Whatsapp
Lugao Power is a leading transformer manufacturer with ISO9001 & SGS certifications, specializing in reliable dry-type and oil-immersed transformers for global markets since 2005. Quality and innovation drive us.
ISO9001 & SGS-certified manufacturer of dry-type transformers and oil-immersed transformers, delivering reliable power solutions for industrial, urban, and critical infrastructure projects worldwide.
Lugao Power Co., Ltd. is a professional China power transformer manufacturer and supplier, specializing in the design, manufacturing, and testing of high-performance power transformers for transmission and distribution systems worldwide.
At the core of every stable power system is a reliable power transformer. Its performance directly affects grid safety, operational continuity, and long-term efficiency. That’s why every Lugao power transformer, including oil-immersed power transformers and dry type power transformers, is designed and validated under strict CCC and CE standards from the very first engineering stage.
Every unit leaving our factory is authoritatively certified by national testing organizations, delivering proven reliability you can trust.
True reliability is demonstrated through testing, not claims. All Lugao power transformer models undergo rigorous verification at the National Electrical Products Quality Supervision and Inspection Center.
Short-circuit faults represent the most severe mechanical stress a power transformer can face. Lugao Power conducts repeated impulse and short-circuit simulations to ensure structural integrity under worst-case scenarios.
Average temperature values don’t reveal insulation aging risk — hot-spot temperature does.
Every Lugao power transformer is tested to withstand the full voltage spectrum, including extreme events
Power-frequency withstand tests
Impulse voltage tests
Lightning impulse tests up to 200kV (35kV class transformers)
These tests ensure reliability during switching surges, grid disturbances, and lightning strikes.
Before shipment, each Lugao power transformer undergoes precision verification
Meeting GB and IEC standards is only the baseline. For special projects, Lugao Power offers advanced testing such as:
● No-load harmonic analysis (power quality evaluation)
● Zero-sequence impedance testing (protection coordination)
● Tank strength testing for oil-immersed power transformers
● Structural integrity testing for dry type transformer enclosures
Choosing Lugao Power means choosing a complete, fully tested power transformer solution.
Our power transformers are widely used in:
● Power grids & substations
● Industrial facilities
● Infrastructure projects
● Renewable energy systems (including solar farms)
They are trusted globally for high reliability, low losses, and verified safety.
● Operating successfully in Central Asia, Africa, and global markets
● 100+ power transformers exported annually
● Minimum order quantity: 1 unit
● Fast delivery — as short as 2 weeks for select models
● Distribution transformers available from stock
What is a power transformer?
+
-
A power transformer is an electrical device used to increase or decrease voltage levels in transmission and distribution systems, ensuring efficient and safe power transfer across the grid.
Is a power transformer AC or DC?
+
-
Power transformers operate on alternating current (AC). They do not work with direct current (DC) because electromagnetic induction requires changing current.
What is the main purpose of a power transformer?
+
-
The main purpose of a power transformer is to transfer electrical energy between circuits while changing voltage levels, reducing transmission losses and improving grid efficiency.
Where do we use a power transformer?
+
-
Power transformers are commonly used in power plants, substations, transmission networks, industrial facilities, renewable energy systems, and utility grids.
How does a power transformer work?
+
-
A power transformer works by electromagnetic induction, transferring energy between primary and secondary windings through a magnetic core to adjust voltage levels.
Can a power transformer increase voltage?
+
-
Yes, a power transformer can increase voltage (step-up) or decrease voltage (step-down) depending on the winding design and application requirements.
What is the lifespan of a power transformer?
+
-
A well-designed and properly maintained power transformer typically has a service life of 25 to 40 years, depending on load conditions and operating environment.
What is the 80% rule for transformers?
+
-
The 80% rule recommends operating a transformer at no more than 80% of its rated capacity to enhance efficiency, reduce heat stress, and extend service life.
What are the different types of power transformers?
+
-
Common types of power transformers include:
● Oil-immersed power transformers
● Dry type power transformers
● Autotransformers
● Step-up and step-down transformers
What is the most common cause of power transformer failure?
+
-
The most common causes include insulation aging, overheating, overloading, moisture ingress, and short-circuit stresses.
Lugao Box-Type Transformer Substations are designed with high dielectric performance to withstand real-world grid conditions:
● Power frequency withstand: 42 kV for 1 minute
● Lightning impulse withstand: 75 kV on HV side
These thresholds are tested and validated to meet or exceed American Type Substation and European Type Substation requirements. This ensures a durable dielectric foundation that protects internal components for the long term.
We prioritize thermal efficiency and transformer longevity:
● HV winding temperature rise: ~45.1 K
● LV winding temperature rise: ~52.9 K
The enclosure is engineered to prevent localized hotspots, directly improving insulation life and reducing maintenance costs. Thermal resilience is designed for both standalone American Type substations and European Type prefabricated installations.
Lugao substations are built to endure environmental and physical challenges:
● IP44 protection against dust and water ingress
● Structural strength to withstand accidental impacts
● Suitable for open-yard American Type Substations or European Type Substations integrated into buildings
This ensures a safe, long-lasting installation in any project environment.
Our substations are rigorously tested for fault-current scenarios:
● Example rating: 20 kA RMS on HV side
● Post-test inspections confirm busbar integrity and no deformation
These validated results provide tangible assurance of internal ruggedness, meeting fault-current requirements in both American and European grid standards.
Noise reduction is a key feature:
● Operational sound pressure: ~41.6 dB(A)
● Suitable for community-sensitive locations
Ideal for European Type compact substations or urban American Type installations
Designed for safe operation and easy maintenance:
● Mechanical interlocks to prevent mishaps
● Accessible earthing points
● Stable control circuits across realistic voltage ranges
These features reflect professional-grade engineering and enhance the long-term reliability of your Box-Type Transformer Substation.
Lugao substations meet international and national standards:
● GB/T 17467-2020
● CE mark for EMC compliance
This ensures compliance with European Type Substation requirements while reflecting the robust quality standards of American Type Substations.
What is a box-type transformer substation?
+
-
A Box-Type Transformer Substation is a compact, preassembled unit that houses transformers, switchgear, and protective devices for power distribution. It is designed for both indoor and outdoor use, providing safe and efficient electricity management.
What are the differences between American and European type substations?
+
-
American type substations are typically outdoor, robust, and modular. European type substations are prefabricated, compact, and suitable for both indoor and outdoor installations with a fully sealed design.
What voltage and current ratings are available for Lugao substations?
+
-
Lugao offers customized voltage and current ratings, including high-voltage (HV) and low-voltage (LV) options, to meet specific project requirements worldwide.
Are Lugao box-type transformer substations certified?
+
-
Yes, all Lugao substations comply with GB/T 17467-2020, CE, and ISO standards, ensuring international reliability and safety compliance.
Can these substations withstand short-circuit conditions?
+
-
Yes, all Lugao substations are tested for short-circuit withstand, such as 20 kA RMS on the HV side, with post-test inspections confirming no deformation or internal damage.
How quiet are Lugao Box-Type Transformer Substations?
+
-
The operational noise is approximately 41.6 dB(A), making them suitable for urban environments, community-sensitive areas, and locations requiring low-noise operation.
What is the minimum order quantity?
+
-
The minimum order quantity is one unit, with fast delivery and professional export packaging available for international customers.
How does Lugao ensure long-term reliability?
+
-
Through rigorous insulation tests, thermal management, mechanical strength, and short-circuit validation, ensuring each substation performs reliably in real-world conditions.
Can these substations be customized?
+
-
Yes, Lugao provides OEM and wholesale options, allowing customers to customize voltage, capacity, and layout to suit project-specific requirements.
Our switchgear integrates multiple components into a single compact cabinet, saving floor space and enabling quick installation and deployment.
● Vacuum circuit breakers for rapid tripping and short-circuit interruption.
● Microprocessor-based protection devices and fuses to prevent overloads.
● Multi-layered protection ensures operator safety against misoperations.
● Cabinets are equipped with processors for real-time monitoring.
● Supports remote operation, enabling easy management and diagnostics.
● Modular design for simplified maintenance.
● Reduced downtime and lower maintenance costs thanks to quick repairs.
● Over 20 years of manufacturing experience.
● Products certified by CE, ISO, and SGS.
● Type-tested for performance, durability, and safety.
Reliable power distribution for manufacturing, chemical, metallurgical, and mining industries.
Shopping malls, offices, and business districts requiring safe, compact, and EMC-compliant switchgear.
Low-noise ( <45dB) units suitable for residential areas, hospitals, and schools.
For grid expansion, renovation projects, and temporary or permanent substations.
Ideal for railway, municipal, and public infrastructure requiring high reliability.
CE-certified and widely supplied to Africa, Southeast Asia, the Middle East, Central Asia, and Europe.
What types of switchgear does Lugao manufacture?
+
-
Lugao produces low-voltage, medium-voltage, and high-voltage switchgear, including GCK, GGD, MNS, KYN, XGN, and SF6 gas-insulated RMUs.
Are Lugao switchgear products CE and ISO certified?
+
-
Yes, all switchgear products are CE certified, ISO 9001 compliant, and meet international standards for safety, performance, and EMC compliance.
Can Lugao provide OEM customization for switchgear?
+
-
Absolutely. Lugao offers custom solutions, including capacity adjustments, enclosure designs, internal layouts, and auxiliary systems to meet unique project requirements.
What is the typical lead time for delivery?
+
-
With advanced production lines and ample inventory, standard switchgear can be delivered within weeks, and customized units are delivered per project schedules.
Where can Lugao switchgear be used?
+
-
Lugao switchgear is suitable for industrial, commercial, residential, infrastructure, and international export projects, ensuring safe, reliable, and long-lasting power distribution.
We specialize in power transformers, Switchgear, and Box-Type Transformer Substation equipment products, which are exported to more than 30 countries, serving thousands of industries and sectors.
Core Business:Lugao has its own factory, which was established in 2016, specializing in the research, development, production and sales of high-voltage and medium-voltage power transmission and distribution equipment.
Main products:the core products are dry-type transformers and oil-immersed transformers, which are known for their high performance and safety.
Applications:metallurgy, chemical industry, mining, railroad, construction and residential communities.
Quality Assurance:With many authoritative international certificates, including ISO9001 and SGS quality management system certificates, as well as CCC and CE certificates for transformer products, it is fully proved that it meets the strict safety and quality standards.
Lugao has its own brand, chasing through a one-stop solution in power transformer design and manufacturing. Since its establishment in 2016, Lugao Power has always been focusing on the field of power equipment and has rapidly developed into a specialized manufacturer of dry-type transformers and oil-immersed transformers for important power infrastructure projects around the world.
Lugao specializes in the design, manufacture and delivery of high-performance power transformers to meet the diverse needs of the global power infrastructure. From initial consultation to final installation, we provide end-to-end services to ensure that every transformer meets international standards and provides our customers with reliable and stable power transmission.
Tailor-made systems to meet your specific production needs.
On-site installation and testing to ensure safe and smooth operation.
24/7 round-the-clock support, regular inspections and rapid troubleshooting.
Comprehensive training and expert advice to enhance your team's capabilities.
Fast access to critical components ensures your system stays up and running.
What are dry type transformers?
Why do we use a dry type transformer?
Where are dry type transformers commonly used?
What is the main advantage of dry type transformers over liquid-filled transformers?
How long do dry type transformers last?
Can dry type transformers be used outside?
Do dry transformers require a special enclosure?
What should dry type transformers installed outdoors have?
Are dry transformers more fire-resistant?
Do dry type transformers have PCBs?
