This paper describe about simulation of Passive Filter in analysis to reduce harmonics that happened in a load such as vacuum casting induction furnace 9 kW, 13.8 kVA, 200V, 3 Ph, 50/60 Hz, also gives comparison with Hybrid Active Filter and Active Filter which made satisfaction result on the previous research. The best result achieved on the use of Hybrid Active Filter on %ITHD for 4.27 % and %VTHD for 3.83%, while Active Filter gave on %ITHD for 5.14 % and %VTHD for 3.82%. There are 17.23% and 0.44% lower in %VTHD and %ITHD if compared with result achieved by Passive Filter. Both of them are suited with %THD standard. But the result achieved by Hybrid active Filter gave most satisfactory value compared with Passive Filter's for17.65% and 0.43% lower in %VTHD and %ITHD.. Simulation on Passive Filter produced on %ITHD for 22.37 % and %VTHD for 4.26%. In this case, %ITHD standard for applying Passive Filter could not be fulfilled.