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Generator circuit-breaker HEC 10 up to 210 kA

High-performance system solution for demanding power plant applications

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 with the following features: 

  • Fully type-tested exceeding the mandatory requirements of the latest GCB standard IEC/IEEE 62271-37-013
  • Equipped with an enhanced passive cooling system design based on the most advanced passive heat pipe technology, patented by Hitachi ABB Power Grids 
  • Features HMB-8 from the most reliable* spring operating mechanism family to provide safe performance throughout the entire lifespan of the GCB
  • Developed to protect the most demanding generator applications, having a rated generator-source short-circuit breaking current of 160 kA according to G2 class** 
  • Fully assembled and factory tested, brings substantial savings in time and cost for installation and commissioning  

Applications

  • New installations, replacement and retrofit of power plants up to 1,500 MW
  • Demanding generator applications according to G2** class

Why Hitachi ABB Power Grids?

  • Third generation of HEC technology encompassing almost two decades of Hitachi ABB Power Grids successful field experience
  • Fully type-tested exceeding the mandatory requirements of the latest GCB standard IEC/IEEE 62271-37-013

*  Most reliable spring operating mechanism as per paper A3-206 presented at CIGRE 2012

** For GCB with a rated generator-source short-circuit breaking current characterized at contact separation by a degree of asymmetry of 130 percent with the assigned a.c.component (alternating current) of the rated generator-source short-circuit breaking current.

Brief performance data

Type HEC 10-170L HEC 10-170XL HEC 10-210L HEC 10-210XL
Rated maximum voltage [kV] 31.5 31.5 33 33
Rated frequency [Hz] 50 / 60 50 / 60 50 / 60 50 / 60
Rated power frequency withstand voltage [kV]
(circuit-breaker / line disconnector)
80 / 90 80 / 90 80 / 90 80 / 90
Rated lightning impulse withstand voltage [kV]
(circuit-breaker / line disconnector)
150 / 165 150 / 165 150 / 165 150 / 165
Rated normal current [A] up to 20,000 up to 29,000 up to 20,000 up to 29,000
Rated short-circuit breaking current [kA] 170 170 210 210
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