power voltage and current
IEC 62271 100 high voltage switchgear and controlgear high voltage alternating current circuit
Ngày tải lên :
04/04/2014, 12:34
... High -voltage alternating current circuit-breakers Synthetic testing High -voltage alternating current disconnectors and earthing switches High -voltage switches for rated voltages above kV and less ... less than 52 kV High -voltage switches for rated voltages of 52 kV and above High voltage alternating current switch-fuse combinations High -voltage alternating current contactors and contactor based ... switchgear and controlgear for rated voltages up to and including 38 kV Insulation-enclosed switchgear and controlgear for rated voltages up to and including 52 kV High -voltage/ low voltage prefabricated...
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Past and Current Agent Trends
Ngày tải lên :
05/10/2013, 13:20
... profitability of a technique and whether or not it meets a certain market or user demand (and how well this demand has been met), are becoming major issues now Companies use the Internet and agent-based applications ... education, and are only partially familiar with the possibilities and techniques of networks in general and the Internet and its services in particular; The number of parties offering services and information ... [NRC94] more clearly linked to it), and is almost identical to the aims and (future) possibilities of agent technology and the three layer model: "[ ] creating and inserting an intelligent service...
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SIEMENS SIMATIC power controller and 3 phase stepping motors
Ngày tải lên :
21/11/2013, 13:45
... output READY2 (overload and short-circuit protected): Uhigh 24 V supply voltage Voltage drop V max at 70 mA Output current 70 mA Sustained short-circuit current 0.6 A max Peak current A max for 50 ... reduction (to 60 % at motor standstill) LED status indicators To indicate readiness and any malfunctions (short-circuit between motor phases, supply overvoltage/undervoltage, power controller overtemperature) ... standstill Maximum power loss Intermediate circuit connection 80 W Intermediate circuit voltage 160 V to 485 V DC Open-close cycle (during operation and after fault rectification) >5s Phase current...
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Tài liệu Explaining Ethnic Minority Poverty in Vietnam: a summary of recent trends and current challenges ppt
Ngày tải lên :
12/12/2013, 21:15
... demand and often required capital investment that farmers cannot afford Often models are based on lowland agriculture and are promoted in upland and mountainous areas without prior testing and ... Annual cropland Irrigated annual Perennial cropland Forest land % having land Size1 (m2) % having land2 Size1 (m2) % having land Size1 (m2) % having land Size1 (m2) North East Kinh Ethnic Min 87 ... cropland and forestry land has often been based on the ability to invest in the land with labour and capital Given that poor people, including the ethnic minorities, have a shortage of funds and...
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Tài liệu ime Control of a Three Phase 4 Wire PWM Inverter with Variable DC Link Voltage and Battery Storage for PV Application doc
Ngày tải lên :
19/01/2014, 02:20
... and a volta and nt age drop occurs which distorts the symm d metrical outp voltage To solve this problem th following put T s he measuremen were take m nts en • • a zer sequence current and voltage ... contains the current loop, volt nor tage major lo oop, the DC link referen estimatio C nce on and the DC link voltage control loop Here only a brief desc a p y cription of th current an voltage as ... in figure To control i rd n o and sepa arately the co oupling elem ments b and d are decoupled b the matrix Fdc and AIdc so that d by xes and de epend only on a and c After removin A ng the coupling...
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Tài liệu Industrial Power Engineering and Applications Handbook P2 docx
Ngày tải lên :
19/01/2014, 23:20
... These are series motors and are relatively compact and lightweight compared to an a.c motor The use of such motors is therefore common for hand tools and home appliances and also for such applications ... (Figures 1.25(u2 )and ( b ) )and the other C , , for a , run of a much lower value (so that I C , < Zmj Notes The size of capacitors C, C , or C2 will depend upon the horsepower of the motor and the torque ... the range of 30100 pF and for a run of 2-20 pF will be adequate Whenever frequent switchings are likely, high transient voltages may develop and harm the motor windings and the capacitors Fast...
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Tài liệu Industrial Power Engineering and Applications Handbook P1 docx
Ngày tải lên :
19/01/2014, 23:20
... size of control and LT and HT power cables xvi Introduction Part 111 Voltage surges, overvoltages and grounding practices (including causes, effects and remedies and theory of overvoltages, ground ... useful part for all those handling HV and EHV power systems and their surge and overvoltage protection The part deals with the BIL of a system, protective margins and insulation coordination ... no-load current, power factor and losses may vary in the following proportions, depending upon the type, size and design of the motor: No-load current This may be 25-50% of the full-load current and...
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Tài liệu Aspects considering new and current forms of housing for elderly pdf
Ngày tải lên :
14/02/2014, 07:20
... adequacy of existing norms and institutions that help determine how practicioners use or abuse power, respond to or even resist market forces, work to empower some groups and disempower others, promote ... living at home (easily get assistance the need from family and people who live with them, money saving, Being active and socially connected and engaged, Dependent / independent Two different views ... start of socializing kindergarten: food: how does it smell and taste and where does it come from school: sport: awareness of one own needs and experience benefits of sport; e.g Götzis, Austria: school...
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Tài liệu Power, Politics and Identity in South African media docx
Ngày tải lên :
15/02/2014, 08:20
... identity discourses and political power, between new subjectivities and persisting legacies of apartheid, and between new narratives of nationhood and the increased commercialisation and privatisation ... on which this chapter focuses are: youth and ethnicity, race and class structures, gender and HIV/AIDS, violence, poverty and unemployment, and education and globalisation Before discussing these, ... dodgy ethics and pandering to the lowest common denominator Since then, according to Nicola Jones, Yves Vanderhaeghen and Dee Viney, more critical thought is being given to the impact and importance...
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Tài liệu Afghanistan - State and Society, Great Power Politics, and the Way Ahead docx
Ngày tải lên :
18/02/2014, 01:20
... conference attendees and both the introduction and collection itself have been reviewed and approved by RAND Science and Technology Afghanistan: State and Society, Great Power Politics, and the Way Ahead ... State and Society, Great Power Politics, and the Way Ahead.” The conference was held in Copenhagen and hosted by the Royal Danish Defence College, the RAND Initiative for Middle Eastern Youth, and ... 8 Afghanistan: State and Society, Great Power Politics, and the Way Ahead Table 2.1 RAND Criteria for Success Applied to Afghanistan RAND Success Criteria Requirements Current Commitment/Capacity...
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Tài liệu Power Transmission and Distribution docx
Ngày tải lên :
18/02/2014, 22:20
... proportional to the square of the current, and voltage drop proportional to the current Power factor, then, is the ratio of power (watts or kilowatts) to the product of voltage and current (in volt-amperes ... utilized Power Factor In alternating current circuits, almost always current and voltage will be found out of phase with each other; this relation, together with instantaneous power, and vector ... in voltage is equal to the product of the current flowing through a conductor and its resistance: I current = E voltage from which, E = IR R resistance Energy loss is the product of power and...
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Tài liệu Power sharing and scarcity: determinative economic master narratives pdf
Ngày tải lên :
20/02/2014, 16:20
... Roosevelt, Stalin and Churchill, have to share power to defeat Hitler and Tojo.8 The great meaning of power sharing is titanic and often transnational The tiny meaning of power sharing” concerns ... Hirohito the God; and Mandela the Saint: all of these perforce shared power We have all too quickly forgotten that Saint Nelson Mandela shared power deeply with Thabo Mbeki Mandela was plainly ... Churchill and Thatcher had to decide on who was “one of us” True power sharing gets off the fence It decides who actually rules and with what clear policies Power sharing defines in and out; sets...
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power electronics and motor drives - advances and trends
Ngày tải lên :
05/03/2014, 09:32
... and quadrature axes (also known as a-b axes) f Frequency (Hz) Id dc current (A) If Machine field current IL rms load current Im rms magnetizing current IP rms active current IQ rms reactive current ... emf Vd dc voltage VI Inverter dc voltage Vf Induced emf Vm Peak phase voltage (V) Vg rms airgap voltage VR Rectifier dc voltage vs Instantaneous supply voltage vd Instantaneous dc voltage vf ... Introduction and Perspective FIGURE 1.4 Power electronics applications DC AND AC REGULATED POWER SUPPLIES ELECTRO CHEMICAL PROCESSES HEATING AND LIGHTING CONTROL ELECTRONIC WELDING POWER LINE VAR AND...
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Therapeutic ultrasound as a potential male contraceptive: power, frequency and temperature required to deplete rat testes of meiotic cells and epididymides of sperm determined using a commercially available system doc
Ngày tải lên :
05/03/2014, 17:20
... parameters, and wrote the manuscript; PAD, CMG, RCG, and TSG designed, performed or analyzed in vitro ultrasound experiments, MGO, PAD, GJM and DCS analyzed data and directed Pilot Studies and Study ... necropsies and supervised all animal experiments performed at ILS; EJRS and KGH treated animals, performed necropsies and analyzed sperm All authors participated in experimental design and read and ... †, statistically lower than MHz, high power (Group 3) and MHz, low power (Group 6) by Tukey’s post-test (p < 0.001) Tsuruta et al Reproductive Biology and Endocrinology 2012, 10:7 http://www.rbej.com/content/10/1/7...
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Professions and the public interest Medical power, altruism and alternative medicine pot
Ngày tải lên :
06/03/2014, 09:20
... professions and health care, and teachers and students of social policy, politics, social history and medical sociology It will also appeal to orthodox health care professionals and to practitioners ... Mike Saks is Professor and Head of the School of Health and Life Sciences at De Montfort University, Leicester Professions and the public interest Medical power, altruism and alternative medicine ... Britain 139 Acupuncture and British medicine: the influence of professional power and interests 185 The medical reception of acupuncture in Britain: professional ideologies and the public interest...
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QUANTITATIVE FINANCE: Its Development , Mathematical Foundations, and Current Scope pot
Ngày tải lên :
07/03/2014, 19:20
... A\A = (the empty set), and by convention we suppose that c A and A c A for every A Sets A and B are said to be equal if both A c B and B c A are true, and in that case A\B = and B\A = The natural ... integrable: (1) g+ d p = +x and g- , d p < w; (2) g+ d p < x and g- d p = + x ; (3) J”g+ d p = +m and J g- d p = +co In cases and and , respectively, we put g d p = +x and g d p = -x In case ... standard deviation We often just write E X for the mean and VX for the variance Expanding (X - p)' and applying the linearity property of E show that V X = E X - p2 = p - p The quantities p and...
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