From the objective analysis in Table 1, the laboratory sheets that use for student practice learning were designed as 2 sheets. Each sheet is consisted of experimental topics, objectives, experimental tools and devices, experimental circuit, experimental procedures, experimental questions, and conclusion. The experimental topics were divided in 2 topics. The objectives shown in each laboratory sheet can be divided as 2 levels. First level is general objectives that use to indicate what laboratory wants student get understanding in general. Next level is behavior objectives that use to indicate what behavior students can show when study the proposed experimental kit in each laboratory. The experimental tools and devices were detailed what tools and devices are needed in each laboratory sheet. The experimental procedures were used to explain what students have to do while experimenting in each laboratory. The experimental questions and conclusions were used for students summarizing all experimental results in each laboratory sheet. These questions must be designed to have student behaviors following the experimental objectives.
IV. EVALUATIONS
To evaluate the proposed experimental kit, the performance test and student learning achievement were applied. The performance test was done by running the proposed kit following the experimental procedures designed laboratory sheet as shown in Fig.6. The circuit was tested to check their performances that meet the kit requirements or do not.
Fig. 6 Implementation circuit for proposed experimental kit.
The first laboratory sheet requires the experiment of VSD installed motor without passive filter as shown in Fig. 4. The voltage and current measurements were installed to get voltage and current waveforms at measurement point. The generator loads were regulated from 10 to 100% for suggesting behavior of harmonic contents on the input port (on voltage and current