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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.

HEC 7/8 for 170-210 kA: With short-circuit ratings from 170 to 210 kA, HEC 7/8 is suitable for power plants up to 1,600 MW and is recommended for retrofits or replacements of old generator circuit-breakers (GCBs) in air-blast technology. Naturally cooled up to 25,000 A, its interrupting technology allows to clear fault currents exhibiting very high degree of asymmetry up to 120-130 percent.
The 3-phase system includes circuit-breaker, disconnector, capacitors and control cubicle, and offers a wide selection of additional components, such as earthing and starting switches, current and voltage transformers and surge arresters. It is delivered fully assembled to minimize the installation and commissioning time at site.

HEC 10 up to 210 kA: HEC 10 GCB is a compact design capable of carrying normal currents up to 29,000 A as well as interrupting short-circuit currents up to 210 kA to protect the most critical generator applications up to 1,500 MW. Based on the well-proven HEC technology with over two decades of successful field experience, it is an enhancement of type HEC 7/8/9

HECPS-3/5S for 80-130 kA: The integrated solution HECPS-3/5S is unique in the market providing all functions required by pump storage power plants (PSPP) in one system and from a single manufacturer.

HECS for 80-130 kA: The wide range of ratings with short circuit current from 80 to 130 kA and rated current of up to 23,000 A makes HECS the most used GCB in the world for generators up to 800 MW. The complete range of HECS is naturally cooled and its reliability is proven by over 2,000 installations worldwide since 2003.

HECS-R for 80-130 kA: HECS-R is the world’s most compact GCB, which makes it ideal for replacement and retrofit. The three circuit breaker poles, together with the hydro-mechanical spring drive, supervisory, and control elements, are mounted on a common frame. Phase distance can easily be selected to suit the connected busbar.

HVS-63S up to 63 kA: The HVS-63S GCB with SF6 interrupting technology for short-circuit currents up to 63 kA and rated currents up to 7,150 A suitable for generators of up to 200 MW.

HVR-63 up to 63 kA: The HVR-63 is the latest generation Hitachi Energy GCB and it is best suited for retrofits or replacement in power plants with unit power of up to 180 MW. The open design and small footprint makes it ideal for open and cubicle installations, and for short-circuit ratings of up to 63 kA.

VD4G up to 63 kA: VD4G is a generator circuit-breaker (GCB) with vacuum interrupting technology for short circuit currents up to 63 kA, 15 kV and rated currents up to 3,150 A with natural cooling (4,000 A with forced cooling) suitable for generators up to 90 MW.

Digital Generator circuit-breaker (GCB): Hitachi Energy digital generator circuit-breaker (GCB) is enabled to aggregate, analyze and manage health data collected through GMS600, the smart monitoring system to increase power plant availability. Capable of real-time remote monitoring of gas levels to minimize the environmental impact, temperature to increase availability as well as ablation to maximize GCB lifetime.

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