Part 2 · Technical · Section 4
Install, Size, and Maintain Transformers
*Check transformer oil for contaminants · *Clean power transformer · *Connect a dual voltage transformer for its highest input and output · *Connect a dual voltage transformer for the low voltage input and output · *Connect an amp meter to a high voltage line using a current transformer · *Connect a volt meter to a power line through the use of a potential transformer · Connect an auto-transformer to give a variety of voltages · Connect power-supply distribution transformer to supply 115 and 230 volts · *Connect power-supply distribution transformer to supply 3-phase power, 4-wire connection ·
4lessons · ~34 min
86questions
15%of the exam
01Separately Derived Systems and Transformer SecondariesWorked Examples (250.30, Table 250.102(C)(1), Table 250.66, 250.104(D), 240.21(C), Table 450.5(B), 450.6) · 9 min · public preview02Generators (Article 445) and Transformers (Article 450)Conductors, Overcurrent Protection, Disconnects and Locations · 8 min · public preview03Transformer ConnectionsTurns Ratio, Polarity and Dual-Voltage Windings, Three-Phase Banks (Delta-Delta, Delta-Wye, Wye-Delta, Wye-Wye, Open Delta), Parallel Operation, Autotransformers and Instrument Transformers · 8 min · public preview04Transformer MaintenanceInspection, Cleaning, Insulating-Liquid Tests, Winding Tests and Load Testing · 9 min · public preview
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