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Dry-type power transformer is a kind of safety, environmental protection, energy-saving power transmission and transformation equipment without oil-immersed insulation structure, which adopts cast or wrapped insulation technology for core and windings. It is widely used in power distribution systems with high requirements for fire protection, safety and cleanness, undertaking the key tasks of voltage conversion, power distribution and stable power supply for various electrical equipment, and has become the preferred power transformation equipment for modern urban and industrial power supply.
I. Product Structure and Core Components
1. Core: Adopts high-quality cold-rolled grain-oriented silicon steel sheet with fully automatic laminated structure and strict annealing treatment. It features low no-load loss, low magnetic noise, high magnetic permeability and stable electromagnetic performance, which effectively reduces energy consumption during operation and ensures efficient power conversion.
2. Winding: Divided into epoxy resin cast winding and glass fiber wrapped winding, using high-purity oxygen-free copper conductor with excellent conductivity and small resistance loss. The insulation layer has high mechanical strength, strong short-circuit resistance, good heat dissipation and aging resistance, which can withstand impact load and voltage fluctuation.
3. Clamping Device: Made of high-strength steel with hot-dip galvanizing anti-corrosion treatment, the overall structure is firm and stable, with excellent seismic and anti-vibration performance, effectively fixing the core and winding to avoid mechanical deformation and ensure stable operation.
4. Temperature Monitoring and Protection System: Equipped with PT100 temperature sensors embedded in windings, matched with intelligent temperature controller, it can realize real-time monitoring, over-temperature alarm, automatic fan start and trip protection functions, effectively preventing insulation aging and equipment failure.
5. Protective Enclosure: Configured with enclosures of different protection grades (IP20/IP23/IP30/IP54), which have good dustproof, waterproof and anti-small animal intrusion effects, suitable for indoor and outdoor complex operating environments.
II. Core Performance Advantages
1. High Safety and Flame Retardancy: Adopts oil-free dry-type insulation structure, no flammable and explosive medium, with excellent flame retardant, fireproof and explosion-proof performance, no risk of oil leakage and fire, complying with strict safety standards for public places.
2. Environmental Protection and Pollution-Free: No insulating oil, no leakage, no pollution to soil and air, no need for special fire protection and oil storage facilities, in line with green environmental protection requirements, suitable for densely populated and environment-sensitive areas.
3. Low Loss and High Efficiency: Optimized electromagnetic design and low-loss core material greatly reduce no-load and load loss, with operating efficiency up to more than 98%, saving electric energy and reducing long-term operating costs.
4. Strong Environmental Adaptability: Excellent moisture-proof, dust-proof and anti-corrosion performance, can operate stably in high humidity, high dust and mild corrosive gas environment; strong anti-vibration and impact resistance, suitable for various harsh working conditions.
5. Maintenance-Free and Long Service Life: Simple structure, no need for regular oil replacement, insulation detection and other complex maintenance work, greatly reducing maintenance workload; durable insulation structure, long service life and high operation reliability.
6. Compact Structure and Flexible Installation: Small size, light weight, no need for special foundation and oil drainage device, can be installed indoors, on roof, in distribution room and other places, with flexible layout and low installation cost.
III. Scope of Application
This product is applicable to three-phase power distribution systems with rated frequency of 50Hz, rated voltage of 6kV/10kV/35kV, widely used in high-rise buildings, commercial complexes, hospitals, schools, data centers, airports, subway stations, industrial parks, mines, new energy power stations, residential areas and other places with high requirements for fire safety, environmental protection and reliable power supply.
IV. Core Technical Parameters
- Rated Capacity: 10kVA-2500kVA
- Rated Voltage: High-voltage side: 6kV, 10kV, 35kV; Low-voltage side: 0.4kV
- Insulation Class: F Class, H Class
- Cooling Mode: AN (Natural Air Cooling), AF (Forced Air Cooling)
- Protection Grade: IP20, IP23, IP30, IP54 (customizable)
- Ambient Operating Temperature: -30ºC~+45ºC
- Altitude: ≤2000m
- Impedance Voltage: 4%, 6%, 8% (customizable as required)
- Compliance Standards: IEC 60076, GB 1094, GB/T 10228
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