Application of IEC 61850-9-2 in MV switchgear with sensors use

MV sensors (Medium Voltage Low-power stand-alone sensors) represent an alternative way of performing the current and voltage measurements needed for the protection and monitoring of medium voltage power systems. These sensors, based on alternative principles, have been introduced as successors to conventional instrument transformers and in connection with microprocessors based Intelligent Electronic Devices (IEDs) enable many benefits for both users and applications. However, to be able to fully utilize all advantages of MV sensors in MV Switchgear at primary distribution level, the way in which the voltage signal can be distributed in the switchgear has to be found. The IEC 61850-9-2 offers the solution. The combination of digitalization by use of IEC 61850-9-2 and MV Sensors brings a significant change to the way in which MV Switchgears and networks can be built. (4 pages)