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Delay relays-what are their structures?
The delaying operation of power-on
| 1. For this kind of device, the range of time can be very large, starting from several seconds up to several minutes. | 1. The delay accuracy is high, reaching the millisecond level. | 1. High delay accuracy, accurate to the millisecond or even microsecond level. | 1. High delay accuracy and good stability. | |
| 2. Structure is simple and inexpensive. | 2. The response speed is fast. | 2. The delay range is wide and can be adjusted as needed. | 2. The delay range is wide, ranging from a few minutes to several hours or even longer. | |
| 3. But the accuracy is comparatively low, and it highly depends upon ambient temperature and air pressure. | 3. However, the structure is relatively complex and the cost is high. | 3. Small size, light weight, easy to install and use. | 3. However, the structure is complex, the volume is large, and the cost is high. |
1. Industrial automation: used for controlling the start and stop of motors, sequential control, timed cycling, etc. For example, in automated production lines, delay relays can be used to ensure that each device starts and stops in a predetermined time sequence, improving production efficiency and safety.
4.Security system: used for access control, alarm system, etc. For example, in the access control system, a delay relay can be used to keep the door lock open for a certain period of time after the door is opened, making it convenient for personnel to enter and exit.
1. Relatively short delay range: Some electronic delay relays can achieve millisecond level delay, such as 20 milliseconds to 9.99 seconds, 0.1 seconds to 99.9 seconds, etc.
2. Medium delay range: The common range for air damping delay relays is 0.4 to 180 seconds.
3. Longer delay range: The delay range of electric delay relays is very large, and can even be extended to several hours or more, such as from 0.4 to 72 hours. In some other industries, large delay relays or specially customized delay relays have delays of several days or even months, such as 1-999 hours, 1-30 days, etc.
1. Power on delay: Suitable for situations where the output needs to be triggered after a certain amount of time has passed since the input signal (usually the power is turned on).
2. Power outage delay: When the input signal disappears (usually due to power disconnection), the output is turned off after a certain period of time.
Determine the required delay time range based on actual application requirements. If it is a short-term precise control, it may be necessary to choose millisecond level delay relays; If it is a long-term timed operation, such as a few minutes, hours, or even longer, it is necessary to select a relay within the corresponding .
For controlling small motors or low-power appliances, relays that can withstand only a few amperes of current may be necessary.For controlling large motors or high-power equipment, it is necessary to choose delay relays that can withstand large currents and voltages.
If high precision is required for the time delay, then select the high-precision delay relay. Some electronic delay relays can provide high precision, usually within ± 1%; Mechanical delay relays may have relatively low accuracy. Example.
During the course of precision instrument control, sometimes it is possible to achieve relay delayed accuracy within ±0.1 second.
For general industrial control applications, a relay with an accuracy of approximately ± 1 second may be good enough.
In addition, at a high-temperature working environment, such as more than 40 or 50 degree Celsius temperature, you should choose high-temperature-resistance delay relays.
Choose well-known brands and reliable quality delay relays to ensure their stable performance and long lifespan. QIANJI's delay relays have undergone long-term market validation in terms of quality and reliability, and can provide better after-sales service and technical support. Choosing QIANJI relays can reduce the risk of equipment failure and improve system stability.
