1.1 This standard (Part 4) covers damping reactors which are used particularly for limiting the inrush currents occuring during the switching of capacitor banks to ac networks. They are connected in series with the capacitors.
During normal operation the capacitor rated current flows through the damping reactors. The maximum permissible ( overload ) current of the damping reactor is equal to the corresponding value of the capacitor bank as called for in the relevant standards for power ( shunt) capacitors.
NOTE — For special capacitor applications, such as in static var sources or HVDC systems the currents as specified in the power capacitor standards are not always applicable.
1.1.1 Damping reactors are usually single or three-phase, dry type natural (self) cooled, without iron core, for indoor or outdoor installation.
IS 5553 Pt.4-1989 history
1990IS 5553 Pt.4-1989 Reactors—Specifications Part 4 Damping Reactors