Reliability of relay
Release Time：
2022-10-26 15:19
Source：
1. The impact of environment on the reliability of relays: the average failure interval time of relays working in GB and SF is the highest, reaching 820000h, while in NU environment, it is only 60000h.
2. The influence of quality grade on the reliability of relay: when A1 quality grade relay is selected, the average time between failures can reach 366000h, while the average time between failures of C grade relay is 110000, with a difference of 33 times. It can be seen that the quality grade of relay has a great influence on its reliability performance.
3. The impact of contact form on the reliability of relay: the contact form of relay also has an impact on its reliability. The reliability of single-throw relay is higher than that of double-throw relay with the same number of cuts, and the reliability gradually decreases with the increase of the number of cuts.
4. Influence of structure type on the reliability of relay: there are 24 types of relay structure, and different types have an impact on its reliability.
5. The influence of temperature on the reliability of relay: the working temperature range of relay is between -25 ~ 70℃. With the increase of temperature, the average time between failures of relay decreases gradually.
6. Influence of action rate on relay reliability: With the increase of relay action rate, the average time between failures basically shows an exponential downward trend. Therefore, if the circuit design requires a very high speed relay, then the relay needs to be carefully checked during circuit maintenance in order to timely replace it.
7. Influence of current ratio on the reliability of relay: the so-called current ratio is the ratio between the working load current and the rated load current of relay. The current ratio has a great impact on the reliability of relays. Especially, when the current ratio is greater than 0.1, the average time between failures decreases rapidly, while when the current ratio is less than 0.1, the average time between failures is basically unchanged. Therefore, in circuit design, loads with higher rated current should be selected to reduce the current ratio. In this way, the reliability of the relay and even the whole circuit will not be reduced due to the fluctuation of the working current. [9]
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