1.) A three phase transformer having a line voltage ratio of 400/33000 v is connected in the star-delta. The cts on the 400v side have a ct ratio of 800/5. What must be the ratio of cts on the 33000 side?
Three-Phase Transformers
Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.
Transformer
Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.
1.) A three phase transformer having a line voltage ratio of 400/33000 v is connected in the star-delta. The cts on the 400v side have a ct ratio of 800/5. What must be the ratio of cts on the 33000 side?
2.) A 100 mva delta/wye connected, 11/220 kv transformer is to be protected by percentage differential scheme ct used are of ratio 6000:5 and 300:1 respectively. Relays are rate yp to 1A. Determine the current at ICTHV
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