Generator circuit-breaker HEC 9 for 250-300 kA

HEC 9 has been developed as a system for large-sized power plants such as nuclear, coal-fired and hydropower plants. It has the world's highest performance with short-circuit currents up to 300 kA and it is also highly suitable for retrofits or replacements of old GCBs in air-blast technology.

Based on Hitachi Energy's well-proven and highly reliable SF6 technology, it enables lower lifecycle costs and gives a time-to-overhaul period of up to 20 years.

It is delivered in single-phase systems to facilitate the transportation and installation with plug-in design to minimize the activities at the site. Besides circuit-breaker, disconnector, capacitors and control cubicle, it also includes a wide selection of additional components such as earthing and starting switches, current and voltage transformers and surge arresters.
 

Applications

• Load current up to 33,500 A
• Power units up to 2000 MW
• Indoor or outdoor installations
• Replacements or retrofits of old units

Why Hitachi Energy?
 

• Naturally cooled up to 28,500 A
• Delivers the highest performance rates
• Provides the lowest lifecycle costs - maximum system availability and reliability
• Based on SF6, it is the only alternative to old and obsolete GCBs in air-blast technology
• Fully type tested according to IEEE C37.013, the worldwide GCB standard