In the 1990s, the only layout of web uninterruptible source of power was transformer-based. Nowadays, the layout is still obtainable but typically in larger dimensions for UPS from 8 to 800kVA.
Choosing between Transformer-based or transformerless uninterruptible power supplies could not be a straightforward either/or decision, particularly above 10kVA.
In the 1990s, the only layout of web uninterruptible source of power was transformer-based. Nowadays, the layout is still obtainable but typically in larger dimensions for UPS from 8 to 800kVA.
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