On Load Tap Changer Manufacturer & Supplier | OLTC Solutions

An On Load Tap Changer (OLTC) is a key component in power transformers and distribution transformers. It allows voltage regulation while the transformer remains energized, ensuring stable output voltage, improved power quality, and uninterrupted power supply.

As a professional on load tap changer manufacturer and supplier, we provide a full range of OLTC solutions. Our products include oil-immersed, vacuum, composite, and dry-type on load tap changers. These solutions are designed for distribution transformers, power transformers, special-purpose transformers, and smart grid applications.

OLTC Product Range

SV Series On Load Tap Changer

The SV Series On Load Tap Changer is a mature and widely adopted OLTC design. It delivers stable voltage regulation and proven reliability under rated load conditions.

The SV Series features a robust and time-tested structure, stable switching performance during load operation, long mechanical service life, and a design that supports easy installation and routine maintenance.

This OLTC is commonly used in distribution transformers, medium-voltage power transformers, and industrial power systems where reliability and simplicity are essential.

F Series Composite On Load Tap Changer

The F Series Composite On Load Tap Changer uses a composite switching structure that integrates multiple mechanisms to enhance durability and switching reliability.

Its optimized contact design reduces wear during frequent tap changes, while high mechanical endurance makes it suitable for applications with frequent voltage regulation requirements.

The F Series OLTC is widely applied in utility substations and transformers operating under fluctuating load conditions.

On Load Voltage and Capacity Regulating Tap Changer

This OLTC solution combines voltage regulation and capacity adjustment in a single design. It enables transformers to adapt flexibly to changing grid conditions and load demands.

The tap changer features a precision transmission mechanism and supports manual, electric, and automatic control modes. It can also be integrated with transformer monitoring and control systems.

This type of OLTC is suitable for large power transformers, grid load balancing projects, and peak shaving applications.

Composite Vacuum On Load Tap Changer

The Composite Vacuum On Load Tap Changer applies vacuum interrupter technology to extinguish arcs during load switching. This significantly improves electrical endurance and operational reliability.

The composite structure enhances mechanical strength, reduces maintenance requirements, and extends the electrical service life of the tap changer.

This OLTC is ideal for power transformers that require high operational reliability and systems with frequent on load tap changing operations.

Vacuum Permanent Magnet Horizontal On Load Tap Changer

The Vacuum Permanent Magnet Horizontal OLTC combines a permanent magnet operating mechanism with vacuum interrupters. This design provides high efficiency, stable switching, and low energy consumption.

The horizontal structure allows flexible installation, while excellent vibration resistance ensures reliable operation in demanding environments.

This OLTC is suitable for compact transformer designs, special installation conditions, and high-reliability power systems.

Dry-Type Vacuum On Load Tap Changer

The Dry-Type Vacuum On Load Tap Changer is an oil-free solution developed for environmentally sensitive and indoor applications.

It uses vacuum interrupter technology to achieve safe and reliable switching without insulating oil. The design is fire-safe, environmentally friendly, and well suited for enclosed substations.

This OLTC is widely used in dry-type transformers, indoor substations, and projects with strict environmental and fire safety requirements.

Why Choose Our On Load Tap Changers

Our OLTC products are designed in accordance with international standards and undergo strict quality control and testing. With a complete product range and flexible customization options, we support various voltage levels, capacities, and application scenarios.

As an experienced on load tap changer manufacturer and supplier, we provide technical consultation, product selection support, and long-term service to ensure reliable transformer voltage regulation throughout the equipment lifecycle.

For OLTC selection, technical specifications, or customized transformer tap changer solutions, please contact us for professional support.

Typical Technical Parameters of OLTC

All OLTC parameters can be customized according to transformer design and project requirements.