Notes on the use of relays

Notes on the use of relays

 1. Rated operating voltage: This is the voltage required by the coil for the relay to operate normally. Depending on the type of relay, it can be either AC voltage or DC voltage.

2. DC resistance: This is the DC resistance of the coil in the relay and can be measured by a multimeter.

3. Suction current: This is the minimum current at which a relay can produce a suction action. In normal use, the given current must be slightly greater than the suction current so that the relay can work stably. For the working voltage added to the coil, generally do not exceed 1.5 times the rated working voltage, otherwise a large current will be generated and the coil will be burned.

4. Release current: This is the maximum current that can be used to produce the release action of a relay. When the current of the relay is reduced to a certain level, the relay will return to the unenergised release state. The current at this point is much less than the suction current.

5. Contact switching voltage and current: This refers to the voltage and current that the relay is allowed to load. It determines the size of the voltage and current that the relay can control and cannot exceed this value when in use, otherwise it is easy to damage the contacts of the relay. With technology; refers to the fact that the coil in the relay will produce a very high inversion electromotive force if it loses current, which can easily damage the electronics controlling it. It is important to focus on the introduction of absorption circuits in the design of the circuit during use.

继电器的使用注意事项

 1. 额定工作电压：是指继电器正常工作时线圈所需要的电压。根据继电器的型号不同，可以是交流电压，也可以是直流电压。

2. 直流电阻：是指继电器中线圈的直流电阻，可以通过multimeter测量。

3. 吸合电流：是指继电器能够产生吸合动作的最小电流。在正常使用时，给定的电流必须略大于吸合电流，这样继电器才能稳定地工作。而对于线圈所加的工作电压，一般不要超过额定工作电压的1.5倍，否则会产生较大的电流而把线圈烧毁。

4. 释放电流：是指继电器产生释放动作的极限电流。当继电器吸合状态的电流减小到一定程度时，继电器就会恢复到未通电的释放状态。这时的电流远远小于吸合电流。

5. 触点切换电压和电流：是指继电器允许加载的电压和电流。它决定了继电器能控制电压和电流的大小，使用时不能超过此值，否则很容易损坏继电器的触点。用技术；指继电器中线圈在失去电流的情况下会产生一个非常高的反相电动势，很容易损坏控制它的电子器件，在使用过程中务必重点考虑在设计电路中引入吸收电路。