On-Load Tap Changers

On Load Tap Changer Manufacturer & Supplier

An On Load Tap Changer (OLTC) is a critical component used in power and distribution transformers to regulate voltage while the transformer is energized. By changing tap positions under load, OLTCs ensure stable output voltage, improved power quality, and uninterrupted power supply.

As a professional OLTC manufacturer and supplier, we provide a complete range of on load tap changers, including oil-immersed, vacuum, composite, and dry-type OLTC solutions, suitable for distribution transformers, power transformers, special transformers, and smart grid applications.

OLTC Product Range

SV Series On Load Tap Changer

The SV Series On Load Tap Changer is a widely used and proven OLTC design, offering stable performance and reliable voltage regulation.

Key Features

• Mature and reliable OLTC structure

• Stable switching under rated load conditions

• Long mechanical service life

• Easy installation and maintenance

Applications

• Distribution transformers

• Medium-voltage power transformers

• Industrial power systems

F Series Composite On Load Tap Changer

The F Series Composite OLTC adopts a composite switching structure, combining multiple mechanisms to improve durability and switching reliability.

Key Features

• Composite OLTC structure with optimized contacts

• Reduced contact wear during frequent tap changing

• High mechanical endurance

• Suitable for frequent voltage regulation

Applications

• Utility substations

• Transformers with fluctuating loads

On Load Voltage and Capacity Regulating Tap Changer

This On Load Voltage and Capacity Regulating Tap Changer enables both voltage adjustment and capacity regulation, allowing transformers to adapt to varying grid conditions.

Key Features

• Dual-function OLTC design: voltage and capacity regulation

• Precision transmission mechanism

• Supports manual, electric, and automatic control

• Compatible with transformer monitoring systems

Applications

• Large power transformers

• Grid load balancing and peak shaving projects

Composite Vacuum On Load Tap Changer

The Composite Vacuum On Load Tap Changer uses vacuum interrupter technology to extinguish arcs during load switching, significantly improving electrical endurance.

Key Features

• Vacuum OLTC technology with excellent arc-quenching performance

• Composite structure for enhanced reliability

• Reduced maintenance requirements

• Extended electrical service life

Applications

• Power transformers requiring high operational reliability

• Systems with frequent OLTC operations

Vacuum Permanent Magnet Horizontal On Load Tap Changer

The Vacuum Permanent Magnet Horizontal OLTC combines a permanent magnet operating mechanism with vacuum interrupters, offering high efficiency and stable performance.

Key Features

• Permanent magnet drive with low energy consumption

• Vacuum switching contacts with high endurance

• Horizontal OLTC structure for flexible installation

• Excellent vibration resistance

Applications

• Compact transformer designs

• Special installation environments

• High-reliability power systems

Dry-Type Vacuum On Load Tap Changer

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

Key Features

• Oil-free dry-type OLTC design

• Vacuum interrupter technology for safe switching

• Fire-safe and environmentally friendly

• Suitable for indoor substations

Applications

• Dry-type transformers

• Indoor and enclosed substations

• Projects with strict environmental requirements

Typical Technical Parameters of OLTC

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