This work package is related to usage of non-conventional instrument transformers and sensors in digital substations. This is primarily optical current transformers with their merging units and fault indicators. A special concern is the interoperability of existing technology and new censors in differential protection schemes. Testing and qualification of non-conventional sensors in NTNU high current lab will be made. The Topics of interest in this WP are:

• Non-conventional instrument transformer performance
• Merging units, synchrophasors, sampled values precision and accuracy
• Multi-vendor applications, interoperability
• Application in relay protection
• Wide-area disturbance identification
• 1 PhD