Disconnecting Circuit Breaker (DCB) with Fiber Optic Current Sensor (FOCS) 420 - 550 kV for Digital substations

The DCB with FOCS includes three functions in one device: measurement, interruption and isolation. FOCS is a Fiber Optic Current Sensor that replaces the conventional current transformer for current measurement. Integrating the FOCS into a DCB (Disconnecting Circuit Breaker) provides the following advantages:

• Short-circuit performance at twice the industry standard 
• Faster installation times; plug and play
• One FOCS replaces many CT cores, simplifying design and engineering substations
• Lower environmental impact 
• More intelligent protection and control due to smart process bus interface  

A Disconnecting Circuit Breaker (DCB) provides the functions of a circuit breaker and a disconnector combined in a single unit. Read more
 

• Smart grid enabled as per IEC 61850-9-2LE
• Line, transformer, reactor and capacitor switching 
• Switching for harmonic filters 
• Suitable for industry applications due to low space requirements and high reliability

• Only solution with optical current measurement integrated in a disconnecting circuit breaker
• World leader in optical current measurement systems 
• Fully redundant, hot swappable plug and play solution 
• Local and global Hitachi ABB Power Grids industry and application support 
• Global service organization, local everywhere