Power relay is a controllable appliance, whose function is to convert the control signal to control the power equipment in the circuit. This paper will introduce the parameters and common power relay model and its characteristics.
What parameters should be considered to determine the power relay type selection
1. Performance parameters
Power relay is a kind of electrical element used to control high power circuit, its performance parameters include rated voltage, rated current, rated power, contact resistance, insulation resistance, mechanical life, etc. Among them, the rated voltage and the rated current are the most basic performance parameters of the power relay, which are used to determine the applicable circuit voltage and current range. Rated power refers to the maximum power that the power relay can withstand, usually multiplied by the rated voltage and rated current. Contact resistance and insulation resistance are important indicators to measure the contact quality and insulation performance of power relay, and the mechanical life refers to the life of power relay under normal use conditions. In the selection, it is necessary to select the appropriate power relay according to the voltage, current and power requirements of the actual circuit, and pay attention to whether the performance parameters meet the requirements, so as to ensure the stability and reliability of the circuit. At the same time, it also needs to consider the power relay brand, price, after-sales service and other factors, and make the best choice after comprehensive consideration.
2. Electrical parameters
Power relay is an electrical control element and whose performance is mainly determined by electrical parameters. Among them, the most important parameters are the rated current and the rated voltage. Rated current is the maximum current that the relay can withstand, while the rated voltage is the maximum voltage that the relay can withstand. There are also contact resistance, insulation resistance, operation time and other parameters also need to be considered.
In the selection, it is necessary to determine the rated current and rated voltage of the relay according to the actual application scenario. At the same time, the relay reliability, life, environmental adaptability and other factors. For the application scenarios with high load and high frequency, the relay with large rated current and voltage needs to be selected to ensure its stability and reliability.
In recent years, with the development of intelligence and automation, the application range of power relay is more and more widely. At the same time, some new relays are also emerging, such as solid state relays, electronic relays, etc. These relays have higher reliability, longer life and better environmental adaptability, and have become the trend of future development.
3. Mechanical parameters
The mechanical parameters of the power relay refer to the performance indicators of the relay in the mechanical aspects, including contact resistance, mechanical life, contact pressure drop, etc. These parameters have an important influence on the service life and reliability of the relay. In the type selection, the appropriate mechanical parameters should be selected according to the actual requirements.
For example, for frequent switching occasions, relays with long mechanical life should be selected to ensure their long-term stable operation. With the continuous development of science and technology, the mechanical parameters of modern power relay are also constantly improving, such as using new materials and new processes, to improve its performance and reliability. Therefore, in the selection, the latest technology development trend should also be considered to choose more advanced products.
4. Environmental parameters
In the performance and selection method of power relay, environmental parameters are very important factors. Environmental parameters include temperature, humidity, vibration, electromagnetic interference and other factors. When selecting the power relay, it is necessary to determine the environmental parameter range according to the actual operating environment.
For example, when using a power relay in a high temperature environment, it is necessary to choose a relay that can withstand the high temperature to ensure that it works properly. Vibration and electromagnetic interference can also affect the performance of the power relay, so it is necessary to choose a relay with seismic and anti-interference ability.
In practical application, it is also necessary to consider the installation mode and heat dissipation mode of the power relay to ensure that it will not be damaged by overheating during use. In conclusion, environmental parameters are important factors to be considered when selecting power relays, and their scope needs to be determined according to the actual use environment to ensure their normal operation.
Common power relay model and its characteristics
1, JQX-60f
JQX-60f is a commonly used 4-way AC electrical appliance, with the characteristics of simple installation, sensitivity and reliability. Suitable for relay control, motor conversion, AC power supply and other equipment.
2, MS60f
JZX-22F is an electromagnetic power relay, suitable for AC load control, with wide rated voltage and stable contact points.
3, SSR-10A A
SSR-10A A is a bidirectional solid-state relay suitable for DC load control. It is silent, has no contact, and has a long life span.
QIANJI Relay, China's top relay supplier, engaged in foreign trade industry for more than 30 years, quality, service is guaranteed!