ABSTRACT

Despite the fact transformer is a highly efficient machine with very small losses, thus the input power is almost equal to the output power, the reason being that it has no moving parts and therefore no friction or winding losses. The transformer trainer is a very valuable piece of equipment in the electrical power machine laboratory in the Electrical engineering Department in the tertiary institutions to reach and demonstrate the principle of operation and applications of the single phase transformer. It is a universal and versatile equipment. The trainer is not constructed to demonstrate on any particular transformer with a particular winding style or particular core arrangement. Rather, any single phase transformer can be demonstrated or tested on it provided that the test load current and voltage values do not exceed the current and voltage ratings of the instruments to avoid damages. You can test and demonstrate any single phase transformer up to .but not exceeding 4KVA. Students can easily and freely test their own transformer projects and assess their performance. Also students can test two or more transformers of the same rating but different winding and core arrangement to learn the effect such construction features may have on the performance and efficiency of the transformer. Some of the test and experiments that can be conducted on the transformer trainer include polarity test, test on no-load and loaded conditions, open circuit and short circuits tests. Experiments on voltage regulations and efficiency of the single phase transformer, and much can also be carried out.