This series transformer adopts DuPont NOMEX® insulation system which can well meet the railway department's performance requirements of safety and reliability, low loss, energy saving and environmental protection for station traction transformer.
Traction power supply is fundamentally different from standard power distribution; it requires uninterrupted, error-free operation under extreme conditions.
Challenge
Description
Challenge 1:
Power instantly surges during train start-up, acceleration, and climbing.
Challenge 2:
Power suddenly drops during braking and train meeting/passing, causing severe voltage fluctuations.
Challenge 3:
Impact currents introduce negative sequence components and harmonics, potentially interfering with signal systems.
Challenge 4:
Any weak link can become a hazard during extreme cold, intense heat, wind, rain, and lightning.
Long-term exposure to these conditions easily leads to mechanical fatigue, insulation aging, erosion from partial discharge, and environmental corrosion in standard transformers.
CEEG's Solution: Addressing Extreme Operating Conditions Across Four Dimensions—Electrical, Thermal Management, Longevity, and Energy Efficiency
1.
️ Unmatched Electrical & Mechanical Integrity
Covers Power Frequency Withstand Voltage and Lightning Impulse tests, ensuring long-term safety under high electrical stress.
Ampere-turn balance, zero radial clearance, and axial clamping ensure the core and coil assembly remains absolutely stable, even under sudden short-circuit impacts.
2.
️️ Extreme Thermal & Insulation Performance
DuPont Nomex® insulation system ensures long-term stable operation at 220°C, emergency temperature tolerance up to 350°C, and a service life of $\ge 30$ years.
Precise thermal stress cycle management through temperature control across seven key areas: insulation, fluid flow, core, and sealing.
Optimized heat dissipation design allows for long-term 30% overload and emergency 200% overload capacity.
3.
Superior Longevity & Environmental Resistance
From rounded-edge design to dust-free manufacturing processes, the factory Partial Discharge (PD) level is kept $<40 \ pC$.
Core and coil assembly is fixed with a non-lifting-core 3D positioning system to prevent shifting during transportation and long-term operation.
Triple sealing plus a special anti-rust coating ensures resistance against wind, rain, lightning, and salt fog for decades of reliable service.
4.
⚡ High Efficiency & Low Noise Design
The core utilizes highly permeable silicon steel, combined with automatic stacking and 45° step-lap joints, significantly reducing no-load loss and noise.
Types of Traction Transformers
1. 110kV and 220kV Single-Phase Traction Transformers: Used for AT (autotransformer) power supply and direct supply.
2. 110kV and 220kV Connection Traction Transformers: Used for AT power supply and direct supply.
3. 110kV and 220kV Balancing Traction Transformers: Used for direct supply.
4. Autotransformers: Used for AT power supply.
CEEG Traction Transformer Solution
Traction power supply is fundamentally different from standard power distribution; it requires uninterrupted, error-free operation under extreme conditions.
Challenge
Description
Challenge 1:
Power instantly surges during train start-up, acceleration, and climbing.
Challenge 2:
Power suddenly drops during braking and train meeting/passing, causing severe voltage fluctuations.
Challenge 3:
Impact currents introduce negative sequence components and harmonics, potentially interfering with signal systems.
Challenge 4:
Any weak link can become a hazard during extreme cold, intense heat, wind, rain, and lightning.
Long-term exposure to these conditions easily leads to mechanical fatigue, insulation aging, erosion from partial discharge, and environmental corrosion in standard transformers.
CEEG's Solution: Addressing Extreme Operating Conditions Across Four Dimensions—Electrical, Thermal Management, Longevity, and Energy Efficiency
1.
️ Unmatched Electrical & Mechanical Integrity
Covers Power Frequency Withstand Voltage and Lightning Impulse tests, ensuring long-term safety under high electrical stress.
Ampere-turn balance, zero radial clearance, and axial clamping ensure the core and coil assembly remains absolutely stable, even under sudden short-circuit impacts.
2.
️️ Extreme Thermal & Insulation Performance
DuPont Nomex® insulation system ensures long-term stable operation at 220°C, emergency temperature tolerance up to 350°C, and a service life of $\ge 30$ years.
Precise thermal stress cycle management through temperature control across seven key areas: insulation, fluid flow, core, and sealing.
Optimized heat dissipation design allows for long-term 30% overload and emergency 200% overload capacity.
3.
Superior Longevity & Environmental Resistance
From rounded-edge design to dust-free manufacturing processes, the factory Partial Discharge (PD) level is kept $<40 \ pC$.
Core and coil assembly is fixed with a non-lifting-core 3D positioning system to prevent shifting during transportation and long-term operation.
Triple sealing plus a special anti-rust coating ensures resistance against wind, rain, lightning, and salt fog for decades of reliable service.
4.
⚡ High Efficiency & Low Noise Design
The core utilizes highly permeable silicon steel, combined with automatic stacking and 45° step-lap joints, significantly reducing no-load loss and noise.
Types of Traction Transformers
1. 110kV and 220kV Single-Phase Traction Transformers: Used for AT (autotransformer) power supply and direct supply.
2. 110kV and 220kV Connection Traction Transformers: Used for AT power supply and direct supply.
3. 110kV and 220kV Balancing Traction Transformers: Used for direct supply.
