[en] The ICRF system for the KSTAR tokamak is being developed to support long-pulse, high-β, advanced tokamak fusion physics experiments. The ICRF system will deliver 12 MW of rf power to the plasma for 300 seconds through two antennas located in adjacent ports. With the frequency range of 25 to 60 MHz, it provides heating for the plasmas, centrally peaked current drive, and off-axis current drive using mode-conversion for various operating scenarios over a range of magnetic fields. Steady-state relevant ICRF components have been developed in the area of the antenna, the vacuum feedthrough and the matching devices. In this work, rf test results with intermediate power at the frequency of ∼30 MHz are presented