Model 5ZER | Zero Sequence Current Transformer

Models: 5ZER | 5ZERC


The Model Series 5ZER are rugged split or solid current transformers made to customer requirements. When a ground fault occurs, the ground current (a zero-sequence current) in each of the three phases (and the neutral) is additive in the primary circuit, which means that the CT will measure ground current directly, and without influence of differences in the phase CTs. When the system is grounded through an impedance, an alternative method is needed to sense ground current. It is essential that each set of three-phase cables and the corresponding ground cables pass through a single, zero-sequence CT.

    Refer to data sheet below

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