Generators & Motor

4 Pole Air Cooled Generators

Built upon 145 years of generator expertise, BRUSH offer customers bespoke turnkey products engineered to perform, built to last and offered with comprehensive lifetime Service support.


The 4-Pole DG generator range is designed to be driven by gas or steam turbines with outputs from 10 to 75 MVA.

With over 750 active installations, the time-proven DG range built in a European ISO accredited site are specified by leading geothermal, public utility, co-generation (CHP), industrial and offshore applications operators.

Manufactured from a one-piece forging of high-quality alloy steel, providing a minimum of 25 years’ service life, these units are based on a modular construction method that can be easily adapted to meet any turbine design. Units are factory tested, to reduce on-site testing and commissioning time.

The continued success in both gas turbine and steam turbine power generation can be attributed to BRUSH’s ability to meet the demanding interface requirements of turbine manufacturers, coupled with competitive prices and keen deliveries.

Key benefits

Custom Engineered Solutions
Lower Total Cost of Ownership (TCO)
Quick Installation Times
Hazardous Area Certified – IECEx /ATEX
Minimum 25 Years Design Life
Application Focus

Geothermal Energy

BRUSH has significant sector experience in geothermal applications. Group Engineering Lead, Jan van der Burg, was involved in the development of our highly specialised 4-pole ATEX and IECEx Zone 2 classified solution. With an output range of 15-75 MVA, it delivers the perfect solution for power generation in the world’s toughest environments

Technical Specifications

VoltageUp to 15 kV
ExcitationBrushless or static
InsulationClass F
Frequency50 or 60 Hz
Output10 to 75 MVA
DriveSingle or Double End Drive
DriverSteam Turbine / Aeroderivative Gas Turbine / Heavy Frame Gas Turbine
Design StandardsIEC, IEEE, CSA, ATEX, IECEx, ABS, DNV and Lloyds compliant

Key Features

High Efficiency
Up to 98.4% efficiency in service
High Availability
Proven high availability for all operating regimes – baseload, peak power (frequent start-stop on daily basis as peak units)
International Standards Compliance
Designed to meet in-country standards (eg CSA and specific grid code compliance)
Fast Start-up
Machines do not need to be held at defined speeds for certain timeframes, Ex ec removing need for purge and pressurisation cycle
Longevity and Durability
Operating in harsh environments for 25+ years

Strategic Parts Management

To protect against loss of revenue through unscheduled outages and ensure the reliable operation of capital equipment, we recommend a combination of OEM certified Operational Spares, Maintenance Spares, Strategic Spares and Commissioning Spares based on site configuration and site specific operational conditions.


Speak to Our Team

BRUSH has a global reputation for service excellence and dedicated customer support. Whether it’s the provision of parts or the delivery of service support in the field, at the customer’s premises or at our network of Service Workshops.

With a wealth of experience and knowledge expanding over more than 145 years, the capabilities of BRUSH are endless and service unrivalled, with engineers stationed worldwide and spare parts ready 24/7/365, it is a truly global organisation.