1. Transformer overload;

2. Ukuxhumana okungalungile kwangaphakathi kwe-transformer, ukukhipha kanye nokuvutha;

3. Izingxenye ngazinye ze-transformer zixega;

4. Kukhona isisekelo noma isifunda esifushane ohlelweni lwe-transformer;

5. Ukuqala kwenjini enkulu kwenza umthwalo ushintshe kakhulu.