How is the reliability of the relay affected?

Update:21-05-2021
1. The influence of the environment on the reliability of the relay: The average time between failures of the relay working in GB and SF is the highest, reaching 820000h, while in the NU environment, it is only 60000h.
2. The influence of quality level on the reliability of relays: When the relay of A1 quality level is selected, the average time between failures can reach 360,000h, while the average time between failures of the C level relay is 110,000, which is 33 times the difference between them, which shows the quality of the relay. The grade has a great influence on its reliability performance.
3. The influence of the contact form on the reliability of the relay: The contact form of the relay will also have an impact on its reliability. The reliability of single-throw relays is higher than that of double-throw relays with the same number of poles. Increased reliability gradually decreases. The mean time between failures of single-pole single-throw relays is 5.5 times that of four-pole double-throw relays.
4. The influence of structure type on the reliability of relay: There are 24 types of relay structure, and different types all have an impact on its reliability.
5. The influence of temperature on the reliability of the relay: The operating temperature range of the relay is between -25 and 70°C. As the temperature increases, the relay's mean time between failures gradually decreases.
6. The influence of the action rate on the reliability of the relay: With the increase of the action rate of the relay, the mean time between failures basically shows an exponential downward trend. Therefore, if the designed circuit requires a very high rate of action of the relay, it is necessary to carefully check the relay in order to replace it in time when the circuit is repaired.
7. The influence of current ratio on the reliability of the relay: The so-called current ratio is the ratio of the working load current of the relay to the rated load current. The current ratio has a great influence on the reliability of the relay, especially when the current ratio is greater than 0.1, the mean time between failures drops rapidly, and when the current ratio is less than 0.1, the mean time between failures is basically the same, so the rated current should be selected in the circuit design Larger loads can reduce the current ratio, which can ensure that the relay and even the entire circuit will not reduce the reliability due to the fluctuation of the operating current.
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