What is the difference between a current transformer and a zero sequence current transformer?
Release time:
Sep 27,2021
Source:
What is the difference between a current transformer and a zero sequence current transformer?
1. The current transformer is different from the zero sequence current transformer. The zero sequence current transformer is used to detect the zero sequence current. Generally, all three live wires pass through the inner hole of the transformer to measure the vector sum of the three-phase current, that is, the zero sequence current.
2. The characteristics of zero-sequence current determine that under normal circumstances, the primary current of the zero-sequence current transformer is very small, but under abnormal circumstances, the zero-sequence current will also be very large.
3. Since the zero sequence current transformer usually passes through three live wires, the inner hole of the zero sequence transformer is larger under the same primary current. "Inner hole diameter" is an important index of zero sequence transformer.
4, Huai indeed level is lower. In daily life, we don't often see the current transformer, but it covers a lot of places, but also its existence. As a special transformer, the working principle of current transformer is similar to that of transformer. The difference is that in the core of the transformer, the alternating main magnetic flux is generated by the current of the alternating voltage applied to both ends of the primary winding. The alternating main magnetic flux in the core induces a corresponding secondary electromotive force and secondary current in the secondary winding of the current transformer. Since the primary winding and the secondary winding of the current transformer are made in the same iron core, they are linked by the same alternating main magnetic flux, so the current and turns product of the primary winding and the secondary winding should be equal in value.
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