Three Phase Cast Resin Dry-type Distribution Transformer

Three Phase Cast Resin Dry-type Distribution Transformer

Superior Power Distribution for Modern Infrastructure

At Xuzhou Tuojie International Trade Co., Ltd., our Three Phase Cast Resin Dry-type Distribution Transformer delivers enterprise-level power solutions with exceptional safety and reliability. Featuring advanced epoxy resin encapsulation technology, our transformers operate across rated capacities from 30KVA to 31,500KVA with efficiency levels reaching 98.5-99.2%. Our manufacturing capabilities include over 120 sets of specialized equipment—CNC static vacuum casting machines and microcomputer-controlled gradient curing furnaces—ensuring consistent quality. We've finished hundreds of important projects, such as the Xuzhou Rail Transit Network Control Centre and XCMG Group plant upgrades, and have 18 patents and ISO9001 certification to show for it. They can work in temperatures from -40°C to +40°C and make less than 55dB of noise, which makes them perfect for places where fire safety and small size are important.

Understanding This Advanced Power Solution

This transformer technology uses vacuum-cast epoxy resin to encapsulate copper or aluminum windings. The process creates solid insulation that eliminates oil-based cooling systems entirely.

You get a power distribution device that steps down high voltage (10kV to 35kV primary) to usable levels (0.22kV to 1.14kV secondary). The cast resin construction provides superior moisture resistance and mechanical strength.

The design addresses your critical concerns: fire safety in populated areas, zero environmental contamination risk, and reduced maintenance requirements. You can install these units directly at load centers without fire suppression systems.

Our transformers comply with IEC60076, ANSI, IEEE, and GB standards. They're perfect for indoor installations where space is limited and safety regulations are stringent.

Technical Specifications

Why Choose Our Solution?

Exceptional Moisture Resistance

Your transformer operates normally at 100% humidity. After shutdown, you can restart immediately without pre-drying procedures. This saves valuable downtime.

Maximum Safety Standards

Non-flammable and fire-resistant construction means zero fire risk. You can install units directly at your load center without additional fire protection infrastructure. This reduces installation costs significantly.

Superior Performance Characteristics

Low losses and minimal partial discharge keep your energy costs down. Noise levels stay below 55dB, making installation in occupied buildings practical.

You'll benefit from excellent heat dissipation capabilities. Under forced-air cooling conditions, operation at 150% rated load is achievable during peak demand periods.

Maintenance-Free Operation

Installation is straightforward. Your overall operating costs remain low throughout the 25-30 year lifespan. No routine oil testing, no leak repairs, no environmental compliance issues.

Advanced Monitoring Technology

BWDK thermometer monitors all coil phases continuously. You get overheat alarms and automatic trip protection. Full temperature protection ensures safe operation under all load conditions.

Real-World Applications

Underground Infrastructure

In subway systems and tunnels, fire safety is non-negotiable. Our transformers power lighting, ventilation, and signaling systems in confined spaces where traditional oil-filled units pose unacceptable risks.

The sealed resin construction prevents moisture ingress during 24/7 operation. You maintain reliable service in high-humidity underground environments without special ventilation requirements.

Industrial Manufacturing

Pharmaceutical and chemical facilities require clean power delivery. The absence of oil eliminates contamination risks from leaks. You meet stringent cleanroom requirements while maintaining stable voltage regulation within ±2%.

Complex loads including variable frequency drives and precision instrumentation receive consistent power quality. Your sensitive production equipment operates reliably without voltage fluctuations.

Renewable Energy Installations

Wind farms and solar power plants operate in extreme conditions. Our Three Phase Cast Resin Dry-type Distribution Transformer units withstand temperature variations from -40°C to +50°C and high-altitude locations up to 4000 meters.

The cast resin construction handles thermal cycling from variable renewable output. Salt spray corrosion resistance ensures reliable coastal operation. You maintain efficiency levels above 98% throughout the operational life.

Commercial Real Estate

Office buildings, shopping centers, and residential complexes benefit from compact design. The 30-40% smaller footprint compared to oil-filled units saves valuable floor space.

Installation flexibility allows placement in mechanical rooms, basements, or rooftop locations. Your building meets modern fire codes without expensive fire suppression infrastructure.

Our Manufacturing Excellence

We use more than 120 sets of high-tech work tools. CNC automatic wrapping tools make sure that the coils are built correctly. CNC static vacuum casting tools get rid of air bubbles and make sure that all of the plastic goes through.

There are 15 top engineers and more than 30 intermediate techs on our technical team. We have 17 top workers working for us, and we do strict quality control at every stage of production.

Before it is shipped, every transformer goes through a lot of tests. Verification of the voltage ratio keeps the correctness within ±0.5%. The resistance to insulation is more than 1000 megohms. Levels below 10pC at 1.1 times the maximum voltage were confirmed by partial discharge tests.

By putting units to 125% of their maximum capacity, temperature rise testing confirms that they work well at high temperatures. A test of the sound level shows that the noise levels meet the requirements.

Quality Assurance You Can Trust

We implement strict quality management from raw material procurement through installation. Each production step follows comprehensive monitoring protocols per ISO9001 standards.

Incoming inspection verifies material compliance. Production monitoring tracks critical parameters continuously. Finished product inspection includes electrical testing, mechanical integrity verification, and environmental validation.

Only products meeting our "zero defects" philosophy leave the factory. You receive documentation including material certificates, manufacturing process records, and compliance certifications.

Proven Project Track Record

Municipal Engineering Success

We supplied transformers for Xuzhou Rail Transit Network Control Center with dual-circuit power supply designs. The Xuzhou High-speed Railway East Station project demonstrated our capability for critical infrastructure.

Commercial Projects

Xinhuai Central Complex, Huaihai Xintiandi Phases 7-8, and Xuzhou Fantawild Adventure rely on our solutions. The Tianyu Yayuan project achieved top quality assessment results.

Industrial Applications

XCMG Group factory power supply upgrades were completed ahead of schedule. GCL Photovoltaic Industrial Park and Huaihai Biomedical Industrial Park projects maintained high quality standards while meeting aggressive timelines.

FAQ

Q: What is the expected lifespan and how does aging affect performance?

A: You can expect 25-30 years of maintenance-free operation under normal conditions. Aging primarily affects epoxy resin insulation through thermal and electrical stress. We monitor this through periodic partial discharge testing per IEC 60270 standards. Regular infrared thermography helps predict remaining life. Degradation rates are significantly slower than oil-filled units due to the stable polymer matrix.

Q: How do these units perform in extreme temperature environments?

A: Standard models operate from -25°C to +40°C ambient temperature without derating. For extreme conditions, special designs accommodate -40°C to +50°C with Class H (180°C) insulation upgrades. Derating of 1.5% per degree above 40°C ambient applies, validated through temperature rise testing per IEC 60076-2 standards.

Q: What maintenance procedures are required?

A: Your product requires minimal maintenance. Annual visual inspection for physical damage and infrared thermography to detect hot spots are sufficient. Clean ventilation ducts annually for optimal cooling. Every 5 years, comprehensive testing includes insulation resistance measurement, partial discharge testing per IEC 60270, and protective relay calibration.

Q: How do these transformers handle power quality issues?

A: The robust construction provides excellent harmonic handling capability up to 150% of fundamental current for typical office loads. Special K-factor designs accommodate non-linear loads with total harmonic distortion up to 20%. Voltage regulation typically remains within ±2% from no-load to full-load conditions.

Q: Can these units operate at high altitudes?

A: Yes, our standard design accommodates installation up to 4000 meters altitude. Above 1000 meters, slight derating may apply based on reduced air density affecting cooling. We provide detailed derating curves for your specific installation altitude.

Q: What cooling methods are available?

A: You choose between natural air (AN) or forced air (AF) cooling. Natural cooling suits standard load conditions. Forced air cooling with fans enables 150% rated load operation during peak demand periods.

Contact Us

Ready to upgrade your Three Phase Cast Resin Dry-type Distribution Transformer power distribution infrastructure? Email us at tuojie@electricinchina.com for customized solutions tailored to your specific requirements.