CHH Power offers the 2.5 MVA dry-type transformer—an air-cooled solution engineered for efficiency, durability, and versatility in power distribution systems. Priced at USD 11,055.00 per set, this transformer combines compact design with low operational costs, making it suitable for industrial plants, commercial complexes, and grid step-down applications. Below is a detailed breakdown of its definition, core features, technical specifications, and CHH Power’s manufacturing standards.
1. Overview of CHH Power’s 2.5 MVA Dry-Type Transformer
CHH Power’s 2.5 MVA dry-type transformer is defined by its dry-core construction (stacked iron and copper cores leveraging ferromagnetic resonance principles) and air-based cooling system—eliminating the need for insulating oil used in traditional oil-immersed models.
Key Basic Parameters (CHH Power Standard Configuration)
- Rated Capacity: 2.5 MVA (medium-capacity series, ideal for medium-scale power distribution).
- Rated Voltage: Customizable to grid requirements (common configurations include 10kV/0.4kV; the original 400/500V specification is adjusted to align with standard industrial grid needs).
- Rated Current: Typically 144.3A (low-voltage side, based on 10kV/0.4kV ratio; tailored to specific voltage configurations).
- Application: Designed for three-phase AC power systems (10–40.5kV input), primarily used for step-down operations to supply low-voltage power to industrial machinery and commercial facilities.
Core Components
The transformer consists of three integrated parts, all manufactured under CHH Power’s strict quality control:
- Shell: A robust outer enclosure that protects internal components from dust and mechanical impact.
- Windings: Cylindrical coils formed by high-grade silicon steel sheets, wrapped with enameled copper wire (selected for low resistance and high thermal conductivity).
- Cooling System: Combines radiators and axial fans to ensure efficient heat dissipation, supporting stable operation under full load.
2. Core Features of CHH Power’s 2.5 MVA Dry-Type Transformer
CHH Power’s 2.5 MVA dry-type transformer stands out for seven key advantages, derived from optimized design and high-quality material selection:
(1) Compact Size & Light Weight
The stacked iron-copper core structure (ferromagnetic resonance design) reduces the transformer’s overall volume by 30% compared to oil-immersed reactors of the same capacity. Its lightweight construction (approximately 1,800kg) simplifies transportation and on-site installation, lowering logistics and infrastructure costs for clients.
(2) Low Energy Loss
Adopting air-cooling technology, the transformer achieves a 10% lower loss rate than traditional oil-immersed reactors. CHH Power enhances this efficiency by using low-loss grain-oriented silicon steel sheets for cores and high-purity oxygen-free copper for windings, minimizing both no-load and load losses. This translates to annual energy savings of up to 5,000 kWh for typical industrial users.
(3) Ultra-Low Operational Noise
Without an oil tank (a major noise source in oil-immersed models), the transformer’s noise level is reduced by 20% compared to oil-tank inductive reactors. CHH Power further optimizes noise control by balancing core lamination gaps and using vibration-damping materials in the base, keeping operational noise below 60dB—suitable for noise-sensitive environments like residential areas or hospitals.
(4) Extended Service Life
The tankless design eliminates risks of oil leakage and corrosion, while CHH Power’s selection of heat-resistant insulation materials (Class F, 155°C) ensures a service life of over 10 years. Routine maintenance checks confirm that 95% of CHH Power’s dry-type transformers retain 85% of their initial performance after a decade of operation.
(5) Wide Temperature Adaptability
Forced air convection cooling enables stable operation at ambient temperatures up to 40°C. CHH Power’s thermal design also includes a temperature margin, allowing the transformer to withstand short-term temperature spikes (up to 50°C) without performance degradation—ideal for hot and humid regions.
(6) Broad Frequency Compatibility
The transformer’s core and winding design support a wide range of input frequencies, making it compatible with global power systems (50Hz/60Hz) and specialized applications like variable-frequency drives (VFDs) in industrial settings.
(7) Minimal Maintenance Requirements
Without oil tanks or oil passages, the transformer requires no regular oil sampling or tank inspections. CHH Power recommends only annual dust cleaning of the windings and cooling fans, reducing maintenance workload by 70% compared to oil-immersed alternatives.
3. CHH Power’s Technical Requirements & Quality Control
To ensure reliability and safety, CHH Power adheres to strict technical standards for the 2.5 MVA dry-type transformer, covering materials, manufacturing, and assembly:
(1) Shell Specifications
- Material Selection:
- Outer and inner casings: Q235 steel (selected for high mechanical strength and cost-effectiveness).
- Inner casing to outer frame connections: 45# steel (enhances structural stability).
- Sealing rings: Heat-resistant rubber (105°C rating) to prevent dust ingress.
- Quality Standards:
- Surface finish: Smooth, uniform color, free of scratches or functional defects.
- Joints: Tightly sealed to IP20 protection standards (prevents 12.5mm+ solid object intrusion).
- Corrosion Resistance: Passes 48-hour salt spray testing to ensure durability in humid environments.
(2) Winding Installation
CHH Power follows a strict winding assembly sequence to optimize performance and safety:
- Layer Order: Primary winding first, followed by the secondary winding; high-voltage windings positioned before low-voltage windings.
- Precision Control: Uses CNC winding machines with ±0.1mm turn spacing accuracy to ensure uniform winding density, reducing local overheating risks.
- Insulation Testing: After installation, each winding undergoes a 1-minute dielectric strength test at 3kV to verify insulation integrity.
CHH Power’s 2.5 MVA dry-type transformer balances performance, cost, and ease of use, making it a reliable choice for medium-capacity power distribution. For custom voltage configurations, additional cooling options (e.g., forced air cooling upgrades), or detailed test reports, contact CHH Power’s technical sales team for personalized support.
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