The generating characteristics of resistance in a Bi2223 bulk used for fault current limiter were investigated. We supposed that the fault current limiter with the Bi2223 bulk was installed to a 6.6 kV distribution system and calculated the time variation of the resistance generated in the bulk during the current limiting period. In the analysis, a very good cooling condition (Case 1) and adiabatic one (Case 2) were assumed. In Case 1, the resistance generated in the Bi2223 bulk is flux flow resistance which depends on the instantaneous value of the current through the bulk. Under the condition of Case 2, the normal resistance, which is affected by the joule heat induced in the bulk, is mainly used to suppress the fault current as well as the flux flow resistance. As a result, the relation between the limiting effect on the fault current and volume of the bulk was shown in concrete form of numerical data. The bulk of relatively large volume is required to use in Case 1. This means that the limiting ratio of the peak value of the fault current must be large under the condition of Case 1. On the other hand, when we use in Case 2, we must use the bulk having small volume resulting small limiting ratio.