Guide Line to Size a Current Transformer from Siemens. This is good presentation of the CT applications and CT sizing guideline.Full description
CALCULATION SHEETS
LIST OF CONTENTS
1.0
OBJECTIVE
2.0
INPUT/BASIS
3.0
CALCULATIONS
4.0
CONCLUSION
APPENDIX – A: 33 kV C T & VT SIZING CALCULATIONS APPENDIX – B: 11 kV CT & VT SIZING CALCULATIONS APPENDIX – C: RELAY LIST
2
CALCULATION SHEETS
1.0
OBJECTIVE
The objective of this calculation is to size the Current and voltage transformer for Protection and Metering application of 33kV GIS & 11kV AIS switchgear at Al Mazyunah primary station. 2.0
INPUT/BASIS
2.1
Power Transformer data for 20MVA transformer feeder is c onsidered from single line diagram.
3.0
2.2
Relay Make & Type are as per the Relay List from Vendor.
2.3
Contract Specifications.
CALCULATIONS
3.1 4.0
For detailed CT & VT sizing calculations, refer to Appendix-A & B.
CONCLUSION
4.1
Calculated CT and VT core parameters are tabulated in Appendix-A & B. Contractor shall provide these CT and VT parameters to the manufacturers for proper design of CT and VT.
4.2
Final CT and VT parameters as provided by vendor shall be provided for AIEC review and confirmation.
