Varaoke International Oy

https://varaoke.eu/products/power-plant-energy-supply/peter-brotherhood-turbine-generator-set-3-6-mw-42-bar-480-c-extensive-overhaul-2023-2024-in-operation-until-june-2026/

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Varaoke International Oy
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Kullervonkatu 20 B 112
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Harri Aikio
Kullervonkatu 20 B 112
33500 TAMPERE

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Sulje [x]

Peter Brotherhood Turbine Generator Set. 3.6 MW | 42 bar / 480 °C | Extensive Overhaul 2023–2024 | In operation until June 2026

Peter Brotherhood 3.6 MW Steam Turbine Generator Set

Complete industrial steam turbine generator set originally supplied for power generation and steam extraction service.

The unit consists of a Peter Brotherhood geared extraction steam turbine coupled through a reduction gearbox to a BRUSH synchronous generator.

The turbine-generator set was in normal industrial operation until June 2026 and was taken out of service in very good operating condition.

A comprehensive overhaul was carried out in 2023–2024, making this unit an attractive opportunity for industrial power generation, CHP and steam process applications.

The equipment is currently available for inspection.

Extensive technical documentation, drawings and photographs are available.

Technical Data – Steam Turbine

Manufacturer: Peter Brotherhood Ltd., England
Type: Geared extraction steam turbine
Turbine frame: 13B
Rated output: 3,692 kW
Steam inlet pressure: 42 bar(a)
Steam inlet temperature: 480 °C
Extraction pressure: 12 / 16 / 18 bar(a), min. / normal / max.
Exhaust pressure: 0.65 / 2.2 bar(a), normal / max.
Turbine speed: 9,067 rpm
Generator speed: 1,500 rpm
Gearbox ratio: 6.045 : 1
Rotation: Counter-clockwise viewed from steam end
Control system: Woodward 505E Digital Controller

 

GENERATOR – TECHNICAL DATA

Manufacturer: BRUSH Electrical Machines Ltd., England
Type: Synchronous Generator
Frame Size: BJHW 45L.101/4
Contract No.: O1/61914A
Rated Output: 3,692 kW / 4,615 kVA
Terminal Voltage: 6.3 kV
Rated Current: 422.9 A
Frequency: 50 Hz
Speed: 1,500 rpm
Power Factor: 0.8
Enclosure: IP44
Applicable Standard: BS 5000 Part 99
Cooling: Water-cooled air cooler, fresh water
Cooling Water Flow: 5.4 l/s
Cooling Water Inlet / Outlet: 25 / 30.8 °C
Air Flow: 6.1 m³/s
Rated Air Inlet Temperature: 40 °C (25 °C cooling water inlet)
Year: 1994

 

Condition

Very good operating condition.

The turbine-generator set remained in normal industrial operation until June 2026.

The complete turbine-generator set underwent an extensive overhaul in 2023–2024.

Detailed maintenance and overhaul documentation can be made available to serious prospective buyers.

Control & Auxiliary Equipment

The turbine-generator installation includes extensive control, monitoring and synchronization equipment.

The equipment includes turbine monitoring and control panels as well as generator measurement and synchronization panels.

Turbine control system: Woodward 505E Digital Controller
Vibration monitoring: Sensonics monitoring system

 

Generator Transformer

Generator transformer and associated electrical equipment are available – final scope of supply to be confirmed.

 

Documentation

Extensive technical documentation is available, including:

  • General arrangement and foundation drawings
  • Turbine-generator technical documentation
  • Control and instrumentation documentation
  • Maintenance documentation
  • 2023–2024 overhaul documentation
  • Additional detailed drawings and manuals available on request

 

 

Recent Overhaul & Condition – 2023–2024

GENERATOR

The BRUSH generator was included in the 2023 major overhaul and inspection of the complete turbine-generator unit. The generator was inspected and serviced, followed by alignment and vibration measurements as part of the complete rotating machinery train.

Following the overhaul, condition-monitoring measurements performed in January 2024 showed low and stable vibration levels. The generator was classified in Condition Class A, with no indications of developing faults.

STEAM TURBINE

The Peter Brotherhood Frame 13B steam turbine, gearbox and associated valves underwent an extensive overhaul and inspection in 2023. The turbine was dismantled, cleaned and inspected, including the rotor, turbine casing, bearings, valves and other critical components.

Extensive NDT inspections were performed. The turbine rotor magnetic-particle inspection found no defects, and inspections were also carried out on components including the turbine bearings, casing, control and trip-valve components.

The turbine rotor was professionally high-speed balanced by Howden ČKD Compressors up to its nominal operating speed of 9,067 rpm. Final measured bearing-housing vibration levels were 0.282 / 0.277 mm/s RMS, compared with the permissible value of 0.450 mm/s.

Following the overhaul, the complete turbine–gearbox–generator train was returned to operation. Follow-up condition measurements in 2024 classified the turbine, gearbox and generator in Condition Class A.

Extensive overhaul, inspection, NDT, rotor balancing, alignment and condition-monitoring documentation is available upon request.

 

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