Medium Voltage Potential Transformers

Fibre & Fibre Glass Products designs and manufactures Current and Potential Transformers in its unit in Vadodara. Fibre & Fibre has facility of in-house fabrication, Painting and Testing.

FIBRE AND FIBRE GLASS PRODUCTS, DESIGNS THE TRANSFORMERS AS PER CUSTOMER REQUIREMENTS

Application :

Role of potential transformers in electrical systems is of prime importance as they are the means of stepping down voltage to measurable values. Secondary voltage is of proportionately lower value to the primary voltage. Potential Transformers can thus be used with voltmeters for the measurement of voltage and relays for protection of electrical systems.

Basic Feature :

• To reduce primary voltage to a measurable value
• To protect electrical systems with the help of relays
• To reduce risk to humans by isolating measuring side from high Current/Voltage side

Design Criterion

Voltage Transformers operate on the principle of electromagnetism. Super enameled copper wire is used for primary and secondary winding. The transformer coil is designed to keep uniform voltage in all layers of winding. Secondary winding is separately wound and inserted in the primary winding. Kraft and Crepe paper is used to provide insulation to primary and secondary windings.

Cold Rolled Grain Oriented (CRGO) silicon steel is used for building the core stack. The stack is designed to reduce losses due to leakage reactance.

The transformer is dried and filled with filtered transformer oil under vacuum.

Nitrogen gas is filled above the oil to hermetically seal the transformer from the outside. The metal parts can be painted or galvanized as per customer requirements/specification. All fasteners used are hot dip galvanized. Stainless steel fasteners can be used on request.