Some Key Points in Selecting Time Relays

Generally speaking, when selecting a time relay, the most important factors to consider are delay range, delay type, delay accuracy and working conditions. Of course, some basic factors will not be ignored, such as the selection of rated operating voltage and rated operating current.
The rated operating voltage Un and rated operating current In of the contacts of the time relay under the corresponding use category represent the ability of the relay contacts to switch circuits. When selected, the maximum working voltage of the relay can be the rated insulation voltage Ui of the relay. The maximum operating current of a relay should generally be less than the rated heating current of the relay. Usually a relay specifies several rated operating voltages and lists the corresponding rated operating current (control power can also be listed). This also determines the entire process of the time relay. The next step is to choose the type of use, such as AC or DC. Precautions for coil switching must also be considered. Finally, there are some specific usage conditions. Such as surrounding environment, temperature, pollution level, altitude, vibration and other factors. What is involved here is very complicated. For details, please refer to the instruction manual of the corresponding time relay product.
For a product, the first and most important purpose is to use it stably and reliably while ensuring its accuracy. The selection of time relays mentioned above is only very superficial. When selecting the type, it is necessary to combine the actual situation and analyze the specific problems in detail. But the most important thing is to understand what you really need.