TSI is a microprocessor controlled precision instrument displaying steps of MV/HV transformers. The unit determines the step by measuring the resistive converter of the transformer. The step information is displayed on the screen.
Additionally it is output through the 4-20mA analog output. This information may be fed to automation systems or to the next TSI unit. It can also display the step information from the analog value coming from another TSI unit. With analog inputs and outputs, an unlimited number of TSI units may be cascaded.
The supply inputs of the unit are isolated from measurement inputs. It operates between 85 -265 VAC or 80-250 VDC