transformer

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matt11111

Joined May 12, 2009
11
I have a transformer that is 3 phase and rated at:

45KVA
H.V=600v, L.V= 208/120

I assumed because of the two different output voltages (208 and 120) that the transformer was a 3 winding model with two secondary coils. Is a 3 winding transformer the only way to achieve two different output voltages or can this be done by other methods such as tapping the secondary coil?
 

t_n_k

Joined Mar 6, 2009
5,448
The LV values are probably dependent on the way the primary or secondary windings are connected - either in star or delta configuration. To allow you to connect in either configuration you would need each secondary winding terminal to be available (3x2=6 wires).

Notice that 208/120 = 1.732 = sqrt(3)
 
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