  SU(3) gauge theory in the nonlinear gauge of the Curci--Ferrari type is
studied. In the low-energy region, ghost condensation and subsequent gauge
field condensation can happen. The latter condensation makes classical gauge
fields massive. If the color electric potential with string is chosen as the
classical gauge field, it produces the static potential with the linear
potential. We apply this static potential to the three-quark system, and show,
different from the $Y$-type potential, infrared divergence remains in the
$\Delta$-type potential. The color electric flux is also studied, and show that
the current which plays the role of the magnetic current appears.
