Final answer:
Two transformers with ratings of 20kVA and 10kVA can supply a combined load of 30kVA, but the load should be distributed proportionally to avoid overloading the smaller transformer.
Step-by-step explanation:
When using two transformers with different kVA ratings to supply a combined load, the transformer with the higher kVA rating will typically be able to handle more of the load compared to the one with a lower rating.
In this case, the transformers have kVA ratings of 20kVA and 10kVA respectively. If they are supplying a combined load of 30kVA, in an ideal situation without any losses or restrictions, the transformers can handle the load since their combined ratings equal the required load. However, it is important to distribute the load proportionally to avoid overloading the smaller transformer. The 20kVA transformer would ideally handle two-thirds of the load, while the 10kVA transformer would handle one-third of the load to prevent overloading.
When two transformers are utilized with a combined load of 30kVA and the transformers have kVA ratings of 20kVA and 10kVA, the transformer with a higher kVA rating will provide more power to the load. In this case, the transformer with a kVA rating of 20kVA will provide 20kVA of power to the load, while the transformer with a kVA rating of 10kVA will provide the remaining 10kVA of power to the load.