• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Document
Document

... 19-11. An electrical system is rated 5 KVA, 120V at a 0.8 lagging power factor. a. Determine the impedance of the system in rectangular coordinates. b. Find the average power delivered to the system. Cancelled 19-15. For the system below: a. Find the total number of watts, volt-amps reactive, and vo ...
Use the equations for electric power to
Use the equations for electric power to

Accurate Power Supply Sequencing Prevents System Damage
Accurate Power Supply Sequencing Prevents System Damage

... Many complex systems—such as telecom equipment, memory modules, optical systems, networking equipment, servers and base stations—use FPGAs and other digital ICs that require multiple voltage rails that must start up and shut down in a specific order, otherwise the ICs can be damaged. The LTC®2924 is ...
MHA100 McIntosh
MHA100 McIntosh

Document
Document

the transformerless single-phase universal active power filter for
the transformerless single-phase universal active power filter for

... The strict requirement of power quality at input ac mains and the output load (sensitive loads) in the area of power line conditioning is very important in power electronics. Different equipments are used to improve the power quality,e.g., transient suppressors, line voltage regulators, uninterrupte ...
Lab #13 Complex Power - Northern Arizona University
Lab #13 Complex Power - Northern Arizona University

4 – The Power BJT 3
4 – The Power BJT 3

EENG 457 Power System Analysis I
EENG 457 Power System Analysis I

... (a) the instantaneous power. (b) the real and reactive power delivered by the source. (c) the power factor at the terminals of the source. 2. A voltage source v(t )  100cos(100 t  60 ) V is connected to an impedance Z  5.030 . (a) Determine the expressions for the current and the instantaneous ...
Glossary - Department of Defence
Glossary - Department of Defence

... Disturbances to electrical power lasting less than one cycle (1/60th of a second for 60-cycle AC). Also referred to as voltage spikes. Can be caused by lightning strikes, sudden load-shedding on the primary power system, and shutdown of equipment that was drawing an extremely large amount of power, ...
MQP20IZM 20kW Generator
MQP20IZM 20kW Generator

Wind Farms without Borders: Top 5 Practices when
Wind Farms without Borders: Top 5 Practices when

... Compromised of a voltage source (DC Capacitor) behind a reactor. • Advantages over SVCs include greater performance at low operating voltages, faster response time, and small form factor • Expensive at higher voltage levels, typically installed on the collector system • Historically more expensive t ...
C270 Stereo Power Amplifier
C270 Stereo Power Amplifier

PP20-SP20_pdf - Acuity Brands
PP20-SP20_pdf - Acuity Brands

... requires 40 mA during the on state. Low voltage remote sensors typically require 3 mA when detecting occupants, and 0.15 mA when in standby. Therefore, each transformer can handle up to 3 relays (including the relay(s) inside the power pack). For example, one PP20 can power its relay (40 mA) and 110 ...
Presentation Title Here
Presentation Title Here

... • Offline AC/DC and Isolated DC/DC Power Supplies • PFC, Phase Shifted Full Bridge, Two Switch Forward, Hard Switching Full Bridge, and Resonant LLC ...
Elements of Power
Elements of Power

Decibel notes
Decibel notes

... For example the power output to power input ratio of an amplifier (Power Gain). The relationship between dB and Watts is: dB = 10 Log10 Watts. To determine the power ‘Gain’ of an amplifier, the ratio of power out to power in is: Power Gain = Power Out / Power In and to express this in dB: dB Gain = ...
Unit 1.3 Power Supplies
Unit 1.3 Power Supplies

Power Quality Measurements
Power Quality Measurements

... Photovoltaic power plant – renewable-based DG: - generate DC power, - have inverters as interface to the distribution system. ...
Power Supply IC for Low Power AC Adapters
Power Supply IC for Low Power AC Adapters

AC-DC LCD TV Power Architecture and LED Backlight
AC-DC LCD TV Power Architecture and LED Backlight

Logis5cs( ELEC327:(Lecture(5( Today( Measuring(current(consump5on(
Logis5cs( ELEC327:(Lecture(5( Today( Measuring(current(consump5on(

Shuttle XPC Accessory PC45G
Shuttle XPC Accessory PC45G

Shuttle XPC Accessory PC45G (250W Power Supply)
Shuttle XPC Accessory PC45G (250W Power Supply)

Chapter 8 Power Supplies
Chapter 8 Power Supplies

< 1 ... 133 134 135 136 137 138 139 140 141 ... 159 >

Standby power

Standby power, also called vampire power, vampire draw, phantom load, or leaking electricity (""phantom load"" and ""leaking electricity"" are defined technical terms with other meanings, adopted for this different purpose), refers to the electric power consumed by electronic and electrical appliances while they are switched off (but are designed to draw some power) or in a standby mode. This only occurs because some devices claimed to be ""switched off"" on the electronic interface, but are in a different state from switching off at the plug, or disconnecting from the power point, which can solve the problem of standby power completely. In fact, switching off at the power point is effective enough, there is no need to disconnect all devices from the power point. Some such devices offer remote controls and digital clock features to the user, while other devices, such as power adapters for disconnected electronic devices, consume power without offering any features (sometimes called no-load power). All of the above examples, such as the remote control, digital clock functions and—in the case of adapters, no-load power—are switched off just by switching off at the power point. However, for some devices with built-in internal battery, such as a phone, the standby functions can be stopped by removing the battery instead.In the past, standby power was largely a non-issue for users, electricity providers, manufacturers, and government regulators. In the first decade of the twenty-first century, awareness of the issue grew and it became an important consideration for all parties. Up to the middle of the decade, standby power was often several watts or even tens of watts per appliance. By 2010, regulations were in place in most developed countries restricting standby power of devices sold to one watt (and half that from 2013).
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report