Studi Kelayakan Gas Insulated Switchgear di PT. Paiton Operation & Maintenance Indonesia Unit 8

Protection systems are a collection of components that have the same purpose to protect or secure. One of the existing protection systems in the generator is switchgear. At PT. Paiton Operation & Maintenance Indonesia Unit 8 using a switchgear insulated with SF6 gas is called gas insulated switchgear. Gas Insulated Switchgear is the newest of the switchyard innovations. Innovations that have been developed from air insulation into gas insulation have fewer land use advantages and a better level of density. In determining the feasibility of gas insulated switchgear PT. Paiton Operation & Maintenance Indonesia performs tests consisting of insulation resistance measurements, resistance measurements, gas leakage checks, polarity checking, gas density detectors, testing duration closure and circuit breaker opening. Each test has a pre-defined value limit. Gas Insulated switchgear is said to be feasible to operate when it meets the specified value limits on each test.

Synthesis and Characterization of Surfactant Capped Copper Nanoparticles Using Natural Vitamin

Copper nanoparticles (CuNPs) have captivated amazing and renewable interest in recent years due to their fascinating features. In present investigation, CuNPs were produced by reducing copper sulphate with ascorbic acid (vitamin C) in aqueous medium without inert gas insulation at low temperature (80 ºC). In present synthetic procedure, a native vitamin C was applied as insulating agent to prevent oxidation of nascent CuNPs during the process and in storage. Triton X-100 was added that worked both as a size controller and as a capping agent. The CuNPs were characterized by UV-visible and FT-IR spectroscopies, powder X-ray diffraction (PXRD) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX). Optical properties of Cu nanoparticles were explored using UV-vis spectroscopy. FT IR was employed to uncover the bonding between copper nanoparticles and Triton X-100. The CuNPs were discerned by PXRD and SEM-EDX Techniques. From the major diffraction peaks, the average particle size is determined using Debye-Scherer equation and it is found to be about 15 nm. It is hoped that the present results would pave a way for developing plans for the production of nascent CuNPs in the absence of inert gas insulation.