The working state of the relay mainly refers to the action state of the input signal to the coil. The design of the relay coil is a signal that has a long-term continuous action corresponding to different input signal states, and has a short-term repeated operation (pulse) signal. Continuous operation means that the coil can continuously withstand the long-term effects of the working signal. Pulse frequency, on-off ratio, etc. are also considered for the pulse signal. Thus, according to the signal characteristics suitable for the selection of different operating states of the relay, generally do not agree not use, particular attention to short relay operating state can not be used in a continuous operation state, under high temperature operating conditions particular attention. When actually switching power loads or high-power loads, it is especially important to consider that the switching rate is too high. It should generally be less than 10 ~ 20 times / min Maximum circulation rate: 0.1 times / (maximum release maximum pull time + time) S
In addition to the relay it fulfills the requirements of work under various environmental conditions and the steady state line, but also must take into account the dynamic behavior, i.e., pull time, release time, jitter due to the current fluctuations caused by contact and collision due to rebound and so on.
Relay means within the rated load operation in a predetermined number of times (lifetime), at a predetermined operating frequency, the size of the contact can be purely resistive load switching. Obviously, as the load increases, the life of the relay will be shortened, but there is no universal load life correspondence. Different relays have different load-life relationship curves, that is, the life curve.