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\begin{document}
%\[ \]



\begin{table}[pt]
\centering
\caption{Short circuit current and backup relays in basic and proposed structures}
\label{tab-2}
\scalebox{0.8}{%

\begin{tabular}{|c|c|c|c|c|}
\hline
\multirow{2}{*}{} & \multicolumn{3}{c}{Basic Proposed} &  \\
\hline 
Line number&	bus send&	bus receiver&	Short circuit current&	Line number with backup relay\\
\hline
%\cellcolor{blue!40!white}
1 &1&	2&	4140.855&	NaN\\\hline
2&	2&	3&	4134.487&	1\\\hline
3&	3&	4&	4125.173&	2\\\hline
4&	4&	5&	4117.107&	3\\\hline
5&	5&	6&	4104.216&	4\\\hline
6&	6&	7&	4093.47&	5\\\hline
8&	8&	9&	4038.834&	33\\\hline
10&	10&	11&	4036.956&	11\\\hline
11&	11&	12&	4041.179&	35\\\hline

\end{tabular}
}
\end{table}



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