This standard applies to the following types of reactors: . shunt reactors; . series reactors including current-limiting reactors, neutral-earthing reactors, power flow control reactors, motor starting reactors, arc-furnace series reactors; . filter (tuning) reactors; . capacitor damping reactors; . capacitor discharge reactors; . earthing transformers (neutral couplers); . arc-suppression reactors; . smoothing reactors for HVDC and industrial application; with the exception of the following reactors: . reactors with a rating less than 3.33 kvar single-phase and 10 kvar three-phase; . reactors for special purposes such as high-frequency line traps or reactors mounted on rolling stock. Where IEC standards do not exist for small or special reactors, this standard may be applicable as a whole or in part.