| 1. |
What are auxiliary CTs? Why are they used? |
| 2. |
What are the advantage of numerical relaying over other relaying schemes in differential protection? |
| 3. |
Show that maximum flux during energization can vary from
 to 3
. |
| 4. |
What are the various restraint schemes used? |
| 5. |
The primary winding of a transformer has 2000 turns and CT ratio is 600:5. The secondary has 10000 turns and is |
| |
working on a tap of 60%. Find out CT ratio required for secondary side to establish circulating current scheme. |
| 6. |
Explain how reliability is obtained by polling scheme in the 'sample by sample' comparison approach for differential |
