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miniature key:
Regarding the miniature switch, it can be said that the fuse is a protective device that is used in electrical equipment and circuits to cut off the circuit when the current exceeds the permissible limit so that other equipment is not damaged.
## Miniature keys use two mechanisms for their operation.
Bitmal function for overload protection
Magnetic function for short circuit protection
Miniature switches 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 two fast-acting and slow-acting states. They are also divided into K, D, C, B and Z types in terms of application.
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Type B miniature switch: This type of miniature switch is mostly used in the home and cuts off the overload current between 3 and 5 times the nominal current in a certain time. These types of switches are considered fast-acting.
C type miniature switch: This type of switch is mostly used in industry and cuts the overload current between 5 and 10 times the rated current in a certain time. This type of switch is considered a slow-acting type.
D-type miniature switch: This type of switch is mostly used in special industries such as transformers and cuts the overload current 10 to 20 times the rated current.
K type miniature key: this type of key is used in transformer and engine. It is usually between types 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: the miniature keys can be equipped with peripheral devices to detect on and off status or alarms.
### Points that must be observed when buying a miniature key:
Miniature key workflow
Miniature key type (depending on the place of use)
Accessories
The number of its bridges
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|---|---|
| Tel | +98 25-3×××5444, +98 25-3×××3444 |
| Mobile | +98 910×××6576 |
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| Website | http://www.automation24.ir |
| Country | Iran |
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