Relay is a kind of electrical control equipment, which can realize the function of circuit division and closure, time delay, conversion, etc. It is widely used in various automation control systems. When using relays, we need to pay attention to the rated voltage of the relay to ensure its normal operation and safe use.
I. What is relay rated voltage?
The relay voltage rating refers to the maximum operating voltage that the relay can withstand under normal operating conditions. When a relay is operating, if the applied operating voltage exceeds the rated value, damage will occur to the relay. Therefore, when selecting and using a relay, its rated voltage must be taken into account.
II. How to determine the rated voltage of a relay?
1. Choose according to the application
Different occasions require the use of different types of relays, the rated operating voltage is also different. Generally speaking, the small signal relays used in low power applications have a rated operating range of 5V-24V; while the high power contactors used in high power applications need to have a higher tolerance, and their rated operating range can reach 220V-380V.
2. Selection according to the type of load
Load type is also one of the important factors in deciding which type, brand and model of relay to choose. If the load is inductive in nature, such as motors, light bulbs, etc., then in the relay disconnect will produce a reverse electromotive force, then you need to choose a relay with a high tolerance; if the load is purely resistive in nature, then you can choose a lower rated operating voltage relay.
III. Relationship between the rated voltage and service life of relays
There is a relationship between the rated operating voltage and the service life of a relay. Under normal use, if the rated operating range is exceeded, damage will occur to the relay, thus shortening its service life. In addition, in long-term use, due to the influence of ambient temperature, humidity and other factors, it may also lead to the aging phenomenon of the relay, which also needs to be replaced or repaired.
VI,How can I improve the voltage resistance of a relay?
In practice, several measures can be taken in order to improve the voltage resistance of relays.
1. Choose the right model and brand
According to the different application scenarios need to choose the right type and brand of relay. Generally speaking, under the same power, the performance of the products with good brand and higher price is more superior, QIANJi Relay is an industrial integrated relay manufacturer with dozens of types of relays such as power relays, pcb relays, solid state relays and so on. And the quality is excellent and the price advantage is big. Fully automated production plant. And through the superior quality and performance, especially prominent in the industry.
2. Increase insulation distance
In the design of relays, the insulation distance can be increased, thus improving their voltage resistance. For example, products with isolation slots at the bottom of the relay can be used.
3. Enhance heat dissipation
In high power applications, it is necessary to select relays with good heat dissipation performance to ensure their normal operation. In addition, heat dissipation can be improved by adding heat sinks and fans.
Summary.
Relay rated voltage is one of the important factors affecting its normal operation and service life. Therefore, when selecting and using relays, it is important to choose the right model and brand according to the actual needs, and pay attention to keep the environmental temperature, humidity and other factors on its influence. Only in this way can we ensure the stability and reliability of the relay. Recommended relay manufacturer brand - QIANJI relay, click more to learn.