TRADE ENGINEERING. Solutions for Success. Products for the Mining Industry. Slip Ring Units

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1 TRADE ENGINEERING

2 We are dedicated to successfully applying our skills and knowledge to some of the mining industry's most daunting challenges. We have the ability to engineer components under very diverse scopes of work for both largescale and smallscale projects. The motors and generators powering mining equipment need specially treated brush grades to combat problems related to the harsh mining environments and severe operating loads. Our high performance brushes operate from subzero to >40oC ambient temperatures so they can operate from 2km above sea level to shift rocks from 4km deep underground. Field tests at customer sites have proved that our brushes give the best commutation, longest life and lowest commutator wear. We are the leading manufacturer of carbon brushes for the mining industry, helping to supply and power; businesses and homes with ores and fuel. We manufacture brushes for draglines, shovels, haul trucks, wheel motors, hoist or conveyors for open pit or underground mining applications which will provide you with the best performance and lowest total operating costs. To find out more about how our carbon brushes can be used in your mining project, contact us today. Page 1 from 5

3 Service & Expertise Trade Engineering Products for mining ensure optimum efficiency for a lot of application in the mining field: dumper trucks excavators conveyors shovels draglines loaders We work closely with the mining customers in all South Eastern Europe. Our philosophy is to offer our knowledge, technical support and high quality products to the mining operators, maintenance and repair specialists service for the optimal performance of mining equipment. Trade Engineering provide profiler and roughness device for diagnostics and repair services for motors and generators. Trade Engineering offer: measurement out of round for DC and AC Induction Motors carbon brush function and design analysis environment conditions analysis roughness measurement commutator/slip ring surface film formation analysis brush surface, shunts, connectors and contact surface analysis laboratory material analysis, identification and choice the right grade brush holder pressure measurement submission of expertise report including measurements protocols Page 2 from 5

4 We manufacture carbon brushes for mining sector motors and generators. They are designed to ensure excellent brush performance and high life time. High quality carbon brush grade for extremely difficult ambient conditions High quality carbon brush for extremely high load conditions. Good electrical and thermal conductivity, excellent film formation, improve the life time Carbon Brush Brush Holder for hoist motor. High quality carbon brush, perfect commutation abilities, good electrical and thermal conductivity, excellent film formation, improve the life time Page 3 from 5

5 Carbon and Brush holders for dumper trucks. High quality carbon brush low friction wear Carbon and Brush holders for sholves equipment. High quality carbon brush low friction wear Carbon and Brush holders for draglines machines. High quality carbon brush low friction wear Page 4 from 5

6 Grade Recommendation DC Motors Grade EG236 EG251 Opt. per. current density A/in 2 A/cm Max. Permanent speed m/s ft/s 196, Remarks High speed Electro graphite General grade Good commutating/film forming ability/high peak EG ,5 196,85 60 Excellent commutating abilities, operating over a wide range, difficult environmental conditions EG236S 77, ,85 60 General grade, good commutating abilities, standard grade for many OEM S, high performance operation SΑ General grade, good commutating abilities, standard for item with many OEM S SΑ35 131,23 40 Grade with intermediate commutating ability, Used on heavy duty machines where commutation is normal EG ,5 131,23 40 Good current collecting grade, perfect current sharing suitable for Generators and DC motors EGO 71 11,5 65,61 20 Electrographite with very low friction properties, suitable for the machines running very highly loaded, good current sharing, improve film formation AC Motors Max. Permanent speed m/s ft/s CM3H CM5H Opt. per. current density A/in 2 A/cm , CM5B High strength copper graphite with very good film formation, suited for induction motor slip ring CM1S Bronze graphite grade widely used for slip ring high load conditions, linear collection CM ,82 35 Universal grade for low load conditions, good film formation suitable for slip ring application CM Low content copper grade for high altitude operation Low temperature conditions and high humidity Grade Remarks Copper graphite grade for slip ring application Popular brush grade for medium slip ring application Page 5 from 5

7 TRADE ENGINEERING 10 Str. OHRID DIMITROVGRAD P.O. BOX: 6400, BULGARIA TELEPHONE: