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1 TAKE PERFORMANCE TO A HIGHER LEVELIN A DEMANDING MARKETPLACE WHERE OPTIMUM PERFORMANCE IS VITAL, BRUSH PERFORMANCE UPGRADES CAN MAKE THE COMPETITIVE DIFFERENCE TO YOUR BUSINESS FACT, YOUR ENTIRE OPERATION CAN BENEFIT FROM INCREASED POWER OUTPUT AND GREATER CONTROL DELIVERED BY BRUSH PERFORMANCE UPGRADESWhat s more, you ll have the added reassurance of more secure systems, reduced downtime, and greater stability in power supply. And, in an industry sector with heavy downtime penalties, BRUSH Performance Upgrades will also minimize disruption. Our BRUSH Performance Upgrades include: Excitation systems Cooling systems Ground fault monitor retrofits Lubricating oil systems Sealing oil systems Cooling gas systemsBACKED BY A WORKFORCE WHOSE EXPERTISE AND TECHNICAL EXCELLENCE INCLUDES A COMBINED 600 YEARS EXPERIENCEFig 1 BRUSH generator modelspower output upgrades MODEL DRIVERBDAX 75-305 PHFRAME 5 BDAX 75-84 PFRAME 5 BDAX 75-84 PHFRAME 5 BDAX 75-92 PFRAME 5 BDAX 75-92 PHFRAME 5 BDAX 7-84 PHFRAME 5 BDAX 7A-167 ELM2500 BDAX 8-300 EFT4 BDAX 8-355 EFT4 BDAX 8-400 EFT4 BDAX 9-450 EHFRAME 9 YDAX 7-265 PFRAME 5 YDAX 75-225 PFRAME 5 BRUSH MODEL DRIVERBDAX 70-66 PFRAME 5 BDAX 70-66 PHFRAME 5 BDAX 70-76 PFRAME 5 BDAX 70-76 PHFRAME 5 BDAX 70-84 PFRAME 5 BDAX 70-84

2 PHFRAME 5 BDAX 70-92 PFRAME 5 BDAX 70-92 PHFRAME 5 BDAX 7-145 ELM2500 BDAX 7-145 PLM2500 BDAX 7-167 ELM2500 BDAX 7-167 EHLM2500No need to replace your generatorIndustry practice has always dictated that increased power output requires generator replacement. However, through extensive innovation, research and development, BRUSH has developed an alternative response to this challenge which eliminates the need to replace your fact, we can boost the power output of your BRUSH generator by as much as 23%* when we replace your conventional rotor with a radially-cooled version. Furthermore, when this procedure is combined with an upgrade to the heat exchanger, power can potentially be increased by an outstanding 35%*.

3 The increased output occurs because a radially-cooled rotor improves the airflow through the rotor windings, allowing for increased rating of the table below shows some of the BRUSH generator models that can benefit from a power output OUTPUTUPGRADE GENERATORS WITH CONVENTIONALLY COOLED 2-POLE ROTORSCASE STUDY:Statoil Norne FPSOP roblem: Statoil wanted to increase power output without incurring the expense and downtime of replacing their existing BRUSH Performance Upgrade: BRUSH replaced the existing conventional rotor with a radially- cooled version, resulting in a 23% rise in available power output and by combining this with an upgrade to the heat exchanger a further 12% was achieved to give an overall increase in potential power output of 35%.

4 Now Statoil only use the upgraded generator, keeping the second on standby for planned outages and unscheduled events. In addition, Statoil benefit from greater flexibility and more MODEL DRIVERBDAX 7-193 PFRAME 5 BDAX 7-225 PHFRAME 5 BDAX 7-265 ELM5000 BDAX 7-265 PHFRAME 5 BDAX 7-275 PHFRAME 5 BDAX 7-290 ELM5000 BDAX 7-290 EHLM5000 BDAX 7-290 ESSLM5000 BDAX 7-340 PHFRAME 6 BDAX 75-250 PHFRAME 5 BDAX 75-275 PHFRAME 5 BDAX 75-290 EFRAME 6 ENHANCED SYSTEMS FOR ENHANCED PERFORMANCE* Subject to design evaluation by BRUSH S highly experienced team of dedicated generator engineersThe PRISMIC A50 excitation system delivers unsurpassed levels of power and flexibility. This makes it ideal for hydro-electric, coal, steam, gas and nuclear power plants, plus it s equally suited to synchronous motors and condensers.

5 The PRISMIC A50 is also suitable for new installations, and it lets you upgrade outdated equipment without incurring the cost and downtime of installing a complete new system. The PRISMIC A50 s strikingly compact and elegant design requires few additional components, allowing for a control panel design that s both simple to use and easy to maintain. In addition, the A50 comes with all the necessary firmware and application logic, so a microsystem or programmable logic controller is not PRISMIC A50 boosts performance in several key areas:SynchronizationYou can synchronize generators to a power distribution system which can replace conventional stand-alone digital technology allows for distributed control, high-speed parameter setting and remote the stable regulation of synchronous machines in a variety of operating modes in both steady-state and transitional A50 EXCITATION SYSTEM UPGRADEP roblem.

6 Demanding environmental requirements in particular, compliance with LCPD (Large Combustion Plant Directive) 2 demanded an upgrade of the digital excitation system at s Ratcliffe-on-Soar Power Station. High reliability and dependable support were both essential to the successful completion of this Performance Upgrade: BRUSH fitted the PRISMIC A50,taking just 14 weeks to manufacture, test and deliver the product, which successfully met every electrical engineers installed and commissioned the system, providing flexible site support and gaining site acceptance from the National STUDYR atcliffe-on-Soar Power Station MAKE THE COMPETITIVE DIFFERENCE TO YOUR BUSINESS For dramatic dirt contamination reduction The BRUSH GMS PPV (Positive Pressure Vent) upgrade significantly reduces dirt contamination, whilst also reducing the potential hazard of hydrogen ingress.

7 Lacking external blowers and motors, the BRUSH GMS PPV gives a passive upgrade to the existing exciter housing. Many BRUSH customers undergoing an initial PPV upgrade have returned to us for additional unit upgrades because of the many benefits that such a procedure can contamination affecting brushless exciters Dirt contamination is a common problem for brushless exciters, with unfiltered ambient air being ingested by the exciter fan to replenish air that leaks out of the exciter housing. Typical leakage areas include door seals, base seal and the shaft seal. Miscellaneous openings, which also contribute to dirt contamination, include those for entry of the cooling water piping, as well as oil piping, electrical wiring and conduit into the air vents a major cause of dirt-laden air ingress Adding to the problem of dirt ingress is the exciter s ventilation scheme.

8 There are three zones in the OEM brushless exciter the fan, bearing and diode wheel zones; and because the make-up air vents are located in the diode wheel zone, it will inherently operate at negative pressure (below atmospheric pressure), providing a virtually unlimited opportunity for dirt-laden air to enter the exciter. The PPV upgrade reduces the rate of air exchange and provides a hydrogen-free exciter GMS PPV delivering an ideal solution The BRUSH GMS PPV alleviates the problem of dirt ingress by providing manageable control of the make-up air and improved sealing of the various openings and penetrations into the housing zone. This results in a number of benefits: Both the diode wheel and bearing zones operate with positive pressure The fan zone is now the only area with negative pressure, so it s the only zone in which make-up air can enter.

9 This reduces the potential for air to enter the housing via the door, base and bulkhead interface seals by around 75% With the potential for air entering the system limited to the fan zone, it is now possible to control air quality, whilst also minimizing the volume of make-up air via use of a properly designed filtration unit and improved sealing. The make-up air enters the filter unit, passes through the pre-filter and primary filter and then through a pressure-actuated flow control valve, which uses static pressure in the diode wheel zone to maintain approximately 1-inch water gaugeImproved compressionAs well as changing the air intake locations, the BRUSH GMS PPV completely strips the existing rubber seals throughout the housing and installs new seals.

10 In addition, the doors are fitted with latches to provide greater seal compression, and all penetrations into the housing area are sealed as well. The housing is cleaned, re-assembled and then painted to match the existing As an effective means of reducing dirt ingress into the OEM s brushless exciters, the BRUSH GMS PPV offers the opportunity to reduce exciter maintenance and the risk of electrical failures arising from dirt accumulation on the electrical components. In addition, the PPV upgrade decreases the risk of hydrogen GMS PPV UPGRADEAt their power station in Centralia, Pennsylvania, USA, TransAlta initially requested a PPV upgrade on their No. 2 exciter, with highly beneficial results in air quality and considerable life extension to the unit.