We presented here the fluctuation induced excess conductivity in Bi 1.7 Pb 0.3 Sr 2 Ca 2-x Y x Cu 3 Oy superconductors with various x values (0.00< x< 0.50). The logarithmic plots of excess conductivity (∆ σ) and reduced temperature (ε) reveal three different values of the order parameter dimensional exponents against a decrease of temperature corresponding to two different values of crossover temperatures. In the critical field region, the order parameter exponents are two dimensional (2D) as x increases up to 0.20, but it is changed to three dimensional (3D) with further increase of x up to 0.50. While, the order parameter exponents are not systematic with Y in both normal and mean field regions, and they are fluctuated between zero dimensional/short wave (0D/SW), qusi-2D, qusi-1D and 3D. On the other hand, the coherence lengths, inter-plane spacing, interlayer coupling, GL parameter and anisotropy are calculated and their values are generally increased by increasing x up to 0.50, whereas GL parameter, Ginsburg number, critical magnetic fields and critical current density are decreased. The possible reasons for the above findings are also mentioned.