Do you know what is the difference between RCDs and RCBOs. RCDs
are designed for protection from electrocution or electrical fires. They do
this by automatically cutting off the supply of electricity whenever an
electric current leakage is sensed. The RCDs allow for continuous monitoring of
the current level passing through a wire in one single direction, and again in
the reverse direction. The circuit will be automatically broken in the event
that there is a difference of 300mA or less in some instances. This provides
the assurance of protection against electrical shocks.
You should be aware that RCDs will not react to overloads or
short circuits. They will have a standard rating that may be anywhere from 32A
to 64A. However, this rating corresponds with the internal contact and
switching mechanism. The device will not trip out when the standard rating is
exceeded. You will also see an indication of the imbalance that will need to
occur for the device to trip.
All RCDs come complete with a test button, allowing for the
simulation of an event involving disparity in the electricity supply. If the
device doesn’t trip during such a simulation, then it will have to be replaced.
There are some key differences between RCDs and RCBOs. The
RCBOs are integrated with an electronic switch and designed for the transfer
and breakage of currents under normal service conditions for the opening of
contacts when the residual current is of a certain level under defined
conditions. These devices are also designed for protection against overloading
and short-circuiting.
The RCBO will break the circuit if the current demand
exceeds a particular level. An overload may be sensed in the event of a short
circuit, or excessive demand due to the connection of multiple devices. This
will automatically cause the circuit to break. There would be a considerable
risk of the wires melting and catching fire if the circuit wasn’t broken. The
RCBO thereby provides protection for people, equipment, and property.
0 Comments