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4042 autotransformer kva products are offered for sale by suppliers on Alibaba.com, of which transformers accounts for 93%, mv&hv transformers accounts for 3%, and low voltage transformers accounts for 2%. A wide variety of autotransformer kva options are available to you, such as high frequency, control and low frequency.You can also choose from black, white and red autotransformer kva,