November 11, 2019 - Siemens is expanding its HB3 generator circuit-breaker portfolio with a compact version. The HB3-Compact (HB3-C) offers the possibility for vertical or horizontal mounting and uses maintenance-free vacuum switching technology. These features make it suitable for retrofit applications in power plants, where the security of supply is crucial, and space is limited due to existing installations. The system will be presented for the first time at the European Utility Week 2019, taking place in Paris from November 12 to 14.
With its adaptable design and installation, the HB3-Compact model offers power plant operators the flexibility when designing a plant or replacing outdated equipment. It has a footprint, which facilitates the designing and dimensioning of the switchgear. Firstly, the supporting frame design can be customized. This means the phases can be fitted in one common or an individual frame design to enable splitting of the phases, for example when installing in different rooms. Secondly, the unit can be mounted horizontally, as well as vertically.
In addition, the phase-to-phase spacing as well as the phase height axis can be adjusted to match the existing busbar’s connection points. This enables integration into existing installations. To guarantee safe maintenance, the circuit-breaker can be fitted with integrated line and earth disconnecting switches. Line disconnecting switches are used to electrically isolate the switchgear or the generator from the grid. The earth disconnecting switches are used to connect the generator and transformer sides to the ground for additional safety.
HB3-C also works to help plant operators in saving costs during project implementation and operation. The maintenance-free vacuum switching technology used in the switchgears eliminates the need for gas handling, increases the recycling rate of the HB3 systems. The HB3-C is part of the Siemens Blue Portfolio, combining performance with environmentally safe materials and work procedures.
