33/35KV Oil Immersed Power Distribution Transformer

LUGAO is an experienced China factory, manufacturer, and global supplier of 33kV 35kV Oil-Immersed Power Transformers, The 33/35KV Oil Immersed Power Distribution Transformer is a high-voltage transformer designed for power distribution systems. It uses insulating oil for cooling and protection, ensuring stable operation and preventing overheating. The fully sealed tank protects internal components from dust, air, and moisture, extending service life and reducing maintenance. These transformers are widely used in substations, industrial facilities, and commercial infrastructure to provide reliable, efficient, and safe voltage transformation.

How to Select 33/35KV Oil Immersed Transformer for Power Substation

• Determine voltage rating (33kV or 35kV) based on substation requirements
• Assess load capacity and future expansion needs
• Choose cooling type, insulation class, and tap changer options
• Verify compliance with international standards and site conditions

33/35KV Transformer Installation and Commissioning Procedure

• Inspect 33/35KV Oil Immersed Power Distribution Transformer before delivery for any damage
• Install on a solid foundation with proper grounding
• Connect primary and secondary circuits according to wiring diagram
• Perform insulation resistance and no-load tests before energizing

33/35KV Oil Immersed Transformer Maintenance Schedule

• Monthly: Check oil level, temperature, and external leakage
• Quarterly: Inspect bushings, gaskets, and tap changer
• Annually: Perform oil quality analysis and electrical testing
• Every 5 years: Overhaul and deep inspection of internal components

33/35KV Transformer Oil Leakage Causes and Repair Methods

• Causes: Loose gaskets, damaged bushings, tank corrosion
• Repair: Tighten connections, replace damaged parts, reseal tank
• Prevention: Regular inspections and timely maintenance

Difference Between 33KV and 35KV Power Transformer

• Voltage rating: 33kV vs 35kV
• Design margin and insulation strength
• Load capacity and application suitability for different grids

On-load vs Off-load Tap Changer for 33/35KV Transformer

• On-load tap changer (OLTC): Adjusts voltage under load, suitable for fluctuating demand
• Off-load tap changer (DETC): Adjusts voltage only when 33/35KV Oil Immersed Power Distribution Transformer is de-energized
• Choice depends on power quality requirements and operational flexibility

33/35KV Transformer Full Test Report Items

• Insulation resistance test
• Turns ratio and polarity check
• Load loss and no-load loss measurement
• Dielectric and temperature rise tests
• Oil quality and dielectric strength analysis

How to Reduce Transformer Loss and Operation Cost

• Use high-quality core and copper windings
• Regular maintenance and oil testing
• Ensure proper cooling and ventilation
• Optimize load management and avoid overloading

Key Features and Applications

Key Features:

• Oil-immersed with corrugated tank for efficient cooling
• Fully sealed housing to prevent air and dust ingress
• Long service life and reduced maintenance requirements
• Customizable configurations and components
• Compliant with CE, ISO, and international standards

Applications:

• Power distribution substations
• Industrial and commercial facilities
• Infrastructure projects and utility grids

Why Choose LUGAO?

• Years of experience supplying global clients with 33/35KV Oil Immersed Power Distribution Transformer
• High manufacturing efficiency and ample inventory for fast delivery
• Strict quality control from raw material to final inspection
• Supports custom specifications, private labeling, and bulk orders
• Focus on reducing sourcing risks and total costs for buyers

FAQ

What is the minimum order quantity for 33/35KV transformers?

One unit, shipped in export-grade wooden crates.

Can the transformer be customized?

Yes, voltage rating, tank design, and internal components can be tailored to customer needs.

How often should maintenance be performed?

Monthly, quarterly, annually, and every 5 years, depending on inspection depth and operational conditions.

What standards does LUGAO comply with?

CE, ISO, and other international standards to ensure quality and safety.

Parameter

Rated capacity	Voltage ratio	Vector group	No-load losses(kw)	Impedance
10kva	110v/220v/400/3kv	Dyn11/Yd11/Yyno	0.08	4%
50kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.13	4%
100kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.2	4%
200kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.34	4%
500kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.68	4%
1000kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	1.15	4.5%
2500kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	2.31	4.5%
3.5mva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	2.73	4.5%
24mva	11kv/35kv/69kv/110kv/220kv/400k V	Dyn11/Yd11/Yyno
100mva	11kv/35kv/69kv/110kv/220kv/400k V	Dyn11/Yd11/Yyno

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