Time-domain modelling of frequency-dependent line series resistance by a discrete lumped equivalent circuit is useful for simulation, either on a digital computer or on a transient network analyzer. A resistance model that is suggested by Wheeler (1) for resistance of a lossy coaxial communication cable with ideal square-root frequency-dependent losses is adapted to model resistance of a three-phase power line with earth return. The model is solved using the trapezoidal rule with damping, which is accurate and numerically stable even for large values of time step Δt, as used in simulation of power system transients. The model is simple, accurate, computationally fast, and it can be directly interfaced with an electromagnetic transient program.