INVESTIGASI TEGANGAN LEBIH TRANSIEN AKIBAT SAMBARAN PETIR PADA GARDU INDUK 150 KV

ABSTRACT:Electrical energy is the essential things that we need in any aspect of the like industry, hospital, school, etc. Therefore, the transmission of electrical power has to be reliable and continuous. However, those ideal condition is hard to achieve in daily basis because if disruption like lightning impulse. Arrester is a device that prevents or stops overvoltage disruption. In this research, two kinds of arrester are compared and modeling substation devices using simulation software ATPDraw. The simulation result shows us that the Q150NA121A arrester has outstanding performance with an overvoltage value of 454 kV. In the other side, Q150NB121A arrester has overvoltage value at 579 kV.ABSTRAK:Energi listrik merupakan kebutuhan yang sangat penting pada setiap sektor seperti pendidikan, industri, rumah sakit, dan lain-lain. Oleh sebab itu penyaluran energi listrik diharapkan memiliki kontinyuitas dan kehandalan yang tinggi, namun dalam praktiknya hal tersebut sulit tercapai disebabkan karena berbagai macam gangguan salah satunya gangguan tegangan lebih impuls petir. Arester adalah peralatan yang saat ini banyak digunakan secara luas untuk mengurangi dan mencegah gangguan tegangan lebih. Pada penelitian ini dua tipe arester dibandingkan serta memodelkan peralatan yang ada pada gardu induk dengan menggunakan simulasi ATPDraw. Hasil simulasi menunjukkan bahwa arester tipe Q150NA121A mempunyai kinerja yang sangat baik dengan nilai tegangan lebih sebesar 454 kV. Sedangkan untuk arester tipe Q150NB121A nilai tegangan lebih sebesar 579 kV.

Implementation of Vendor Managed Inventory (VMI) in Managing Intra Ocular Lenses (IOL) in Eye Care Organization

Nowadays healthcare has a completely changed scenario as compared with the early 90’s. As more and more profit generating hospitals are coming in the industry, hospital and healthcare is no longer remains a charitable or philanthropically act. So to be remain in the market and compete within hospitals need to now focus on the different and innovative strategies in every aspect. Supply chain and operations is one of the important key of any organization which directly impact on business and revenue. Vendor Managed inventory is not a new concept but it is not efficiently utilized in service and healthcare industry as of now. Some retail and automobile industries has utilized the concept and also able to reduce the inventory cost with manageable position of stock out and over stocking position. As hospital’s key functioning is to deal with life of patients on day to day so position of material need to be necessarily on right time and right place. This paper is based on the insight of the application of vendor managed inventory in the management of inventory for the IOL (Intra ocular lenses) that is used for the surgeries in the eye hospital. We will also study the questionnaire on the acceptability of the concept of vendor managed inventory in the hospital that will help to assess the acceptability of VMI in hospital and healthcare industry. Also a framework matrix is designed to understand the relation of VMI with the revenue earning and smoothening of operational efficiency.