LKB-3-2/10

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LKB-3-2/10 is an inductive type load switch whose range of application extends to any place where interrupting or short-circuiting current is necessary or desirable. It is also used in the telecommunication and power industry for protection, distribution, control, measurement, and switching operations. The structure of load switch of LKB-3-2/10 is the most important part and it can be divided into three pre-assembled sub-parts. The first part is a contact chamber with both main and auxiliary contacts, then the other two sub-parts are arc ignition chamber and arc extinction chamber.

The working principle of LKB-3-2/10 load switch is simple and very effective. The main contacts, despite being mechanical, are not immediately used for current interruption or short-circuiting. To avoid damage to the mechanical contacts when large currents are interrupted, an arc extinction chamber is provided between the main contacts and the contacts that control the arc current. When the load switch is active, the main contacts remain closed and the arc extinction chamber is filled with gas. When the voltage across the switch is greater than the blowing limit, the arc chamber’s gas ignites, forming an arc. This arc current continues to flow until the gas residual is low enough to extinguish it. This is done by quickly cooling the ionized air in the arc chamber, and the mechanical contacts are opened to stop the flow of current.

The input voltage across the switch is controlled by a protective device in the input portion of the load switch, when the voltage crosses the safety limit, the protection device would take action to switch off the LKB-3-2/10 load switch. This is done by using a bypass circuit around the load switch. If the maximum operating voltage of the equipment is exceeded, the bypass circuit causes the current to flow around the switch instead of through it. When this happens, the LKB-3-2/10 load switch automatically opens, protecting the equipment from being damaged.

Aside from protection, LKB-3-2/10 load switch is also used for switchgear, surge protection, voltage levels, distribution networks, and control systems. For these applications, the design of the load switch is modified to make it more suitable for these tasks. The interrupting capacity of the switch is made greater by changing the contact size, number of contact points, and increasing the arc extinction chamber. The LKB-3-2/10 load switch can also be used to control switching operations in power systems, as the unit is capable of switching up to 10 kV.

In conclusion, LKB-3-2/10 load switch is the ideal choice for a wide variety of applications that call for a cost effective, reliable, and efficient switching solution. The design of the switch is robust and the working principle is simple and easy to understand. The load switch is capable of providing various protection, control, and switching operations with minimum input voltage and current requirements.

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