Re: power transformer


gabby said:


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.