An arrangement comprising at least one electrical voltage source and one first voltage converter circuit with an output and an input. For example, an element that is a field within a structure that points to an abstract image BP within a skeletal framework component may conceptually correspond to a simple element that is a concrete image B within some intended framework payload. ; a reactant to reduce the emission of at least one combustion product in the flue gas; and a plurality of secondary air injection ports downstream of the circulating fluidized bed for providing mixing of the reactant and the flue gas in the furnace above the dense bed, wherein the amount of reactant required for the reduction of the emission of the combustion product is reduced. The locking legs each has an outwardly projecting hook for engaging within the base to lock the cable in its terminated position.