In an industrial project, the customer decided to change first order for new power transformer. According to new order, the rating power of transformer should be half. He enquired new detail cost table and transformer manufacturer submitted it. Future power transformer user cheeked that mentioned list; he noted all detail items cost decreased approximately except bushing current transformers costs. He can not understand the reason of this cost impact
How can you explain the reason of BCT cost increasing due to its turn ratio decreasing?
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