  We experimentally investigate spin-polarized electron transport between a
permalloy ferromagnet and the edge of a two-dimensional electron system with
band inversion, realized in a narrow, 8~nm wide HgTe quantum well. In zero
magnetic field, we observe strong asymmetry of the edge potential distribution
with respect to the ferromagnetic ground lead. This result indicates, that the
helical edge channel, specific for the structures with band inversion even at
the conductive bulk, is strongly coupled to the ferromagnetic side contact,
possibly due to the effects of proximity magnetization. It allows selective and
spin-sensitive contacting of helical edge states.
