Three Phase 33KV Oil Type Transformer with OLTC

Product Highlights

• Wide Applicability: Suitable for outdoor applications, including residential, commercial, and industrial settings.
• Advanced Core and Winding Design: Premium grain-oriented silicon steel core and high-grade copper windings ensure minimal losses and low operating noise.
• On-Load Tap-Changer (OLTC) System: Provides real-time voltage regulation with multiple tap positions and smooth transitions, ensuring continuous and stable power supply.
• High-Efficiency Cooling: ONAN/ONAF cooling options with advanced radiator configuration and optimized oil flow channels ensure efficient heat dissipation.
• Comprehensive Safety Features: Equipped with a Buchholz relay, pressure relief device, and various temperature and oil level indicators.
• Customizable Voltage Ratings: Available in various voltage ratings to meet specific application requirements.

Key Technical Features

Core and Winding Design

• Premium Grain-Oriented Silicon Steel Core: Ensures minimal core losses and low operating noise.
• High-Grade Copper Windings: Provides excellent electrical conductivity and durability.
• Advanced Insulation System: Ensures long-term reliability and safety.
• Optimized Magnetic Circuit: Reduces no-load losses and enhances efficiency.
• Enhanced Short-Circuit Strength: Designed to withstand short-circuit conditions without damage.
• Low Loss Design: Minimizes energy losses during operation.

On-Load Tap-Changer (OLTC) System

• Advanced On-Load Tap Changing Technology: Allows real-time voltage regulation without interrupting the power supply.
• Multiple Tap Positions: ±8×1.25% tap range for precise voltage control.
• Smooth Transition Between Taps: Ensures minimal switching interruption and smooth operation.
• Enhanced Reliability Mechanism: Built-in fail-safe mechanisms to ensure reliable operation.

Cooling System

• ONAN/ONAF Cooling Options: Natural or forced air cooling methods to suit different environmental conditions.
• Efficient Oil Circulation Design: Ensures uniform heat distribution and effective cooling.
• Advanced Radiator Configuration: Optimized for maximum heat dissipation.
• Temperature Monitoring System: Continuous monitoring of oil and winding temperatures to prevent overheating.
• Optimized Oil Flow Channels: Enhances heat dissipation and maintains optimal operating temperatures.

Technical Specifications

• Rated Voltage: 33kV
• Frequency: 50/60Hz
• Vector Group: Dyn11
• Cooling Method: ONAN/ONAF
• Tap Changer Range: ±8×1.25%
• Temperature Rise: ≤55K (oil) / ≤60K (winding)
• Insulation Level: According to IEC standards
• Short Circuit Impedance: As per requirement
• No-Load Loss: As per IEC standards
• Load Loss: As per IEC standards

Protection Features

• Buchholz Relay: Detects gas accumulation in the transformer, providing early warning of potential issues.
• Pressure Relief Device: Safely releases pressure in case of failure.
• Oil Level Indicators: Monitor oil levels to ensure proper operation.
• Winding Temperature Indicators: Continuous monitoring to prevent overheating.
• Oil Temperature Indicators: Continuous monitoring to ensure optimal operating conditions.
• OLTC Protective Devices: Ensures safe and reliable operation of the tap changer.
• Lightning Arresters (Optional): Additional protection against lightning strikes.

Applications

• Power Distribution Networks: Ideal for providing reliable power distribution in residential and commercial areas.
• Industrial Facilities: Supports stable power for production lines, machinery, and other industrial applications.
• Renewable Energy Plants: Suitable for renewable energy installations, ensuring stable voltage regulation.
• Substations: Perfect for substation applications, providing continuous and reliable power supply.
• Mining Operations: Supports power needs in mining operations, ensuring stable and safe operation.
• Infrastructure Projects: Ideal for infrastructure projects requiring medium-to-high voltage transformation.
• Grid Interconnection Points: Ensures stable and reliable power transmission at grid interconnection points.

Key Advantages

Operational Benefits

• Continuous Voltage Regulation: Real-time voltage regulation ensures a stable power supply.
• High Operational Reliability: Advanced design and protection systems ensure long-term reliability.
• Excellent Overload Capacity: Capable of handling high loads without compromising performance.
• Low Maintenance Requirements: Robust design and high-quality materials minimize maintenance needs.
• Long Service Life: Designed for a long service life with minimal downtime.
• High Efficiency: Minimizes energy losses and maximizes operational efficiency.

Safety Features

• Advanced Protection System: Comprehensive protection devices ensure safe operation.
• Fail-Safe Mechanisms: Built-in fail-safe mechanisms to prevent accidents.
• Environmental Protection: Designed to minimize environmental impact.
• Fire Safety Measures: Includes fire-resistant materials and design.
• Explosion-Proof Design: Ensures safety in potentially explosive environments.
• Seismic Resistance (Optional): Can be designed to withstand seismic activity.

Monitoring and Control

• OLTC Position Indicator: Monitors the position of the tap changer.
• Temperature Monitoring: Continuous monitoring of oil and winding temperatures.
• Oil Level Monitoring: Continuous monitoring of oil levels.
• Pressure Monitoring: Continuous monitoring of internal pressure.
• Optional Remote Monitoring: Can be integrated with smart grid systems for remote monitoring and control.
• Smart Grid Compatibility: Designed to work seamlessly with smart grid technologies.

The specific parameter table is as follows, please refer to the parameter table in the figure below!

Contact us for detailed specification

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