Oil-insulated medium-voltage transformers
Great things often come in compact designs. Our medium-voltage oil-insulated transformers encompass four key types: current transformers (AGU), voltage transformers (VKU), combined transformers (VAK), and high-power voltage transformers (VKT). As part of our GREEN LINE series, all models can be equipped with biodegradable insulating fluids, offering a sustainable choice without compromising on performance.
Current transformer type AGU
- Supports up to 6 current cores (suitable for metering, protection, or transient accuracy classes)
- Enhanced measuring range for current cores
- Partial discharge-free under AC test voltage
- Robust insulation system designed to withstand very fast transient overvoltages
- Oil expansion effectively managed by a stainless-steel membrane
- Broad operational temperature range from -60 to +60 °C
- Proven reliability in seismically active environments
- Resistant to internal electrical arcs (Internal Arc Classification II)
- High operational safety with minimal maintenance requirements
Voltage transformer type VKU
- Up to 6 secondary windings
- Partial discharge-free under AC test voltage
- Robust insulation system designed to withstand very fast transient overvoltages
- Explosion-proof design, resistant to internal electrical arcs
- Oil expansion effectively managed by a stainless-steel membrane
- Broad operational temperature range from -60 to +60 °C
- Proven reliability in seismically active environments
- Optimized design with minimal oil requirements
- High operational safety with minimal maintenance requirements
Combined transformer type VAK
- Supports up to 5 current cores (suitable for metering, protection, or transient accuracy classes)
- Up to 6 secondary windings
- Enhanced measuring range for current cores
- Robust insulation system designed to withstand very fast transient overvoltages
- Explosion-proof design, resistant to internal electrical arcs
- Partial discharge-free under AC test voltage
- Oil expansion effectively managed by a stainless-steel membrane
- Broad operational temperature range from -60 to +60 °C
- Proven reliability in seismically active environments
- Optimized design with minimal oil requirements
- High operational safety with minimal maintenance requirements
High power voltage transformer type VKT
- Rated power ranging from 10 to 167 kVA
- Available in variants with low-voltage secondary windings (up to 1,000 V) or medium-voltage secondary windings (up to 7.2 kV)
- Option to integrate measuring windings
- Partial discharge-free under AC test voltage
- Robust insulation system designed to withstand very fast transient overvoltages
- Explosion-proof design, resistant to internal electrical arcs
- Oil expansion effectively managed by a stainless-steel membrane
- Broad operational temperature range from -60 to +60 °C
- Proven reliability in seismically active environments
- High operational safety with minimal maintenance requirements