Difference between load switch and isolating switch
1. The current cut by the two is not the same
Because the isolating switch does not have an arc extinguishing device, it is only suitable for cutting off the unloaded current, but cannot cut off the load current and short-circuit current. Therefore, the isolating switch can only operate safely when the circuit is safely disconnected, and it is strictly equipped with load operation to avoid safety accidents.
Because the load switch has an arc extinguishing device, it can cut off the overload current and the rated load current, but it cannot cut off the short-circuit current.
2. The load switch has an arc extinguishing device, while the isolating switch does not have such a device
So is there any difference between this arc extinguishing device? The so-called arc extinguishing device is to better help the opening and closing of the switchgear, and it can also effectively limit the arc and help the arc extinguish. There is such an arc extinguishing device, which is safer for switching appliances. Therefore, most of the switching appliances are equipped with arc extinguishing devices. Especially home switch appliances.
3. The role of load switch and isolating switch is different
Because the isolation switch does not have an arc extinguishing device, it is generally used in the part of the high-voltage circuit device that needs to be live and the part that needs to be powered off to perform an isolation function, so as to ensure the maintenance and inspection of the high-voltage circuit by personnel and ensure the safety of personnel.
The load switch is applied to fixed high-voltage equipment, which can cut off the fault current and rated current in the high-voltage equipment, so the functions of the two are different, but both are applied to high-voltage equipment. Of course, in low-voltage electrical appliances, there are also related isolating switches and load switches.
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