Introduction
BRUSH combined cooled generators are widely used in steam turbine power generation, leveraging over 120 years of electrical experience. These generators are known for their ability to meet demanding turbine manufacturer requirements, competitive pricing, and efficient delivery.

Stator
The stator frame is a robust structure made from mild steel, designed to handle mechanical stresses and potential hydrogen coolant explosions. It features a core made from high silicon content electrical steel, with radial ventilation ducts and a two-layer diamond type winding using Roebel bars to minimize eddy current losses. The insulation system is resin-rich mica glass tape, capable of operating at high temperatures.

Rotor
The rotor is crafted from nickel chromium molybdenum alloy steel, featuring high conductivity copper/silver alloy windings. It is designed to withstand high mechanical forces and is tested for overspeed in a dedicated facility.

Bearings
Typically, the generators use fixed profile, white metal lined, hydrodynamic elliptical bearings, with options for tilting pad bearings and thrust bearings as needed.

Cooling
Cooling is achieved through a closed circuit system using hydrogen and water. The stator winding is directly water-cooled, while the rest of the machine uses pressurized hydrogen. The cooling system is designed for uniform temperature distribution.

Auxiliaries
The gas supply system is customizable for specific power station layouts, including hydrogen drying and air scavenging. The sealing oil system maintains oil pressure in shaft seals, and the cooling water is purified by an ion filter.

Excitation System
Generators are equipped with either a static excitation system or a shaft-mounted a.c. exciter with a static thyristor system, both digitally controlled for reliable operation and fast voltage regulation.

Features
Key features include reduced weight of active components, full factory testing, adaptability to any turbine design, compliance with international standards, low ventilation losses, and extended insulation life.

Specifications
Voltage range: 15 to 24kV
Speed: 3000 rev/min for 50Hz, 3600 rev/min for 60Hz
Excitation: Static or shaft-mounted a.c. exciter
Output range: 250 to 1,100MVA
Cooling: Closed hydrogen and water circuits

Experience
BRUSH turbogenerators are operational in over 130 countries, including Germany, China, and the Czech Republic.