OLTC Transformers with On-Load Tap Changer

Revolutionary solution for voltage stabilization and efficient energy distribution

our OLTC transformers with an on-load tap changer represent an innovative technical solution that enables automatic voltage regulation without interrupting the power supply. A key advantage is that this tap changer can be installed in standard distribution transformers with a capacity of 400–1600 kVA, ensuring a high level of flexibility and cost-efficiency.

How Does the Tap Changer Work?
  • 9 Regulation Positions – (±2.5% relative to the central 5th position)
  • Automatic Voltage Monitoring  – the device continuously measures changes on the secondary side and adjusts the primary winding position
  • Constant Output Voltage  – ensures electrical power stability without manual intervention
Key Advantages:
  • Improved Power Quality – Ideal for areas with frequent voltage fluctuations
  • Energy Efficiency – Reduces losses and increases savings in production and distribution
  • Suitable for Solar Power Plants – An optimal solution for stabilizing output voltage in renewable energy systems
  • Universal Application – Can be used in industry, commercial facilities, and public power grids

Each ENERGOMONT power transformer comes equipped with a set of high-quality components that guarantee long-lasting reliability.

Standard transformer equipment:

  • High-voltage terminal (HV terminal) – Available in standard ceramic design or Plug-in type
  • Low-voltage terminal (LV terminal) – With or without flag connectors
  • OLTC Tap Changer – Automatic voltage stabilization without interruption in operation
  • Relay Protection – Detects oil level changes or gas accumulation
  • Identification Plate – Detailed technical specifications in one place
  • Wheels – Easy mobility even for heavy-duty models
  • Pressure Relief Valve – Prevents tank damage in case of failure (for hermetically sealed transformers)
Why Choose Our OLTC Transformers?

Proven Technology

– reliability in all operating conditions

Minimal maintenance

– automatic system reduces the need for interventions

Economically
efficient

– long-term energy savings and reduced distribution costs

If you need a stable and efficient solution for voltage regulation, our experts will provide you with the optimal transformer configuration with an OLTC tap changer.

ENSURE HIGH-QUALITY AND COST-EFFECTIVE ELECTRICITY DISTRIBUTION!

Contact us for a free specification for your project!

OLTC Transformers with On-Load Tap Changer

Revolutionary solution for voltage stabilization and efficient energy distribution

Our OLTC transformers with an on-load tap changer represent an innovative technical solution that enables automatic voltage regulation without interrupting the power supply.
A key advantage is that this tap changer can be installed in standard distribution transformers with a capacity of 400–1600 kVA, ensuring a high level of flexibility and cost-efficiency.

How Does the Tap Changer Work?
  • 9 Regulation Positions – (±2.5% relative to the central 5th position)
  • Automatic Voltage Monitoring – the device continuously measures changes on the secondary side and adjusts the primary winding position
  • Constant Output Voltage  – ensures electrical power stability without manual intervention

Glavne prednosti:

  • Improved Power Quality – Ideal for areas with frequent voltage fluctuations
  • Energy Efficiency – Reduces losses and increases savings in production and distribution
  • Suitable for Solar Power Plants – An optimal solution for stabilizing output voltage in renewable energy systems
  • Universal Application – Can be used in industry, commercial facilities, and public power grids

Each ENERGOMONT power transformer comes equipped with a set of high-quality components that guarantee long-lasting reliability.

Standard transformer equipment:

  • High-voltage terminal (HV terminal) – Available in standard ceramic design or Plug-in type
  • Low-voltage terminal (LV terminal) – With or without flag connectors
  • OLTC Tap Changer – Automatic voltage stabilization without interruption in operation
  • Relay Protection – Detects oil level changes or gas accumulation

  • Identification Plate – Detailed technical specifications in one place

  • Wheels – Easy mobility even for heavy-duty models
  • Pressure Relief Valve – Prevents tank damage in case of failure (for hermetically sealed transformers)
Why Choose Our OLTC Transformers?

Proven Technology

– reliability in all operating conditions

Minimal maintenance

– automatic system reduces the need for interventions

Economically efficient

– long-term energy savings and reduced distribution costs

If you need a stable and efficient solution for voltage regulation, our experts will provide you with the optimal transformer configuration with an OLTC tap changer.

ENSURE HIGH-QUALITY AND COST-EFFECTIVE ELECTRICITY DISTRIBUTION!

Contact us for a free specification for your project!
DOWNLOAD OLTC CATALOGUE

OLTC 

ON-LOAD TAP CHANGER

ENERGOMONT

SERBIA'S SOLE OLTC
TRANSFORMER MAKER

ECO2T Type

Smart Uninterrupted Voltage Regulation

  • Full-load operation
    - Voltage adjustment without power interruption
  • Universal installation
    - Compatible with standard transformers (400-1600kVA)
  • Automatic control
    - 9 positions (±2.5%) for precise stabilization
  • Direct savings
    - Reduces energy losses by up to 15%

2-year warranty 

All components and insulation systems are included under warranty

Request a free quote!

Our range of oil-immersed power transformers

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Our range of oil-immersed power transformers