The introduction of fuse cutout switch

The fuse cutout switch combines the traditional fuse and switches into one fuse combination electrical appliance. The fuse cutout switch not only can be operated with a load but also has obvious current limiting characteristics and good selection characteristics, which can realize the best protection of the line and can be widely used in low-voltage power distribution systems. Next, let's take a look at the introduction of thefuse cutout switch. Here are some answers.

Here is the content list:

•  What is a fuse cutout switch?

•  The advantages of fuse cutout switch for line protection.

•  The role of fuse cutout switch.

What is a fuse cutout switch?

We know that the main function of a general switch is to cut off small currents and change the mode of operation. I don’t know if you noticed it. One of them is to disconnect the small current. This is the problem. When the current is large to a certain extent, it may damage the parts used for isolation in the switch, thereby rendering the switch unusable. Taking this into account, to be able to disconnect large currents, and more importantly, to protect the isolation switch when facing large currents, a fuse needs to be provided for protection, so that such a switch is called a fuse cutout switch. To be more professional, it can be defined as follows: A fuse cutout switchneeds to meet the following three points: First, protect the switch by using a fuse. Second, an isolating switch that can make, carry and break the current under normal circuit conditions (including specified overloads), and can carry current under specified abnormal circuit conditions (such as short circuits) within a specified time. Third, it can provide safe isolation for the circuit, and ensure that the circuit is opened and safe to work when in the open position.

The advantages of fuse cutout switch for line protection.

The use of a fuse cutout switch for line protection not only has the characteristics of a fuse but also has the following advantages: First, the time and current characteristics of the fuse are determined by the performance of the melt. The time and current characteristic curve of the fuse are closer to the thermal endurance characteristic curve of the protected circuit, and it has a better overcurrent protection effect. Second, the fuse cutout switch can open and close under rated load. Third, although the melt of the fuse only has a one-time braking function, the fuse cutout switch can be used to replace the melt with the same specification, and it is very easy to put into operation again. Fourth, the fuse cutout switch can realize the remote monitoring function in the low-voltage power distribution network.

The role of fuse cutout switch.

The fuse cutout switch can be operated with load and is suitable for rated current 40A-630A. The fuse cutout switch can be hung on the busbar or the fixed board, and provides upper and lower input and output structures, with knife-edge introduction and arc extinguishing devices, and a closed detection hole on the switch cover, and a built-in signal switch, detection switch. An optional fuse detector can also be used as a knife switch. The fuse cutout switch is suitable for high short-circuit current distribution circuits and motor circuits with AC 50HZ, rated voltage up to 660V, and agreed heating current up to 630A. It is used as a power switch for manual infrequent operation, isolation switch, emergency switch, and circuit short circuit for protection.

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