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Phase 2 phase connection
12000
Phase to phase or phase to ground connection
12000/20800 Y
Phase to ground Connection
20800 GRDY/ 12000
When the primary Coil rating is printed after the system voltage the transformer will have …
One bushing, and it must be connected phase the ground
Tap changer
No load manual switch that is connected to the primary coil and increases or decreases the turns ratio
Each tap raises or lowers the secondary voltage by
2.5 % or 4.5%