Can any one suggest me which IEEE/ANSI Standards give brief description / worked examples to calculate knee point voltage and to select the required CT 'C' Voltage for pilot wire line differential protection for Medium Voltage (15kV) underground cables..?
Will the CT 'C' voltage selection be...
Thanks Stevenal...Table-1 given in the same IEEE C37.110 matches with your reply. Since most of the CTs either connected in delta or wye at the CT itself, the return path resistance need not considered for symmetrical faults.
Also found the answer for the CT burden given in the worked example...
I have few queries regarding CT accuracy class selection for Transformer differential protection as per IEEE C37.110-1996.
IEEE C37.110's worked example indicates that only one way CT lead(cable)resistance shall be considered for total burden calculation. Where as IEC/European standards...
Folks,
I am currently preparing datasheet for LV Motors for our ongoing south american country Peru. The type of project is oil and gas project. The site conditions are as follows:
Site extreme dry bulb temperature: 29 dec.C (max) and 11 dec.C (min)
Relative humity, %: 95 % (max) and 60...
I do agree with Dapotiti18.Since the load is motor obviously you may not require neutral point supply...However, considering future single phase supply requirement such as lighting, you can go for 2400 (Delta) /480-277(Y)transformer.
