  The low and higher energy limits of the Electroweak Model are obtained from
first principles of gauge theory. Both limits are given by the same contraction
of the gauge group, but for the different consistent rescalings of the field
space. Mathematical contraction parameter in both cases is interpreted as
energy. The very weak neutrino-matter interactions is explained by zero tending
contraction parameter, which depend on neutrino energy. The second consistent
rescaling corresponds to the higher energy limit of the Electroweak Model. At
the infinite energy all particles lose masses, electroweak interactions become
long-range and are mediated by the neutral currents. The limit model represents
the development of the early Universe from the Big Bang up to the end of the
first second.
