To handle periodic changes in the primary circuit switching conditions, i.e. the
network topology, there shall be support for four (4) different setting banks for each
of the protection functions. The change of setting bank shall take place commonly
for all of the protection functions. It shall be possible to change the setting bank
locally from the LHMI, using a binary input signal and remotely through the
communication link. The change of setting bank shall happen rapidly and it shall not
result in a protection relay restart, a relay malfunction or a communication break.
The protection functions listed below shall be regarded as the compulsory basic
protection features. It shall be possible to either enable or disable each protection
stage, depending on the requirements of the actual application.