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The 35kV Indoor Dry Type Power Transformer with On Load Tap Changer (OLTC) is a compact, environmentally friendly solution designed for reliable power distribution in indoor substations and commercial/industrial facilities. Utilizing vacuum-cast epoxy resin insulation, this transformer eliminates the need for mineral oil, offering a fire-safe, low-maintenance alternative to oil-filled units. The integrated OLTC allows seamless voltage regulation under load, ensuring stable power supply in fluctuating grid conditions.
The transformer core is constructed from high-grade grain-oriented silicon steel to minimize hysteresis losses, while the windings are encapsulated in epoxy for superior thermal conductivity and mechanical protection. The OLTC mechanism features a motorized drive with digital control, enabling precise voltage adjustments (typically ±10% in 19 steps) without interrupting power flow. Designed for indoor installation, it complies with IEC 60076 and IEEE Std C57 standards, ensuring safety and performance in confined spaces with strict environmental regulations.
Oil-Free Design: Eliminates fire hazards and environmental risks associated with oil leakage, making it suitable for densely populated areas and buildings with strict safety codes.
On-Load Voltage Regulation: The OLTC maintains output voltage stability within ±0.5%, critical for sensitive equipment in data centers, hospitals, and industrial processes.
Low Noise & Vibration: Advanced core lamination and epoxy encapsulation reduce noise levels to below 55dB, meeting urban noise control requirements.
High Thermal Stability: Operates at temperatures up to 155°C (Class F insulation), with a short-circuit withstand capability that exceeds international standards.
Smart Monitoring: Optional digital sensors provide real-time data on temperature, tap position, and load status, enabling predictive maintenance and remote management.
Commercial Buildings: Powers office complexes, shopping malls, and hotels, ensuring reliable voltage for elevators, HVAC systems, and IT infrastructure.
Industrial Facilities: Supports manufacturing plants, refineries, and mines, regulating voltage for heavy machinery and variable-speed drives.
Data Centers & Hospitals: The oil-free, low-maintenance design meets strict safety standards for critical facilities where downtime is unacceptable.
Urban Substations: Fits into compact indoor spaces in city centers, replacing bulky oil-filled transformers with a more space-efficient solution.
Renovation Projects: Easily retrofitted into existing installations due to its modular design and compatibility with standard electrical interfaces.
Q: How often does the OLTC require maintenance?
A: The tap changer has a maintenance interval of 10,000 operations or every 2 years, with minimal lubrication and contact checks needed.
Q: Can the transformer operate in humid environments?
A: Yes, the epoxy insulation is moisture-resistant and passes IEC 60216-1 tests for humidity endurance, suitable for environments with up to 95% relative humidity.
Q: What is the efficiency rating at full load?
A: Typical efficiency exceeds 98.5% at rated load, with low no-load losses due to the high-quality silicon steel core.
Q: Is the transformer suitable for renewable energy integration?
A: Yes, it efficiently handles voltage fluctuations from solar/wind inverters, with the OLTC compensating for variable input voltages.
Q: How is the transformer cooled in enclosed spaces?
A: Natural air convection (AN) or forced air cooling (AF) options are available, with AF increasing capacity by 25% during overload conditions.
35kV Dry Type Power Transformer With Off-circuit Tap Changer
35kV Dry Type Power Transformer With On Load Tap Changer
The 35kV Indoor Dry Type Power Transformer with On Load Tap Changer (OLTC) is a compact, environmentally friendly solution designed for reliable power distribution in indoor substations and commercial/industrial facilities. Utilizing vacuum-cast epoxy resin insulation, this transformer eliminates the need for mineral oil, offering a fire-safe, low-maintenance alternative to oil-filled units. The integrated OLTC allows seamless voltage regulation under load, ensuring stable power supply in fluctuating grid conditions.
The transformer core is constructed from high-grade grain-oriented silicon steel to minimize hysteresis losses, while the windings are encapsulated in epoxy for superior thermal conductivity and mechanical protection. The OLTC mechanism features a motorized drive with digital control, enabling precise voltage adjustments (typically ±10% in 19 steps) without interrupting power flow. Designed for indoor installation, it complies with IEC 60076 and IEEE Std C57 standards, ensuring safety and performance in confined spaces with strict environmental regulations.
Oil-Free Design: Eliminates fire hazards and environmental risks associated with oil leakage, making it suitable for densely populated areas and buildings with strict safety codes.
On-Load Voltage Regulation: The OLTC maintains output voltage stability within ±0.5%, critical for sensitive equipment in data centers, hospitals, and industrial processes.
Low Noise & Vibration: Advanced core lamination and epoxy encapsulation reduce noise levels to below 55dB, meeting urban noise control requirements.
High Thermal Stability: Operates at temperatures up to 155°C (Class F insulation), with a short-circuit withstand capability that exceeds international standards.
Smart Monitoring: Optional digital sensors provide real-time data on temperature, tap position, and load status, enabling predictive maintenance and remote management.
Commercial Buildings: Powers office complexes, shopping malls, and hotels, ensuring reliable voltage for elevators, HVAC systems, and IT infrastructure.
Industrial Facilities: Supports manufacturing plants, refineries, and mines, regulating voltage for heavy machinery and variable-speed drives.
Data Centers & Hospitals: The oil-free, low-maintenance design meets strict safety standards for critical facilities where downtime is unacceptable.
Urban Substations: Fits into compact indoor spaces in city centers, replacing bulky oil-filled transformers with a more space-efficient solution.
Renovation Projects: Easily retrofitted into existing installations due to its modular design and compatibility with standard electrical interfaces.
Q: How often does the OLTC require maintenance?
A: The tap changer has a maintenance interval of 10,000 operations or every 2 years, with minimal lubrication and contact checks needed.
Q: Can the transformer operate in humid environments?
A: Yes, the epoxy insulation is moisture-resistant and passes IEC 60216-1 tests for humidity endurance, suitable for environments with up to 95% relative humidity.
Q: What is the efficiency rating at full load?
A: Typical efficiency exceeds 98.5% at rated load, with low no-load losses due to the high-quality silicon steel core.
Q: Is the transformer suitable for renewable energy integration?
A: Yes, it efficiently handles voltage fluctuations from solar/wind inverters, with the OLTC compensating for variable input voltages.
Q: How is the transformer cooled in enclosed spaces?
A: Natural air convection (AN) or forced air cooling (AF) options are available, with AF increasing capacity by 25% during overload conditions.
35kV Dry Type Power Transformer With Off-circuit Tap Changer
35kV Dry Type Power Transformer With On Load Tap Changer
