Time: 20:00
Important one liner (Construction of Transformer Quiz)
- The core of a transformer is constructed from thin silicon steel laminations to minimize eddy current losses and improve efficiency.
- High-quality insulation materials are used between windings to prevent electrical breakdown and ensure long-term reliability in transformer operation.
- Primary and secondary windings are typically made of copper or aluminum conductors selected based on current-carrying capacity and thermal performance.
- Layered winding techniques enhance heat dissipation by creating uniform temperature distribution across the winding assembly.
- Conservator tanks accommodate oil expansion and contraction, maintaining proper oil levels and preventing moisture ingress into the transformer.
- On-load tap changers allow voltage regulation under varying load conditions without interrupting power flow to the load.
- Buchholz relay protects the transformer by detecting gas accumulation caused by internal faults and triggering alarms or trips.
- Radiators increase surface area for oil cooling, ensuring the transformer operates within safe temperature limits during high-load periods.
- Pressure relief devices safeguard against catastrophic failures by venting excessive internal pressure caused by arcing or faults.
- Interleaved winding designs reduce leakage inductance, which improves voltage regulation and reduces no-load losses in the transformer.
- Ferrite cores are used in high-frequency applications to provide low core losses at switching frequencies beyond the power range.
- Silicon steel laminations have a typical thickness of 0.35 mm to balance manufacturing cost and eddy current loss reduction performance.
- Oil-filled transformers use mineral oil which provides both insulation and cooling functions under normal operating conditions.
- Dry-type transformers employ air or epoxy resin insulation to eliminate flammable oil, enhancing fire safety in indoor installations.
- Transformers are designed with magnetic shunts or shielding to manage stray magnetic flux and reduce electromagnetic interference.
- Proper core clamping ensures mechanical stability, minimizes vibration noise, and maintains consistent flux paths within the transformer.
- The turns ratio of primary to secondary windings determines the voltage transformation capability of the transformer.
- Dielectric tests, such as power frequency and impulse tests, verify the integrity of insulation under high-voltage stress conditions.
- Cooling methods like ONAN and ONAF are selected based on transformer rating, ambient conditions, and installation environment.
- Thermal monitoring systems, including PD sensors and temperature gauges, help detect overheating and prevent premature failures.
- Core design configurations—such as core-type and shell-type—are chosen based on power rating, size constraints, and magnetic performance.
- Tap changer positions are tagged on the transformer tank to allow maintenance personnel to identify and set correct voltage levels.
- Transformer bushings provide insulated passageways for conductors, maintaining the sealing and electrical integrity of the tank.
- Transformer oil purification systems remove moisture, gases, and particulate contaminants to extend equipment life and reliability.
Keywords: Construction of Transformer, Transformer Parts, Transformer Core, Transformer Windings, Insulation in Transformer, Cooling Methods in Transformer, Tap Changer, Transformer Efficiency, Transformer Losses, Types of Transformer, Transformer Design Quiz