The basic knowledge of relays is as follows:
Relays can be used in communication equipment, automatic devices, household appliances, automotive electronic devices, and other places where circuit conversion functions are required. Because relays are composed of two parts, coils and contact groups, the graphic symbols of relays in circuit diagrams also include two parts: a rectangular box represents the coil; a group of contact symbols represents the contact combination. When there are not many contacts and the circuit is relatively simple, the contact group is often drawn directly on one side of the coil frame. This method of drawing is called concentrated representation. Our product Solid Silver Contacts is mostly used in relays, and the high-quality materials used have a high guarantee for the performance of the product.
Relay Applications
Relays are widely used in a wide range of fields, and their environmental conditions and technical requirements vary greatly. Even in different use occasions in the same application field, the requirements are not exactly the same. The following mainly cites some commonly used fields as examples for your reference:
1. Industrial control relays
In industrial control, the main control functions are completed by general AC relays. Relays are usually driven by buttons or limit switches. The contacts of the relay can control solenoid valves, larger starting motors, and indicator lights. The voltage is generally 24VDC, 220VAC.
The field of digital control has expanded the application of relays. Profile milling and coordinate boring are operated by data programming, and the signals are sent to the machine tool controller, memory unit and other logic elements to control 2 to 5 axes of the coordinate servo motor. This automatic control method is easy to control drilling machines, hexagonal lathes, ordinary lathes and automatic profile inspection machines. Our product Solid Silver Contact Rivets uses a high-precision computer control system in the production process, with precise control of precision and accuracy.
Digital control systems require relays to have the ability to adapt to low-level signals, medium sensitivity, fast action and high switching reliability.
In industrial machinery installation, environmental conditions must be considered. The running machinery and nearby equipment may transmit shock and vibration to the control cabinet, and there is also a risk of splashing cutting coolant. Although equipment manufacturers usually take protective measures for control components, when selecting and designing relays, it is still necessary to consider the impact of these harsh environments on the product, especially the durability and stability of the silver contacts. Silver Solid Contact Rivets can provide higher wear resistance and corrosion resistance, thereby maintaining the reliable performance of relays in the face of impact, vibration and liquid contamination.
2. Automobile field
In the automotive industry, relays are increasingly widely used, covering multiple important functions. Common relays include starter relays for starting motors, horn relays, motor or generator circuit breaker relays, charging voltage and current regulation relays, turn signal flasher relays, light brightness control relays, air conditioning control relays, sliding door automatic opening and closing control relays, and glass window lifting control relays. In these applications, relays using Silver Alloy Contacts can provide higher wear resistance and corrosion resistance, ensuring stable operation under high load and harsh environments, thereby improving the reliability and life of the automotive system.
The power supply in the car is now mostly 12V, and the coil voltage is mostly designed to be 12V. Because it is powered by a battery and the voltage is unstable; coupled with harsh environmental conditions, the pull-in voltage V≤60%VH (rated working voltage); the coil overvoltage is allowed to reach 1.5VH. The coil power consumption is large, generally 1.6~2W, and the temperature rise is high.
3. Household appliances
1. Air conditioner
Relays are mainly used in household appliances to control compressor motors, fan motors and cooling pump motors to perform related control functions. The power of household appliance compressor motors is usually between 1 and 3 horsepower, while the power of fan motors and cooling pump motors is 1/4 to 2 horsepower. In these applications, relays using Silver Alloy Point Contacts can provide better wear resistance and corrosion resistance, ensuring that the relays can maintain stable performance and long service life under high load and frequent switching working conditions. The advantages of this contact material can significantly improve the reliability and durability of household appliances.
Due to the instant of load startup, a large surge current occurs, which is about 6 times the full-load operating current. The compressor motor takes a long time to reach full speed, which poses a serious threat to the relay contacts. Therefore, the load capacity of the relay is required to have sufficient margin; the contact bounce when the relay is attracted is required to be eliminated as much as possible; the relay is required to release quickly and minimize the contact bounce.
2. In the field of household appliances, relays are used in washing machines, microwave ovens, electric heaters, etc.
Relay contact load: It can be as large as 220V, 5000W heater (or 1 horsepower motor) load, as small as driving solenoid, other relay coils, indicator lights and other small loads. The expected life of the relay is required to be 5 to 10 years. That is to say, the electrical life of the relay is required to be 105 times to 2×105 times.
our products
Our Silver Solid Contact Rivets products are designed for high performance and high reliability to meet the needs of a variety of harsh application environments. Using advanced silver contact technology, our products provide excellent wear and corrosion resistance, and can maintain stable performance and long-term durability even under high load and frequent switching conditions. Whether it is home appliances, industrial equipment or automotive applications, our silver contacts can ensure the reliable operation of the equipment and reduce maintenance costs. Choosing our silver contacts, you not only get excellent quality assurance, but also enjoy continuous high efficiency and stable performance, making your equipment run safer and longer.
