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We have a step-down transformer (415 / 380 V). It has 9 terminals on primary side (3 each of red, blue and yellow color) and 3 terminals on secondary side.
The connections to its primary side were like that the input supply (415V) was connected to middle wires of red, blue and yellow groups.
I mean that phase 1 was applied to second red wire, phase 2 was applied to second yellow wire. Likewise, phase 3 was applied to second blue wire.
Now what i want to ask is that, if i will apply the input on first wire of red, yellow and blue wires, then, what will be the output on the secondary side. I know it will be different. But, please help me by giving a brief explanation of this kind of transformer.
The connections to its primary side were like that the input supply (415V) was connected to middle wires of red, blue and yellow groups.
I mean that phase 1 was applied to second red wire, phase 2 was applied to second yellow wire. Likewise, phase 3 was applied to second blue wire.
Now what i want to ask is that, if i will apply the input on first wire of red, yellow and blue wires, then, what will be the output on the secondary side. I know it will be different. But, please help me by giving a brief explanation of this kind of transformer.