White Paper #1 The Different Types of UPS Systems Revision 5 By Neil Rasmussen 2003 American Power Conversion. All rights reserved. No part of this publication may be used‚ reproduced‚ photocopied‚ transmitted‚ or stored in any retrieval system of any nature‚ without the written permission of the copyright owner. www.apc.com Rev 2004-5 2 Executive Summary There is much confusion in the marketplace about the different types of UPS systems and their
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Microwave Transmission Basics Microwave Transmission Basics Table of Contents • MW Advantages • MW Frequency bands • MW Link elements • Antenna Radiation Pattern • MW Alarms Microwave Transmission Basics Features Advantages Rapid Deployment – A microwave link can be installed in as little as one day No right-of-way issues – Radio spans all obstacles such as roads‚ railways‚ etc.‚ avoiding any requirement to seek permissions that inevitably are costly and introduce time delays
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of European settlement began it was not until the 19 century when new technological advances that allowed steel industry to produce tons of steel for cheap. One of technology advances that made it possible to produce more steel was Bessemer converter which was invented by Henry Bessemer. “His machine‚ the‚ blew air over molten iron from a blast furnace so as to remove impurities and create a substance of a uniform consistency(Rees‚ Jonathan).” But steel was not produce in mass amount until Andrew
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EE 2403 SPECIAL ELECTRICAL MACHINES 2 MARKS UNIT-I - SYNCHRONOUS RELUCTANCE MOTOR 1. What is synchronous reluctance motor? A reluctance motor is a type of synchronous electric motor which induces non-permanent magnetic poles on the ferromagnetic rotor. Torque is generated through the phenomenon of magnetic reluctance. 2. Define the characteristics of synchronous reluctance motor. The synchronous reluctance motor is not self starting without the squirrel cage. During run up it behaves as an induction
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Product ammonia flow rate(1000 NM3/hr) JFCL HYSYS Model 1078 1080 Product ammonia percentage 99.34 95.26 H2/N2 after shift converter 2.896 2.806 PRF outlet temperature (°C) 796 807.4 Source: Real plant data obtained from Jamuna Fertilizer Company Ltd‚ Jamalpur 8 Response of the Simulation Model to Changes in Process Variables Effect of 5% change in Converter Feed
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1488 IEEE TRANSACTIONS ON POWER ELECTRONICS‚ VOL. 25‚ NO. 6‚ JUNE 2010 Space Vectors Modulation for Nine-Switch Converters Seyed Mohammad Dehghan Dehnavi‚ Student Member‚ IEEE‚ Mustafa Mohamadian‚ Member‚ IEEE‚ Ali Yazdian‚ Member‚ IEEE‚ and Farhad Ashrafzadeh‚ Senior Member‚ IEEE Abstract—Recently‚ nine-switch inverter and nine-switch-zsource inverter have been proposed as dual output inverters. In this paper‚ the space vector modulation (SVM) of nine-switch inverter and nine-switch-z-source
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device is used to do so? Computer can understand only digital data in the form of 1’s and 0’s. So in order to process it. It has to be converted from analog into digital form with the help of analog Digital converter. To convert data from digital to analog a device (digital to analog converter) is required. 5) How to secure data network. Explain minimum two ways. 1) Firewall: A firewall blocks unauthorized connections being made to your computer or LAN. Normal data is allowed through the firewall
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ard Synopsis Title: GSM Based Notice Board Introduction Now a days every advertisement is going to be digital. The big shops and shopping centers are using the digital moving displays now. In Railway station and bus stands everything that is ticket information‚ platform number etc is displaying in digital moving display. But in these displays if they wants to change the message or style they have to go there and connect the display to PC or laptop. Suppose the same message if the person
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that the output wave shape of the DC voltage is very smooth and the value is almost 5.01 V. Introduction A power supply is a device that supplies electric power to an electrical load. The term is most commonly applied to electric power converters that convert one form of electrical energy to another. An AC-DC power supply converts alternating current (AC) into the direct current (DC). In general most consumer electronic devices such as desktop computer‚ mobile phone require a low DC power
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electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog to digital converter. Voltmeters are made in a wide range of styles. Instruments permanently mounted in a panel are used to monitor generators or other fixed apparatus. Portable instruments‚ usually equipped to also measure current and resistance in the form of a multimeter
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