• Study Resource
  • Explore Categories
    • 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
three phase transformers three phase system basics
three phase transformers three phase system basics

Mohamed Moenes Mohamed Salama _PAPER_03 ESTIMATING
Mohamed Moenes Mohamed Salama _PAPER_03 ESTIMATING

... These limits are, generally, related to the problems of thermal loading and transient stability. Modern control and protection equipment have raised the transfer limits in stability limited systems. However, as the operating conditions for large power systems have evolved, a new type of problem has ...
Electromagnetic Induction
Electromagnetic Induction

... In the writing process, information is firstly converted into an a.c. signals. The a.c. magnetize and rearrange the grains on the platter in as certain pattern as the patter passes over the head. In the reading process, the magnetic field of the grains induces a certain a.c. in the head as the platt ...
Current Mode Control Techniques for the Reduction of THD
Current Mode Control Techniques for the Reduction of THD

... sort of input current shaping for single-phase equipment. proposed for current-mode control in DC-DC converters. Active current shaping is usually used in the power range Most of these techniques rely on mathematical models of the around 2 kW in order to reduce the volume of the converter, power con ...
Testing Power Sources for Stability
Testing Power Sources for Stability

LT1585(A)-1.5 - Linear Technology
LT1585(A)-1.5 - Linear Technology

... frequency components that the output decoupling network must handle until the regulator throttles to the load current level. Capacitors are not ideal elements and contain parasitic resistance and inductance. These parasitic elements dominate the change in output voltage at the beginning of a transie ...
App Note 500 - Calculating Capacitor Charge Time - TDK
App Note 500 - Calculating Capacitor Charge Time - TDK

... power supply rated voltage (Vrated) will be the same, but it is important to use equation 1 if the load is charged to a voltage less than the power supply rating, otherwise an incorrect charge time will be calculated. ...
– Chapter 6 – Precautions for use
– Chapter 6 – Precautions for use

... • An alarm signal (typ = 4 ms) is generated when the power supply voltage is lower than UV protection level during startup of the power supply. The alarm signal is stopped after typ = 4 ms. But input signal is ignored unless the root cause of the protection is settled. An input signal is accepted wh ...
FT-2800M - Yaesu.com
FT-2800M - Yaesu.com

... of power along with Yaesu's renowned bullet-proof receiver front end. Direct keypad frequency entry, Alpha-Numeric Memory System, the high power output, and unsurpassed ergonomics make the FT-2800M an operator’s dream come true! ...
Saftronics Inc.
Saftronics Inc.

... *3 Voltages greater than the source voltage cannot be output. *4 Amperage values in parentheses ( ) are applicable to operation with 3 kHz or lower carrier frequencies (F26 = 3 or less). These values also apply when the ambient temperaute is below 40°C . *5 Tests at standard load conditions (85% loa ...
BP5718A12
BP5718A12

... The capacitance of C3 should be 10µF, since an excessively small value will result in malfunction. The activation time is defined as: t(sec)=R2�C3�ln[1-17/(VI-30µA�R2)], where VI is the DC voltage after smoothing. The resistance of R2 should be 1.5MΩ, since an excessively small value will result in ...
PDF
PDF

... was increased by changing the wafer properties, and because (2) longer RESURF isolation length and (3) optimized field plate structure were achieved by changing the pattern layout. To further stabilize the surface potential across the RESURF isolation region, the conventional multiple floating field ...
A Method to Enhance Ground
A Method to Enhance Ground

... employed the approach to analyze the fault current data recorded at Taipower in the year of 2008. Both SLG and 3SC faults occurred at 161 kV side of primary transmission system have been extensively surveyed. Table I and II list the fault data, where E/S, P/S and D/S individually stand for extra hig ...
Latch-Up - Texas Instruments
Latch-Up - Texas Instruments

... the influence of Latch-Up. The NMOS and PMOS circuits form parasitic PNPN structures that can be triggered when a current or voltage impulse is directed into an input, output or power supply. Figure 1 shows a typical, simple, cross-section of a CMOS inverter in an N-Well, P- substrate, CMOS process. ...
dv/dt MOTOR PROTECTION OUTPUT FILTER Limits
dv/dt MOTOR PROTECTION OUTPUT FILTER Limits

... The V1K prevents voltage spikes from exceeding 1,000 V up to 2,000 feet and limits dv/dt to less than 1,000 V/ μs. The product has been ...
Series Stacking of TVS for Higher Voltages and Power Application
Series Stacking of TVS for Higher Voltages and Power Application

... HIGHER VOLTAGES In normal operation, a transient voltage suppressor should be invisible to the protected circuit. This is guaranteed by a very low leakage current at reverse stand-off voltage. As long as this voltage is not exceeded, the above mentioned feature is applicable. Some TVS applications r ...
Bio-impedance Measurement
Bio-impedance Measurement

... Fig.7. Four electrode measurement setup including non ideal parameters of ideal current source and parasitic capacitances of different elements of the system Even if we could consider the current source and the voltage sensing amplifier as ideal, it happens that, due to electromagnetic coupling betw ...
Skill Sheet 8-A Ohm's Law
Skill Sheet 8-A Ohm's Law

... so does the current (flow of charges). You also understand that if the resistance increases, the current flow decreases. A German physicist, Georg S. Ohm, developed this mathematical relationship, which is present in most circuits. This relationship is known as Ohm's law: Voltage (volts) Current (am ...
2 single phase transformers - Arrdekta Institute of Technology
2 single phase transformers - Arrdekta Institute of Technology

... Star- Delta connection Advantages 1. The primary side is star connected. Hence fewer number of turns are required. This makes the connection economical ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

Dynamic Braking of Induction Motors
Dynamic Braking of Induction Motors

BDTIC  www.BDTIC.com/infineon AP90001
BDTIC www.BDTIC.com/infineon AP90001

... Figure 2 shows the block diagram of the Inverter and motor board. The design targets robustness, compatibility to standard Inverter designs and flexibility. The Inverter’s power devices are MOSFETs with an RDS(ON) of less than 20 mΩ, the driver is based on SOI technology with a voltage rating up to ...
Current Mirrors
Current Mirrors

CHAPTER 5 PHASE SHIFTED CARRIER BASED PULSE WIDTH
CHAPTER 5 PHASE SHIFTED CARRIER BASED PULSE WIDTH

... properly written using correct syntax [73-76]. The next step is HDL RTL simulation called behavioral simulation. This step verifies whether the design entered is functionally correct or not. For this simulation the VHDL test bench is written for PWM generator architecture and simulation can be seen ...
turns ratio meter 4167f - Tinsley Instrumentation Ltd
turns ratio meter 4167f - Tinsley Instrumentation Ltd

< 1 ... 935 936 937 938 939 940 941 942 943 ... 1265 >

Islanding

Islanding refers to the condition in which a distributed generator (DG) continues to power a location even though electrical grid power from the electric utility is no longer present. Islanding can be dangerous to utility workers, who may not realize that a circuit is still powered, and it may prevent automatic re-connection of devices. For that reason, distributed generators must detect islanding and immediately stop producing power; this is referred to as anti-islanding.The common example of islanding is a grid supply line that has solar panels attached to it. In the case of a blackout, the solar panels will continue to deliver power as long as irradiance is sufficient. In this case, the supply line becomes an ""island"" with power surrounded by a ""sea"" of unpowered lines. For this reason, solar inverters that are designed to supply power to the grid are generally required to have some sort of automatic anti-islanding circuitry in them.In intentional islanding, the generator disconnects from the grid, and forces the distributed generator to power the local circuit. This is often used as a power backup system for buildings that normally sell their excess power to the grid.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report