[Schneider three-phase 25 amp type C miniature switch (click here to buy the product)](https://www.automation24.ir/product-597/کلی?% AF-مینیاتوری-اش?% 86ایدر-سه-فاز-25-آم About the miniature switch, it can be said that the fuse is a protective device that is used in electrical equipment and circuits. It is used to cut off the circuit when the current exceeds the allowed limit so that other equipment is not damaged. Miniature switches use two mechanisms for their operation. Bitmal function for overload protection Magnetic function for short circuit protection Miniatures are divided into 2 single-phase and three-phase parts in terms of the number of bridges, and in terms of the cut-off time, they are divided into fast-acting and slow-acting states. They are also divided into types K, D, C, B and Z in terms of use. B type miniature switch: this type of miniature switch is mostly used in homes and the overload current is between 3 and 5 times the rated current. This type of switch is considered a quick-acting type. C type miniature switch: This type of switch is mostly used in industry and it cuts the overload current between 5 and 10 times the rated current in a specified time. The switch is considered a slow-acting type. D type miniature switch: This type of switch is used mostly in special industrial applications such as transformers and cuts the overload current 10 to 20 times the rated current. K type miniature switch: This type of key is used in transformer and engine. Its function is between type C and D. Z type miniature switch: This miniature will issue a shutdown command at a specific time when the passing current exceeds the rated current. This key is used in very sensitive circuits.
Note: In the case of miniature keys, peripheral devices can be installed to detect the on and off status or alarms.
Points that should be observed when buying a miniature key :
1. Working flow of miniature key
2. Type of miniature key (depending on the place of use)
3. Peripheral equipment
4. Number of its bridges
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