Analysis of the working status of the relay
The working state of the relay mainly refers to the input signal to the role of the coil. The design of the relay coil corresponds to the status of different input signals, has a long-term continuous action signal, and has a short-term repeated operation (pulse) signal. Continuous work means that the coil can continuously withstand the long-term effects of the work signal. Pulse frequency, on-off ratio, etc. must also be considered for pulse signals. Therefore, according to the characteristics of the signal to select a relay suitable for different working conditions, generally do not agree to use casually, especially to pay attention to the relay can not be used in a short-term state of continuous operation, high temperature work conditions, in particular, pay attention. In the actual switching of power load or high power load, it is particularly considered that the switching rate is too high. Should generally be less than 10~20 times/min. The maximum circulation rate is: 0.1 times/(maximum pick-up time + maximum release time) s
In addition to the requirements for relays to operate under various steady-state line and ambient conditions, the relay must also take into account various dynamic characteristics, ie, pull-in time, release time, jitter due to current fluctuations, and contact collisions. Resulting jump back etc.
The rated load of the relay refers to the size of the purely resistive load that the contact can switch at a specified operating frequency within a specified number of operations (lifetime). Obviously, if the load is increased, the life of the relay will be shortened, but there is no universal load life relationship. Different relays have different load-life curve, that is, the life curve.
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