The transformation ratio of the current transformer in the medium-voltage cabinet is different from that of the current transformer in the low-voltage cabinet
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The transformation ratio of the current transformer in the medium-voltage cabinet is different from that of the current transformer in the low-voltage cabinet. For example, one is 500:5 and the other is 250:1. What kind of problems might arise in this case?
Whether it is 500:5 or 250:1, the secondary meter displays a single value; the result corresponds to that single value. It’s just that the range of the secondary meter is different, but the effect on measurement remains the same.
Thank you for the reply! May I ask, are there any disadvantages to this design? Would it be better to standardize it across the entire plant?
Secondary meters are divided into two categories: 5A and 1A. For new projects, it is recommended to use a standard specification; either one can be chosen； If it is a renovation of an existing factory, the original design can be followed.
The secondary side has a larger capacity of 1A
It is a new project, with the high-voltage side and the low-voltage side being designed by two different design institutes. There is currently a problem with inconsistent secondary side current transformers. Although there won’t be any major problems, from the owners’ perspective, they still hope for standardization. If standardization is required, is it better to choose 5A or 1A?