• 열병합발전
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• s.56
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• pp.4-8
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• 2007

• 열병합발전
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• s.57
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• pp.4-10
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• 2007

• JOURNAL OF ELECTRICAL WORLD
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• s.349
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• pp.12-13
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• 2006

• Electrical & Electronic Materials
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• v.26 no.5
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• pp.21-29
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• 2013

• 열병합발전
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• s.77
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• pp.4-12
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• 2010

• NEWSLETTER 전기공업
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• no.93-20 s.93
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• pp.11-16
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• 1993

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.1021-1022
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• 2010

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2012.06a
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• pp.47-48
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• 2012

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.8
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• pp.1423-1428
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• 2010

The results of off-line and on-line diagnostic tests performed on the stator winding of an air-cooled gas turbine(G/T) generator are reported in this paper. Off-line diagnostic tests included measurements of the ac current, dissipation factor(tan${\delta}$), and partial discharge(PD). Six epoxy-mica capacitors were installed in the three phases of G/T generator for performing on-line diagnostic testing with the turbine generator analyzer(TGA). The TGA showed that the normalized quantity number(NQN) and the PD magnitude($Q_m$) were high in phase A of the stator winding. Internal discharges were generated in phases B and C, and slot discharge occurred in phase A. According to the trend analyses of the NQN and $Q_m$ values available for insulation condition assessment for G/T generator stator windings, it was concluded that phases B and C were in good condition, whereas phase A has been significantly deteriorated.

• Journal of the Korean Orthopaedic Association
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• v.55 no.3
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• pp.193-199
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• 2020

A gamma nail has been used to treat intertrochanteric fractures since 1988. Although such cephalomedullary nails have mechanical advantages over extramedullary fixation devices, such as sliding hip screw, their beneficial effects on treating the Arbeitsgemeinschaft für Osteosynthesefragen/Orthopaedic Trauma Association (AO/OTA) 31-A1 and 31-A2 fractures are still controversial. During their 30-year history, many problems have been overcome, and new types of cephalomedullary nails have been introduced in clinical practice. New cephalomedullary nail systems facilitate nailing procedures and enhance the purchase capability of the femoral head by a lag screw. On the other hand, the failure rate still depends on the hands of the orthopedic surgeons. This review article focused on the basic principle of medial support and restoration of a medial buttress during the treatment of trochanteric fractures using a cephalomedullary nail.