Abstrak: Seiring berjalannya waktu, kondisi fasilitas yang digunakan untuk membantu proses produksi pada PT. Raja Ampat Indotim mengalami penurunan kemampuan dan fungsi akan mengakibatkan kerugian, salah satu sering yakni mesin bubut konvesional. Namun, tindakan perawatan dilakukan di dinilai masih kurang efektif, dikarenakan perawaatan dengan mengadakan setelah terjadinya kerusakan semua kompo...

This paper presents measurements of the motion amplitudes from flexibly supported Herringbone Grooved Journal Bearing bushings. Measurements taken in four locations on bearing bushing enable distinction between radial and tilting motion, which allowed to identify an unstable mode. The instability can be attributed cross-coupled impedance gas its occurrence is characterized by appearance a sub-s...

HV bushings are an important part of the equipment large power transformers, responsible for their many serious (including catastrophic) failures. Their proper exploitation needs to apply correct and reliable diagnostics, e.g., use dielectric response methods, that take into account specific construction working conditions. In this article, based on laboratory tests carried out a real bushing, ...

In developing countries locally-made low-cost prostheses are mainly used in limb-salvage surgery to alleviate the economic burden. We retrospectively collected data on 104 patients treated by limb-salvage surgery between July 1997 and July 2005. We used a locally-designed and fabricated stainless-steel endoprosthesis in each case. Oncological and functional outcomes were evaluated at a mean fol...

The applicability of flowdrill technology to join steel and aluminum alloys is studied. When used two overlapped thin-walled materials, a joint formed as secondary effect. quality the resulting bushings forming interference fit was investigated by metallography. joints were using combination uncoated deep drawn steel, galvanized high-strength low alloy alloy, in different positions joint. Subse...

Insulation breakdown of dry-type valve-side bushing cores under electrothermal compound stress has become a key factor limiting the safe and stable operation converter transformer. Based on slices real core, it is observed for first time that fold, peeling off, fracture defects exist near aluminium (Al) foil edge, accompanied by many metal spikes with curvature radius <4 μm. Coupled capacitor s...