  The Coulomb interaction between the two protons is included in the
calculation of proton-deuteron breakup and of three-body electromagnetic
disintegration of ${}^3\mathrm{He}$. The hadron dynamics is based on the purely
nucleonic charge-dependent (CD) Bonn potential and its realistic extension CD
Bonn + $\Delta$ to a coupled-channel two-baryon potential, allowing for single
virtual $\Delta$-isobar excitation. Calculations are done using integral
equations in momentum space. The screening and renormalization approach is
employed for including the Coulomb interaction. Convergence of the procedure is
found at moderate screening radii. The reliability of the method is
demonstrated. The Coulomb effect on breakup observables is seen at all energies
in particular kinematic regimes.
