, coil, armature, iron core and mounting plate. The magnet is located within the center from the mounting plate, and coils are installed on both sides of the magnet. The U-shaped iron core is set above the coil, and also the armature is in the iron core to kind an annular structure It can be controlled by magnetic field. Each ends with the mounting plate are positioned beside the U-shaped bottom of the iron core, along with 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 in the magnetic latching relay is generally held by the magnetic force generated by the permanent magnet. When the contacts of the relay will need to be opened or closed (i.e. when the load is connected or cut off), the relay can total the state transition of opening and closing in an instant by using the good (unfavorable) DC pulse voltage to excite the coil. The power loss is normally much less than 1W. Ordinarily, when the get in touch with is inside the hold state, the coil will not need to have to continue to become energized, plus the state on the relay is usually 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, that is extensively employed in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and is one in the most significant control components.


Normally, relays have induction mechanism (input portion) which can reflect particular input variables (like existing, voltage, power, impedance, frequency, temperature, pressure, speed, light, and so on.); you can find actuators (output components) which can understand "on" and "off" control of controlled circuit; amongst the input aspect and also the output aspect on the relay, there's an intermediate mechanism (drive component) for coupling and isolating the input, function processing and driving the output part.


1. Expand the scope of control. By way of example, when the control signal of multi-contact relay reaches a certain value, the multi-channel circuit may be changed, disconnected and connected as outlined by different types of speak to groups.


2. Zoom in. For example, sensitive relay, intermediate relay and so on, having a pretty little volume of control, can control a high power circuit.


3. Integrated signal. One example is, when numerous control signals are input into multi winding relay in accordance with the prescribed form, the predetermined control effect is achieved by means of comparison and synthesis.


4. Automatic, remote control and monitoring. One example is, the relay around the automatic device and other electrical appliances can form a program control circuit to comprehend automatic operation.


Application precautions of magnetic retaining relay

1. The factory status of the magnetic retaining relay is usually make contact with closed, but may perhaps change resulting from variables which include transportation or influence throughout relay installation.Consequently, it truly is necessary to take measures to reset the contacts ahead of use.


2. In order for the relay to operate reliably, the voltage applied towards the coil ought to reach the rated voltage and also the pulse width should be more than three times the operating time.


3.Magnetic Relay coils are polar differentiated and coil polarity need to be specified when ordering.


4. The shape and installation size of magnetic retaining relay can not be changed frequently. For the duration of choice, interest really should be paid to no matter if the relay shape size meets the requirements.The peripheral accessories on the relay are customizable.For double-hard-connected products, one side from the lead-out conductive strip have to be flexible; if each sides are rigid, the relay is prone to higher anxiety right after installation, which could transform the parameters with the relay.

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