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CG677

Product catalog summary

Overview: The CG677 carbon brushes are designed to enhance wind generator performance by reducing operating temperatures, thereby increasing the lifespan of both brushes and slip rings. These brushes are suitable for high-load applications and can serve as a direct replacement in turbines with power output upgrades.

Key Advantages:

Low Voltage Drop: Ensures cooler operating temperatures.
Good Thermal Conductivity: Enhances heat dissipation, reducing slip ring temperatures.
Good Patina and Sliding Contact: Provides optimal performance on stainless steel and bronze rings.
High Thermal Stability: Prevents material expansion.
Low and Even Brush Wear: Ensures balanced current distribution, delaying brush wear.

Specifications:

Relative Density: 4
Resistivity: 20 μΩ.cm / 8 μΩ.in
Flexural Strength: 65 MPa / 9,500 PSI
Metal Content: 67%

Recommended Operating Conditions:

Current Density: 12-20 A/cm² / 75-130 A/inch²
Linear Speed: < 30 m/s / 6,000 fpm
Pressure on Carbon Brush: 18-25 kPa / 2.6-3.6 PSI

Recommendations for Optimized Operation:

Ensure functional ventilation systems for adapted cooling.
Optimize slip ring groove pitch.
Maintain slip ring surface conditions within specified roughness and run-out.

Additional Information: The CG677 grade has been tested under heavy loads and various climatic conditions. For further technical details, visit Mersen's website or request a data sheet.

Catalog excerpts

IMPROVED WIND GENERATOR PERFORMANCE THANKS TO LOWER RUNNING TEMPERATURES - Increased brush and slip ring life - Designed for high loads, up to 20 A/cm² (and higher) - Drop-in replacement for turbines with power output upgrade packages A UNIVERSAL / VERSATILE GRADE - Designed specifically for wind power applications in any climatic condition on stainless steel or bronze slip rings - Brushes field-tested successfully to last longer on all platforms even under heavy loads - 67 % metal content for high electrical conductivity - Silver-tamped connections, meaning improved performance during production peaks and added resistance suited to any climatic condition including extreme ones CARBON BRUSHES FOR WIND TURBINES CG677 advantages: ► Low voltage drop ▪ Cool operating temperature ► Good thermal conductivity ▪ Improved heat dissipation, which leads to lower slip ring temperatures ► Good patina and good sliding contact ▪ Optimum performance on both stainless steel and bronze rings ► High thermal stability ▪ No material expansion ► Low and even brush wear ▪ Balanced current distribution in all brushes, eliminating uneven brush wear and delaying

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Relative density: 4 Resistivity: 20 μΩ.cm / 8 μΩ.in Flexural strength: 65 МPa / 9,500 PSI Metal content: 67 % Recommended operating conditions*: ▪ Current density: 12-20 А/cm2 / 75-130 A/inch² ▪ Linear speed: < 30 m/seс / 6,000 fpm ▪ Pressure on carbon brush: 18-25 kPa / 2.6-3.6 PSI Current density: 16 A/cm² stainless steel Friction coefficient stainless steel Current density (A/cm²) * CG677 grade has proven itself under heavy operating loads and complete spectrum of climatic conditions. Recommended checks for optimized operation: ▪ adapted cooling – functional ventilation systems ▪ optimized...

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CG677

CG677

Catalog excerpts

All Mersen Power Transfer Technologies catalogs and technical brochures