High-voltage instrument transformers
Learn more about all types of our high-voltage instrument transformers.
Current transformers – Type AGU
AGU current transformers feature an inverse design optimized for minimal oil content and reduced energy losses. Available with rated voltages from 72.5 kV to 800 kV, rated currents up to 6000 A, and short-time withstand currents of up to 100 kA (250 kA dynamic), they meet the highest industry standards.
Voltage transformer – Type VPU
VPU inductive voltage transformers incorporate an innovative open-core design that provides several operational advantages over conventional products. These include immunity to ferroresonance, explosion-proof construction, and robust resistance to transient overvoltages.
Combined instrument transformers – Type VAU
The VAU combined transformer merges the design features of the AGU current transformer and the VPU inductive voltage transformer. As such, it retains all the operational advantages of both transformer types.
Capacitor voltage transformers – Type VCU
Available with rated voltages from 72.5 kV to 800 kV, VCU capacitor voltage transformers are built with a capacitive divider using state-of-the-art insulation technology, including a mixed dielectric with synthetic impregnation.
High-voltage reactor for HVDC systems – Type VNP
The VNP high-voltage reactor is designed based on the open-core concept that provides several operational advantages over conventional products. These include immunity to ferroresonance, explosion-proof construction, and robust resistance to transient overvoltages. With rated voltages ranging from 72.5 kV to 550 kV, these reactors are engineered for HVDC systems, primarily serving in transformer neutral grounding.
High power voltage transformers (SSVTs) – Type VPT
Building on the principles of inductive voltage transformer design, the high-power voltage transformer, also known as station service voltage transformer (SSVT), is engineered to supply auxiliary power for substations and enable rural electrification. The open-core concept provides several operational advantages over conventional products. These include immunity to ferroresonance, explosion-proof construction, and robust resistance to very fast transient overvoltages.