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Can we use a low voltage current transformer for a medium voltage application?

If the CT will be installed directly on medium voltage busbars, accordingly it must have an insulation level at least equal to that of the system/cubicle. However, if install a toroidal CT will be installed on the medium voltage cable (which is already insulated), in this case the CT can be a low voltage type (e.g. insulated 0.72kV).
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