Highest installed base in the world
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.
It has the lowest lifecycle cost with up to 20,000 CO no-load operations or 20 years between main overhauls.
With smaller and standardized dimensions, HECS is easy to install and highly suitable for replacements and retrofits.
The 3-phase system includes circuit-breaker, disconnector, capacitors and control cubicle, and offers 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 on site.
- All type of power plants up to 800 MW
Why Hitachi Energy?
- Fully natural cooling
- High mechanical endurance to minimize the lifecycle costs
- High reliability supported by a long and worldwide reference list
- Fully type tested according to the IEEE C37.013, the worldwide GCB standard
Brief performance data
|Rated maximum voltage [kV]||23||25.3||25.3|
|Rated frequency [Hz]||50 / 60||50 / 60||50 / 60|
|Rated power frequency withst. [kV]||60 / (80)||60 / (80)||60 / (80)|
|Rated lightning impulse withst. [kV]||125 / (150)||125 / (150)||125 / (150)|
|Rated short-circuit breaking current [kA]||80||100||130|
|HECS with 50 Hz|
|Rated normal current [A] S:||up to 8,500|
|Rated normal current [A] M:||up to 10,500||up to 10,500|
|Rated normal current [A] L:||up to 13,000||up to 13,000|
|Rated normal current [A] Lplus:||up to 14,500||up to 14,500|
|Rated normal current [A] XLp:||up to 18,000||up to 18,000|
|Rated normal current [A] XXLp:||up to 23,000|
|HECS with 60 Hz|
|Rated normal current [A] S:||up to 8,000|
|Rated normal current [A] M:||up to 10,000||up to 10,000|
|Rated normal current [A] L:||up to 12,000||up to 12,000|
|Rated normal current [A] Lplus:||up to 13,700||up to 13,700|
|Rated normal current [A] XLp:||up to 17,100||up to 17,100|
|Rated normal current [A] XXLp:||up to 21,700|
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