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| You are here: Home >> News-Classification and selection of time relay |
| Classification and selection of time relay |
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The publisher：admin Release time:2012/12/4 Read：309Secondary |
Time relay as a relay in one of the most common types of, in our work and life have a very important role. The principle is based on the input signal for a certain time remaining - " delay ", then continue execution input type command, thereby completing the circuit control. Time relay small living appliances, to high technology, such as spacecraft etc, are the traces of. This article will elaborate on the classification and selection of time relay point.
The first simply introduces time relay classification: if only considering the action principle. Time relay can be mainly divided into the following categories: transistor type, such as JS20 transistor relay; electronic type, such as JSS1 electronic relay; electromagnetic type. General air used most generally, electric and transistor performance better, but the price is relatively high. On the categories and characteristics of relay specific differences, in a later article is discussed in detail, the following introduces some main points of selection.
Generally speaking, choice of time relay, to consider the main factors is the range of delay, delay, delay precision and working conditions of the type. Of course not ignore some basic factors, for example, rated voltage, rated current selection.
Time relay in the corresponding to use category contact rated voltage Un and rated working current of In, characterization of the contact of the relay can switch circuit capable of. When selected, relay maximum working voltage for the relay of the rated voltage of Ui. Maximum working current relay should generally be less than the rated thermal current relay. Usually a relay provides several rated working voltage, along with a list of the corresponding rated current ( also can list control power ). It also determines the time relay of the entire process. Then use the category selection, such as AC, or dc. The coil switching attention must also be considered. Finally, some specific service conditions. Such as the surrounding environment, temperature, pollution level, altitude, vibration and so on and so forth. Here there was complex, specific can see corresponding time relay product manual.
To the product, the most important and the most important objective is stable and reliable, and can ensure the precision of. The above mentioned about the time relay selection is very shallow, the selection of specific time, also needs to be combined with practical, concrete analysis of concrete problems. But the most important is to understand what you really need. |
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