Isolation switch is a basic element used in electrical switchboards. Isolation switches are used to disconnect power in case of failure or maintenance, and they are installed in distribution boxes as main power switches. The operation of the isolation switch can be divided into two functions. The first is the situation in which an overload occurs, meaning an increase in electric current in the circuits above the allowable value. In this case, the switch is responsible for correctly delivering power to the main circuit and disconnecting voltage in case of a short circuit. The second function is isolating the circuit, allowing safe repairs of the electrical installation to be conducted. The insulation gap is used only in high and medium voltage devices, whereas it is not required in low voltage applications.
There are several types of isolation switches available, and when choosing one, it is always necessary to determine what parameters are appropriate for us. Switches are usually defined by the following parameters:
– rated voltage
– rated impulse withstand voltage
– rated switching voltage
– short-time rated current
– rated current
– capacity to switch short circuits (rated making capacity)
Fuse switches are those that have replaceable fuse inserts in their design. A fuse insert is a type of electrical protection, where the melting of one of the elements causes interruption of the electrical circuit continuity. The function of a fuse switch is also (like the isolation switch) to protect the electrical installation. These switches are installed in main distribution boards of multi-family buildings or in industrial power supply installations. This type of switch is divided into two categories:
– NH fuse switches
– NH busbar fuse switches
When it comes to purchasing switches, it is always advisable to choose trusted manufacturers. Currently, there are many models available on the market that meet all requirements. Purchasing isolation switches from wholesalers is always a good choice, as we can obtain better prices, not necessarily only when buying larger quantities. However, if we are unsure which type to choose, the internet will certainly help us. Under the name isolation switches store, we can find both physical and online stores offering the sale of these products. When we go to a physical store, we will certainly receive professional assistance in selecting the isolation switch that is right for us.
Source: external material
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