Delta is the fourth letter in the Greek alphabet, it equates to the Roman D. A river delta is a triangular or D shaped area at the mouth of a river, such as the Mississippi De…lta; check its appearance on a map. (MORE)
In a delta-delta transformer, none of the actual conductors are grounded, directly or indirectly. .
You do, however, always ground the casing. This is protective earth gr…ound, or PE ground, as opposed to neutral, which is grounded at the distribution panel, but which is a current carrying conductor. PE ground is not a current carrying conductor - it is a safety ground. Some texts use the term ground ed conductor to refer to neutral, and ground ing conductor to refer to PE ground. Simplest designation is neutral and ground. .
In summary, for a delta-delta transformer, there is no neutral, but there is always a ground. There is always a ground in any circuit, even when there is a neutral, and, except in a few special cases, those are two different connections. (MORE)
Probably not, in the case of a three-phase transformer as it has been pre-connected, enclosed in a metal tank, fitted with the appropriate bushings, etc.. However, it is a rel…atively straightforward job in the case of a three-phase transformer bank that comprises three separate, single-phase, transformers. Whether you'll obtain your desired secondary voltage is another matter. (MORE)