TVI Series SF6 Inductive Voltage Transformer

Overview

TVI (Inductive Voltage Transformer) is the result of practical experience with SF6 instrument transformers and inductive voltage transformers for PASS and GIS. This SF6 gas insulated inductive type of voltage transformer is built for revenue metering and protection in high voltage networks. It is designed for the most varied conditions, from polar to desert climates. The use of a composite insulator and pressure relief device ensures greater safety and a higher performance in very heavy polluted environments.

Advantages

The TVI, thanks to the use of SF6 gas and of a composite insulator, offers several advantages:
● highly reliable equipment
● explosion proof design
● maintenance free
● dielectric quality not depending on long treatments
● negligible level of partial discharge
● dielectric mean not subjected to ageing
● wide safety margin against saturation and ferro-resonance
● high seismic withstand capability
● suitable for applications in mobile substations
● higher performance in very heavy polluted environments
● available with a gas insulated disconnector for increased

Flexibility during operation

● Suitable for both metering and protection
● Magnetic cores made of laminated steel with oriented grain and a high level of permeability
● Windings made of electrolytic copper
● Primary winding connected directly to the high voltage side while the secondary winding supplies the low voltage panels
● Insulation system designed to guarantee a life cycle of 30 years. Declared maximum gas leakage: less than 0.1 % per year
● Safety margin for normal wind loads, stress from conductors and seismic forces
● Construction in conformity with national pressure standards
● Installed on a metal support with four eyebolts for lifting.

Technology parameters