What are the Factors Affecting Relay Reliability?

Mar. 18, 2020

As a Power Relay China Supplier, share with you the influencing factors of relay reliability.

Power Relay

Power Relay

1. The impact of environment on the reliability of relays: The average time between failures of relays working under GB and SF is the highest, reaching 820,000h, while in the NU environment, it is only 60,000h.

2. The impact of quality level on the reliability of relays: When A1 quality level relays are selected, the average fault interval time can reach 3660000h, while the C level relays are selected with an average fault interval time of 110,000, with a difference of 33 times, which shows the quality level of the relay. The impact on its reliable performance is very large

3. The impact of contact form on the reliability of the relay: The contact form of the relay will also affect its reliability. The reliability of single-throw relays is higher than that of double-throw relays with the same number of blades. Reliability gradually decreases, and the mean time between failures of a single-pole single-throw relay is 5.5 times that of a four-pole double-throw relay.

4. The influence of the structure type on the reliability of the relay: There are 24 types of relay structure, and different types have an impact on their reliability.

5. the impact of temperature on the reliability of the relay: the operating temperature range of the relay is between -25 ~ 70 ℃. As the temperature increases, the mean time between failures of the relay gradually decreases

6. the impact of the action rate on the reliability of the relay: with the increase of the action rate of the relay, the average time between failures has basically declined exponentially. Therefore, if the designed circuit requires the relay to operate at a very high rate, the relay needs to be carefully inspected during circuit maintenance in order to replace it in time.

7. the effect of current ratio on the reliability of the relay: the so-called current ratio is the ratio of the relay's working load current to the rated load current. The current ratio has a great impact on the reliability of the relay, especially when the current ratio is greater than 0.1, the average fault interval time decreases rapidly, and when the current ratio is less than 0.1, the average fault interval time is basically unchanged. Larger load to reduce the current ratio, this can ensure that the relay and the entire circuit will not reduce the reliability due to the fluctuation of the working current.

When the input quantity (such as voltage, current, temperature, etc.) reaches the specified value, the appliance that causes the controlled output circuit to be turned on or off. Can be divided into electrical quantity (such as Power Relay, etc.) relay and non-electrical quantity (such as temperature, pressure, speed, etc.) two major types of relays. It has the advantages of fast action, stable work, long service life and small size. Widely used in power protection, automation, motion, remote control, measurement and communication devices.

Our company also has NB901 Relay for sale, welcome to consult.


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