Pad-Mounted Oil-Immersed OLTC Distribution Transformer is a key device of modern smart grids, especially suitable for occasions with large voltage fluctuations and high requirements for power supply quality.
Overview:
Pad-Mounted Oil-Immersed OLTC Distribution Transformer is an outdoor-installed power equipment that regulates voltage under load. It is mainly used in urban distribution networks, industrial power supply, renewable energy systems and other occasions that require stable voltage regulation. Its core feature is the integration of On-Load Tap Changer (OLTC), which can adjust the output voltage without power interruption to ensure the power supply quality.
Key Structural Features:
Fully sealed oil tank design
The welded oil tank eliminates the need for an oil conservator (or respirator) to prevent oxidation and moisture in the insulating oil, reducing maintenance requirements.
Equipped with a pressure relief device (bursting disc or pressure valve) for enhanced safety.
Three-phase integrated structure
The compact design includes both high- and low-voltage sides and is equipped with an on-load tap-changer. It supports variable voltage switching, making it suitable for most applications.
Common types include resistance (fast switching) and vacuum (maintenance-free, suitable for frequent voltage adjustments).
Pad-mounted enclosure
Supports multiple protection levels, depending on customer requirements, and can be installed outdoors. Anti-theft locks and warning signs are required.
Oil-immersion cooling system
Typically uses mineral oil, but environmentally friendly insulating oil can be used upon request.
Cooling methods include ONAN and ONAF, suitable for various environments.
Typical applications:
It is used in urban distribution networks, such as commercial areas, residential areas, data centers and other places that require stable voltage.
Suitable for industrial power distribution, including factories, mines, petrochemicals and other industrial areas.
Supports renewable energy and can be applied in wind power generation as well as photovoltaic substations
Infrastructure can also be used directly, including hospitals, airports, subways, residential areas and other places.
Advantages:
It has flexible voltage regulation capabilities and can improve power supply quality.
The fully sealed structure enables it to adapt to various harsh environments and operate reliably.
It is small in size, easy to install, and can save space and construction costs.
It has a good overload capacity and can meet the demand for temporary or short-term load growth.
