A fully operational digital protective relay or Intelligent Electronic Device are provided for protecting electrical equipment of a power distribution system. The end parts of the first guide shaft supporting member and second guide shaft supporting member on the side of the guide shaft are connected to the guide shaft in the horizontal direction or downward from the horizontal direction orthogonal to the up-down direction with respect to the guide shaft. The copolyetheresters are produced from a mixture of aromatic dicarboxylic acids, hydroxyalkanoic acids, a poly glycol, a glycol component, optional other glycol, optional branching agents, and optional color reducing agent components. The system also includes means for heating, vaporizing and controlling the temperature and proportions of the components. The MS is arranged to identify bursts from the BTS which may comprise information for the MS by identifying if a Training Sequence Code, a TSC, which is comprised in received bursts corresponds to a TSC which the MS has been assigned, the MS being arranged to be assigned a first and a second TSC to be used for at least one of said modulation types.