Load break switches can't interrupt a short circuit but they can switch loads on and off. Often used in substations to connect transformers to power lines, or in industry to manually disconnect loads, they are the inexpensive work horses of the switchgear family.
Load Break Switch Function : Electrical switches work according to a fairly basic design. The familiar on/off toggle switch is the most common. Three way circuits and dimmer circuits work off of a similar design. Three-way circuits are made up of two separate switches that control the same device(like a lamp); whereas a dimmer circuit merely regulates the amount of electricity that gets through.
Electrical circuits only work when the electricity is free to move through in a continuous loop. Once that loop is broken, the electricity is cut off. This is where the switch comes in. An on/off toggle circuit breaks the current when it's in the "off" position. When it's in the "on" position, the current--or loop--is completed.
Switchgear Accessories : The power source in a home is the fuse box. In order for an electrical switch to work it has to be connected to the fuse box and the load. A special type of cable called Romex is used to connect the power source to the switch, and to the electrical outlet that powers the load. Inside this insulated cable are three wires -a hot wire, a neutral wire, and a ground wire. The hot wire connects to one of the terminals on the switch, and to the outlet that powers the load. The neutral wire connects the other terminal to the load. The ground wire connects to the outlet.
Electrical contacts inside the switch are what join the two terminals together. When a switch is turned on, these contacts are connected. When a High Voltage Earthing Switches are turned off, it causes a break between these contacts. In effect, the current is controlled by whatever position the switch is in.
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