when two transformers satisfy the turns ratio is it possible

when two transformers satisfy the turns ratio, is it possible to connect these two transformers in parallel. Justify your answer

Solution

For supplying a load in excess of the rating of an existing transformer, two or more transformers may be connected in parallel with the existing transformer. The transformers are connected in parallel when load on one of the transformers is more than its capacity.

The reliability is increased with parallel operation than to have single larger unit.

The cost associated with maintaining the spares is less when two transformers are connected in parallel. It is usually economical to install another transformer in parallel instead of replacing the existing transformer by a single larger unit.

The cost of a spare unit in the case of two parallel transformers (of equal rating) is also lower than that of a single large transformer. In addition, it is preferable to have a parallel transformer for the reason of reliability.

The turns ratio test is performed on all taps of every winding. The Transformer Turns Ratio tester (TTR) is device used to measure the turns ratio between the windings (example shown below). Voltage is applied on the H marked leads and measured of the X marked lead by the test set.