In modern power systems, dry-type transformers are increasingly becoming the core equipment in substations, commercial buildings, industrial plants, and renewable energy projects, thanks to their outstanding safety and environmental performance. As a professional power solution provider, Xinhong Electrical is committed to delivering high-performance, highly reliable dry-type transformers. This article explains in detail the main roles of dry-type transformers in power systems.
The most fundamental role of a dry-type transformer is voltage conversion – stepping down high voltage to low voltage suitable for end-use equipment, or stepping up voltage for efficient transmission. Unlike traditional oil-immersed transformers, dry-type transformers use solid insulation materials such as epoxy resin, eliminating the need for insulating oil. This gives them significant advantages in:
Fire‑sensitive locations – high‑rise buildings, hospitals, shopping malls, underground facilities, etc. Dry‑type transformers have no oil leakage risk and will not cause fire or explosion.
Environmentally strict areas – oil‑free, pollution‑free, making them ideal for indoor or densely populated areas.
Xinhong Electrical designs its dry‑type transformers in strict accordance with international standards (e.g., IEC, ISO), offering high insulation levels and self‑extinguishing properties, providing users with the highest safety protection.
Energy losses in power systems mainly come from no‑load losses and load losses in transformers. By using high‑quality silicon steel or amorphous alloy cores, high‑conductivity winding materials (copper or aluminum), and optimized electromagnetic design, Xinhong Electrical dry‑type transformers keep losses to a minimum.
Low no‑load loss – excellent core material with small hysteresis and eddy current losses.
Low load loss – low winding resistance and well‑controlled temperature rise.
Our dry‑type transformer series meets leading energy efficiency standards (e.g., GB 20052‑2020 Tier 1/Tier 2), helping customers significantly reduce long‑term operating costs and achieve green, low‑carbon goals.
Power systems often face challenges such as humidity, dust, chemical corrosion, or severe temperature variations. The solid insulation construction of dry‑type transformers provides excellent short‑circuit withstand capability and environmental adaptability.
Strong moisture resistance – insulation resistance remains stable even under high humidity.
Pollution and salt‑fog resistance – special protective coating applied to the surface, suitable for coastal or industrial polluted areas.
High overload capacity – Class H (180°C) or higher insulation system allows short‑term overload without affecting service life.
Thanks to these advantages, Xinhong Electrical dry‑type transformers are widely used in rail transit, data centers, offshore wind power platforms, and other applications demanding extremely high power supply reliability.
Traditional oil‑immersed transformers require regular oil testing, oil replenishment, leak treatment, etc. – a heavy maintenance workload. In contrast, dry‑type transformers are virtually maintenance‑free:
No oil sampling or filtration needed.
No leakage risk, no need for oil containment pits or firewalls.
Can be directly equipped with temperature controllers and fans for automatic forced‑air cooling.
Xinhong Electrical equips its dry‑type transformers with intelligent monitoring systems that can measure winding temperature, load factor, partial discharge, and other parameters in real time. These can be connected to power automation systems via RS485 or wireless modules, greatly reducing operation and maintenance costs.
With large‑scale deployment of solar, wind, and other renewable energy sources, power systems demand greater flexibility and reliability from transformers. Dry‑type transformers are compact, lightweight, and easy to integrate – ideal for:
Step‑up after PV inverters – raising low‑voltage AC to 10kV or 35kV for grid connection.
Battery energy storage systems (BESS) – voltage matching for bidirectional power flow.
Microgrids and EV chargers – fast response to load changes and low noise operation.
Xinhong Electrical has developed dedicated dry‑type transformers for the new energy sector, featuring high impedance, low harmonic losses, and thermal shock resistance. They have been successfully deployed in multiple megawatt‑scale PV power plants and energy storage projects.
From urban distribution networks to industrial power systems, from green buildings to renewable energy plants, dry‑type transformers have become indispensable key equipment in modern power systems, thanks to their comprehensive advantages of safety, efficiency, environmental friendliness, and low maintenance. Xinhong Electrical has many years of experience in transformer manufacturing, with a complete design, testing, and intelligent production system. We offer a full range of dry‑type transformers from 30kVA to 10MVA, with voltage ratings up to 35kV. For technical inquiries or customized solutions, please visit our official website or contact our sales team.
Xinhong Electrical – Your reliable power partner, delivering safety and efficiency to the world.
