125kVA 11kV Industrial Dry Power Transformer for Power Distribution System

1. Product Overview

2. Standard Product Specifications

3. Core Product Features & Advantages

• High-Strength All-Copper Coil Structure: Both HV and LV coils adopt full copper conductors reinforced by glass fiber. After high vacuum drying and epoxy resin integral casting and curing, the coils form an integrated firm cylinder structure. It boasts excellent mechanical strength, strong short-circuit resistance, extremely low partial discharge, high operational reliability and ultra-long service life, effectively avoiding coil deformation and damage caused by sudden current impact.
• Flameproof, Explosion-Proof & Zero Pollution: Equipped with imported composite insulation materials of epoxy resin and glass fiber, and doped with high-efficiency silicon powder. Compared with traditional glass fiber epoxy transformers, it has greatly improved thermal conductivity and flame retardancy. No toxic gas or harmful substances are released under high-temperature operation, achieving environmental-friendly and safe operation with no pollution.
• Moisture-Proof & Severe Environment Adaptability: The cast coil structure completely prevents moisture absorption, avoiding insulation failure caused by humid environment. The iron core clamp is coated with special anti-corrosion coating, which can operate stably in humid, dusty and other severe working conditions. No regular moisture removal treatment is required for intermittent operation, reducing daily maintenance workload.
• Strong Overload & Impact Resistance: Optimized internal structure design endows the transformer with excellent short-circuit resistance and high lightning impulse resistance, effectively resisting grid voltage fluctuation and sudden short-circuit faults. The optional fan cooling (AF) system can significantly improve short-time overload capacity and ensure stable and safe operation under peak load.
• Efficient Heat Dissipation & Low Energy Consumption: The coil surface is coated with thin-layer high-heat-conduction resin, which accelerates heat dissipation. The standard natural air cooling (AN) mode meets daily operation needs, with low no-load loss and load loss. It features low operating noise, significant power-saving effect and economical long-term operation.
• Small Size & Low Installation Cost: Compact overall structure, small volume, light weight and small floor area. Unlike oil-immersed transformers, it does not need oil storage pools, fireproof partition walls and special fire-fighting facilities, saving civil engineering investment and site cost.
• High Safety & Flexible Installation: Zero fire and explosion risk, eliminating potential safety hazards of oil leakage and combustion. It can be installed centrally in distribution rooms or dispersedly near load centers and power consumption points, effectively reducing low-voltage wiring distance, lowering cable engineering cost and improving power supply efficiency.
• Maintenance-Free Operation: Stable material performance and integrated sealing structure avoid daily oil replacement, cleaning and other maintenance work, greatly reducing later operation and maintenance costs.

4. Ordering Technical Notes

1. Transformer model type
2. Rated capacity (fixed 125KVA for this model)
3. Phase number and rated frequency
4. High voltage and low voltage rated voltage level (10KV/10.5KV/11KV optional)
5. Vector group
6. Short-circuit impedance value
7. Cooling mode (AN natural cooling / AF forced air cooling)
8. Temperature control & indication device (with/without computer communication interface)
9. Protection level, enclosure material and customized color
10. Service conditions: altitude, ambient temperature, humidity and other environmental parameters
11. Order quantity and required delivery time

5. Frequently Asked Questions (FAQ)

Q1: What voltage levels does this 125KVA dry transformer support?

Q2: What is the difference between AN and AF cooling modes?

Q3: Can this 11KV dry transformer work in humid and dusty environments?

Q4: Is this dry type transformer fireproof and explosion-proof?

Q5: Does the 125KVA dry transformer require daily maintenance?

Q6: Where can this 11KV dry power transformer be installed?

Q7: What are the core advantages of full copper coil dry transformer?