標準號：IS 5553 Pt.5-1989
發布日期：1990/6/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This standard (Part 5) covers tuning reactors. These are reactors in ac systems which are connected with capacitors to tuned filter circuits with responances in the audio frequency range for reducing, blocking or filtering harmonics or communication frequencies. The tuning reactors are connected either in a parallel configuration in the system (with system voltage applied across them) or in a series configuration (with load current flowing through them ).1.1.1 DesignTuning reactors are single-phase or three-phase reactors, oil-immersed or dry type. The reactors may be designed with means for adjusting the inductance value within a limited range by tappings or by movement of core and/or coils. This is subject to agreement and should be mentioned in the enquiry or tender.Tuning reactors for audio frequency signals may be equipped with a second winding connected to the audio frequency source or to other components.When connected in parallel configuration they are subjected to inrush transients at switching operations. When connected in series configuration they are also subjected to overcurrents due to system faults which they will have to withstand under recognized conditions.NOTES1 If three-phase filter circuits are installed, attention should be paid to the magnetic coupling between different reactor phases.2 For non-shielded tuning reactors, due consideration should be given to possible influence by the mounting structure.