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Bidirectional Circuit protection devices
Amendment 3
of the 18th Edition
Unidirectional protective devices are marked to indicate the line and load terminals and are designed to work when the power can only flow in one direction, i.e., from supply to load. It is vital to observe the connection details.
- Bidirectional protective devices, IET
Circuit Protection devices suitable for unidirectional power flow
A protective device that does not have markings to indicate line and load terminals is a bidirectional device, where power flow in either direction will not cause damage.
- Bidirectional protective devices, IET
Circuit Protection devices suitable for bidirectional power flow
* For circuits featuring bi-directional power flow that require RCBO protection, this can be acheived using an MCB in series with an electromechanical RCCB.