Generators and alternator carbon brush

turbogenerator

Short Description
Carbon brush blocks and matched brush holder components designed for hydrogen-cooled turbine generators. Engineered for direct replacement in large generators, they provide stable excitation current transmission and reduced maintenance downtime under high-speed, high-current conditions.

Product Detail
We supply carbon brush assemblies and complementary holder parts dedicated to large hydrogen-cooled turbine generators used in power plants. Components are manufactured to precise dimensions, tested for electrical resistivity, contact voltage drop and wear, and validated for reliable operation in harsh industrial environments.

Applicable Equipment & Basic Generator Operating Parameters
Parameter Item — Specification
Generator Type — TFLQQ
Structure Form — KD
Number of Phases — 3
Number of Poles — 2
Rated Capacity — 245,800 kVA
Output Power — 221,220 kW
Rated Speed — 3,000 rpm
Rated Frequency — 50 Hz
Rated Voltage — 16,000 V
Rated Current — 8,870 A
Exciting Voltage — 440 V
Field Current — 2,760 A
Cooling Mode — Hydrogen-cooled (Hydrogen Pressure: 210 kpag)
Insulation Class — F
Ambient Operating Temperature — 45°C
Armature Temperature Rise — 55 °C
Field Winding Temperature Rise — 65 °C
Execution Standard — ANSI C50.13 (1977)

Complete Product Dimensions & Matching Components
Parts Name — Width (mm) — Thickness (mm) — Height (mm) — Additional Remarks
Brush Box — 159 — 84 — 143 — Standard matching part
Brush Support — 90 — 32 — 192 — Standard matching part
Carbon Brush — 25.4 — 38.1 — 102 — Wear limit remaining length: 45 mm

Core Compatibility & Replacement Advantage
The carbon brush and holder components are designed as drop-in replacements for mainstream industry equivalents. After professional testing, resistivity, contact voltage drop and wear performance meet or exceed original parts. Maintenance teams can replace components without structural modifications, minimizing on-site downtime and simplifying spare parts logistics.

Key Product Performance Features & On-site Working Value

• Low contact resistance and reduced voltage drop to limit energy loss and ensure stable excitation current transmission.
• Enhanced wear resistance for extended service life under 3,000 rpm and high field current conditions, reducing replacement frequency.
• High vibration resistance to maintain continuous electrical contact and minimize sparking and premature failures.
• Precision machining to original equipment dimensions for plug-and-play assembly and reliable fit.

Application Scenarios & Service Orientation
Suitable for large hydrogen-cooled turbine generators in thermal power plants and other power generation facilities. Applicable to new units and legacy equipment; supplied as supporting spare parts for long-cycle, stable and efficient generator operation.

Technical Specifications

• Product type: Carbon brush blocks and matched brush holder components for large hydrogen-cooled turbine generators.
• Rated operating speed: 3,000 rpm.
• Rated field current: 2,760 A.
• Rated current (generator): 8,870 A.
• Rated voltage (generator): 16,000 V.
• Exciting voltage: 440 V.
• Rated capacity: 245,800 kVA; Output power: 221,220 kW.
• Cooling mode: Hydrogen-cooled (Hydrogen Pressure: 210 kpag).
• Insulation class: F.
• Ambient operating temperature: 45°C.
• Armature temperature rise: 55 °C; Field winding temperature rise: 65 °C.
• Execution standard: ANSI C50.13 (1977).
• Brush Box dimensions (W×T×H): 159 × 84 × 143 mm (standard matching part).
• Brush Support dimensions (W×T×H): 90 × 32 × 192 mm (standard matching part).
• Carbon Brush dimensions (W×T×H): 25.4 × 38.1 × 102 mm; Wear limit remaining length: 45 mm.
• Key material/performance attributes: low contact resistance, low voltage drop, superior wear resistance, strong vibration resistance, high dimensional precision.