2)Tools & devices for maintenance of electrical machines
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Preventive maintenance of slip rings and commutators Regular controls reduce the frequency of maintenance operations MAINTENANCE TOOLS & MEASURING DEVICES TOOLS & DEVICES FOR MAINTENANCE OF ELECTRICAL MACHINES

Measuring devices For over 120 years, Mersen has been developing carbon brush grades and manufacturing carbon brushes for electrical machines. Our expertise of motors and our experience of industrial maintenance enables us to offer you a global range of solutions adapted to your requirements: • Brush-holders, carbon brushes and slip rings • A team specialized in on site motor technical assistance (in-situ machining operations) • A whole range of tools selected for maintenance of slip rings and commutators • A Customer Technical Assistance Service • Training in maintenance of electrical...

Measuring devices DYNAMOMETER Carbon brush pressure determines electrical and mechanical losses, commutation quality, current distribution between the carbon brushes, brush and commutator wear, and therefore influences the machine’s whole performance. It is important to make periodic pressure measurements on the brush-holder springs and to check spring pressure between brushes of the same polarity on commutators and between brushes on the same slip ring. Pressure differences cause unequal current distribution and therefore unequal brush wear, increasing the frequency of maintenance...

Tools for maintenance of electrical machines GRINDING STONES The commutator or the slip rings of an electrical machine must have a proper roughness to give the carbon brushes an adequate seating base and enable them to ensure a good current transmission. To achieve this proper roughness, the commutator or the slip ring has to be «ground» after machining with a medium grinding stone such as P/N 90623N. If you wish to work without dismantling the machine, rather use a grinding stone with a handle. P/N 90602N is ideal for motors up to 15 kW, while P/N 90651N is suitable for motors up to 150...

Tools for maintenance of electrical machines Straight-handle grinding stones (two different grades) Reference 90601N 90602N 90603N Straight-handle grinding stone Pencil-type grinding stones Reference 90604N 90606N 90605N Commutator polisher with curved plastic handle Pencil-type grinding stone Brush seaters Meant for seating carbon brushes, this material does not wear metal much. It must not be used intensively, unless with a dust collection device. Commutator polisher Brush seater Grain M (Medium) M H (Hard/Dur) M H H M S (Tendre/Soft) S S Slotting files Files designed to chamfer bar...

Tools for maintenance of electrical machines PORTABLE MICA UNDERCUTTER Portable mica undercutter Portable mica undercutter • Compressed air angle grinder, with built-in sound-insulating features and adjustable air outlet. Very handy with depth adjustment and protective cap for offhand grinding up to 60 N. Supplied with a spanner set. • Power: 75 W • Weight: 180 g • Couplings: R 1/8 • Air consumption: 0.2 m3/min • No-load speed: 70,000 rpm • Supplied without air pack nor connector piece • Used cutters: Diameter 19 mm and diameter 22 mm diamond discs Reference 90570N Description Mica...

Tools for maintenance of electrical machines TOOLING KITS Maintenance kit This kit includes a selection of tools meant for maintenance and repair specialists in charge of slip rings, commutators and carbon brushes. Description Complete kit including following tools: Insulating probe Facom LED lamp Set of gauges Graduated rule Slotter Commutator polisher with curved plastic handle Brush seater Maintenance tool case It includes a set of grinding stones and slotters for the preparation of all types of commutators and slip rings. Maintenance tool case Description Complete carrying case...

Mersen Services, servicing your electrical rotating machinery For any technical expertise, maintenance or training, Mersen experts offer their extensive knowledge, years of experience and global reach, linked with a reactive proximity service. On-site service calls throughout the world Commutation expertise Measurements and diagnostics Support services on a daily basis Phone technical assistance Technical literature on line of our site www.mersen.com or on request (infos.amiens@mersen.com) Mersen provides training courses for maintenance of electric motors. For over 25 years, more than...