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Mastering Carbon Brushes in Electrical Machines

Strates

This STAGELEC 2‑day technical training helps you quickly build a strong understanding of how carbon brushes work and the essential operational parameters that drive performance in electrical machines. 

You will learn how to carry out reliable technical diagnostics based on brushes operation, so you can implement predictive, effective maintenance strategies and reduce the direct costs of corrective maintenance. 

Practical Organization

The session in English takes place at Mersen France Amiens (10 Avenue Roger Dumoulin, 80084 AMIENS) and is limited to 8 participants to ensure hands‑on learning and expert interaction. 
Dates: May 19–20, 2026. Please note that dates may be adjusted depending on the total number of participants. 
Part of the training includes workshop sessions. Safety shoes are required (not provided) and safety goggles are provided. 

*Mandatory field

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Training program

Part 1

Fundamentals of carbon brushes

Understand electrical machine basics and the role of carbon brushes and explore brush grades, design, and key specifics for DC machines and slip ring machines. 

Electrical machines

  • Principle of DC motor.
  • Function of the brush.
  • The brush in electrical rotating machines.

Brush grades

  • Families of grades, their characteristics and manufacturing methods*.

Brush design

  • Different shapes, roles of components, manufacturing*.

Specific characteristics:

  • DC machines: Commutation, neutral line, brush design.
  • Slip ring machines: design (thermal), helical grooves.
Mersen Carbon brush

Part 2

Essential operating parameters

Learn the parameters that are critical to correct brush operation: 

  • patina formation,
  • electrical and mechanical parameters,
  • environmental influences with practical remedies.
people during a training sessions at Mersen France Amiens

Part 3

Diagnostic and maintenance

  1. Analyze machine operation through the behavior of brushes and slip rings/commutators
    • Interpret patinas and rubbing surfaces.
       
  2. Use diagnostic tools
    • Recommendations for maintenance of commutators, rings, brushes, and brush‑holders
       
  3. DC Machine
    • Neutral line control, role of the different poles, effects of malfunctions on brushes. 
mersen carbon brushes in operation
What you will gain
Practical skills you can apply immediately

This training is delivered by experienced Mersen experts and combines technical fundamentals with real‑world workshop practice, ensuring practical and immediately applicable learning. 

We designed it for maintenance operators and technicians, as well as design engineers who want to improve machine reliability and optimize maintenance costs with robust diagnostics.

safety

Apply methods and tools during workshop sessions in our facilities.

Training
expertise

Build a clear understanding of carbon brush function, grades, and design in electrical machines.

Mersen Carbon brush
graph

Learn how to interpret brush behavior and rubbing surfaces to identify issues early.

mersen carbon brushes in operation
money

Implement more predictive, efficient maintenance strategies and reduce corrective maintenance costs.

people during a training sessions at Mersen France Amiens
Product
62003J

Fuse Block 600VAC 600VDC Class J 200A 3-Pole Box Side-Clip

Product line
Class J Fuseholders - Class J

Mersen’s connectors fit a wide range of stranded or solid copper
or aluminum conductors. Insulators are either molded glass-filled
polycarbonate (GFPC) or phenolic with verified dielectric strength
in excess of 2500V. All fuse clips are made of high conductivity tinplated
copper designed specifically for 200-600A bladed Class J
fuses.

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