Mankind has come up with a huge amount of technical means and devices, not only allowing to secure a person’s life, but also to make working with high-voltage devices simple and affordable. Such devices include the so-called RCD, or the well-known residual current device.
The protective power cut-off device is a special device that, upon reaching a certain value of the differential current, simply stops its supply, making it impossible to cause fires and other dangerous situations associated with the effects of electric current on a living organism. Few people know, but RCDs are often used to turn on and conduct currents.
In what cases is the use of RCDs appropriate
Many people ask, why use RCDs in everyday life and is this strange apparatus really necessary?
Firstly, RCD helps protect any person from fatal electric shock. An accident can happen at almost any time, if you inadvertently touch the open part of the appliance that is under high voltage or exposed wiring.
Secondly, it is used to prevent fires when a leak occurs in the ground or on the equipment casing. RCD helps to protect buildings from fires, entrusting themselves with the task of turning off the current during dangerous voltage drops. According to statistics, most fires occur precisely because of current leakage, RCDs can promptly detect and disable dangerous voltages that exceed the boundaries of 300-500 mA.
RCDs come in several types. Thus, the device can be voltage dependent and independent, automatic and mechanical, stationary or mobile, as well as general or selective. The type of device is determined by the mains voltage, operating conditions, as well as the purposes for which the device is set.
