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Electric S-brane solutions with two non-composite electric branes and a setof l scalar fields are considered. The intersection rules for branes correspondto Lie algebras A_2, C_2 and G_2. The solutions contain five factor spaces. Oneof them, M_0, is interpreted as our 3-dimensional space. It is shown that thereexists a time interval where accelerated expansion of our 3-dimensional spaceis compatible with a small enough variation of the effective gravitationalconstant G(\tau). This interval contains \tau_0, a point of minimum of thefunction G(\tau). A special solution with two phantom scalar fields is analyzedand it is shown that in the vicinity of the point \tau_0 the time variation ofG(\tau) (calculated in the linear approximation) decreases in the sequence ofLie algebras A_2, C_2 and G_2.

Electric S-brane solutions corresponding to rank-2 Lie algebras: acceleration and small variation of G