Inductive Voltage Transformer EOF

Oil-paper insulated inductive voltage transformers type EOF are used in high voltage networks within the 24-245 kV range. They transform high voltage into standardised values for meters, measuring and protection devices.

The active part of the voltage transformer is located in the foot housing. The fine graded bushing is inside the insulator.

The expansion system is located in the head of the voltage transformer. This unit acts as volume compensation for the oil in case of temperature variations. For voltage transformers of 24-72 kV, a highly flexible, temperature-resistant membrane made from fluoroelastomers (VITON®) is used. Voltage transformers >72 kV have an expansion cell made of stainless steel.

All voltage transformers have either a high-quality porcelain or a high-grade silicone composite insulator. Different creepage distances are available according to different pollution classes, as specified in the standards.

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