MiCOM Alstom P74x (P741,P742,P743):  High Performance Busbar Protection 
MiCOM Alstom P74x numerical busbar protection scheme provides complete protection for all voltage levels. One of the fastest and most complete in its class, the MiCOM 74x provides secure and sensitive protection for all types of voltage busbar configurations. 

Basic description:

• Provides secure and sensitive protection for all types of busbar configurations, at all voltage levels 
• Engineered to provide a centralised or a distributed architecture 
• Includes CT saturation detection and dynamic topology processing algorithms 
• Fast reset (less than 1 cycle) circuit breaker failure element