Name: CGN Changgao Wind ParkLocation: Changgaoxiong, Beipiao City, Liaoning Province, China (click location link above to see where it is)Test Period: 2017-5 to 2018-2Tested Grade: Cu35MBrush size: 40 x 20 x 50 (6230-CG)Turbine Tested: Gamesa 2.0MW, No. 18Generator info: See below picture

”The test were made on a standard Gamesa slipring”

Estimated life time of power brush: 15 months

Carbex AB • PO Box 115 • SE-592 22 Vadstena • SwedenTel +46 (0)143-294 40 • VAT SE-556267-0413 • info@carbex.se • www.carbex.se

Carbex Brush Test for Gamesa 2.0 MW

Running data of Turbine NO. 18

Date of Installation 2017-05-08

Brush length Power Brush (mm)

50 50 50 50 50 50 Before Installation 50 50 50 50 50 50 50 50 50 50 50 50

31.84 31.9 32.00 33.00 33. 2 31.84 2018-01-24 32.00 34.00 32.00 31.84 32.5 33.42 35.5 32.9 31.7 33.2 33.7 35.5

Full Data

Date of Inspection Power Brush (mm) Days of test

50 50 50 50 50 50 2017-05-08 50 50 50 50 50 50 1 50 50 50 50 50 50 46.2 47.6 46.3 48.1 46.2 47.0 2017-07-27 47.9 46.5 46.8 45.9 47.3 46.6 99 46.4 46.3 46.9 47.2 47.7 46.8 39.2 40.1 39.5 42.3 41.1 38.9 2017-11-10 39.4 43.0 39.8 39.2 40.5 39.0 182 39.5 38.9 39.7 40.2 40.7 39.5 31.84 31.9 32.00 33.00 33.2 31.84 2018-01-24 32.00 34.00 32.00 31.84 32.5 33.42 254 35.5 32.9 31.7 33.2 33.7 35.5

Carbex AB • PO Box 115 • SE-592 22 Vadstena • SwedenTel +46 (0)143-294 40 • VAT SE-556267-0413 • info@carbex.se • www.carbex.se

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