Electrical measurement of the absorption surfaces of tree roots by
... Summary Analysis of plant root systems is difficult under field conditions, especially root systems of adult trees, which are large and complex and include fine absorbing roots as well as conducting coarse roots. Although coarse roots can be visualized by several methods, there are technical difficu ...
... Summary Analysis of plant root systems is difficult under field conditions, especially root systems of adult trees, which are large and complex and include fine absorbing roots as well as conducting coarse roots. Although coarse roots can be visualized by several methods, there are technical difficu ...
Chapter 2 FAULT IMPEDANCE LOOPS AND OVERHEAD LINE
... complicates post mortem fault analysis in that protection relays can only operate based on the quantities that it measures. Various factors such as fault resistance, earth-wire continuity and in-feed from sources located in front of the relaying position, etc. can influence the quantities measured b ...
... complicates post mortem fault analysis in that protection relays can only operate based on the quantities that it measures. Various factors such as fault resistance, earth-wire continuity and in-feed from sources located in front of the relaying position, etc. can influence the quantities measured b ...
FTB 723-1 Equipment Reference Manual P/N # 7917231
... 400 millimeter plastic lens on a composite plastic base. The lens encloses the flashtube and other flashhead components. The flashhead is usually mounted on an elevated structure. The power converter provides AC and DC voltages and various control circuits in an outdoor enclosure. It is usually situ ...
... 400 millimeter plastic lens on a composite plastic base. The lens encloses the flashtube and other flashhead components. The flashhead is usually mounted on an elevated structure. The power converter provides AC and DC voltages and various control circuits in an outdoor enclosure. It is usually situ ...
Apparent Impedance of Ground Distance Relay using Variable Zero
... As a result, the ratio of system voltage to current does not provide proper indication of the fault location and so cannot be used. Ground distance relays can also be energised by zero sequence voltage drop and zero sequence current so that it measures distance by measuring the zero sequence impedan ...
... As a result, the ratio of system voltage to current does not provide proper indication of the fault location and so cannot be used. Ground distance relays can also be energised by zero sequence voltage drop and zero sequence current so that it measures distance by measuring the zero sequence impedan ...
DNBT8105 Features Mechanical Data
... written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instruct ...
... written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instruct ...
MAX1889 Triple-Output TFT LCD Power Supply with Fault Protection General Description
... complete power-supply system. The main DC-DC converter is a high-frequency (500kHz/1MHz), current-mode step-up regulator with an integrated N-channel power MOSFET that allows the use of ultra-small inductors and ceramic capacitors. With its high closed-loop bandwidth performance, the MAX1889 provide ...
... complete power-supply system. The main DC-DC converter is a high-frequency (500kHz/1MHz), current-mode step-up regulator with an integrated N-channel power MOSFET that allows the use of ultra-small inductors and ceramic capacitors. With its high closed-loop bandwidth performance, the MAX1889 provide ...
MN132005EN/ Old S240-33-1
... The two- or three-phase MagneX interrupter is mounted through the transformer tank wall for side wall mount. Use 2.25" diameter hole size with anti-rotation nibs (.156" radius), refer to Figure 3. Nibs (either one or two) must be on the horizontal centerline of the tank hole ±5 degrees. Refer to Fig ...
... The two- or three-phase MagneX interrupter is mounted through the transformer tank wall for side wall mount. Use 2.25" diameter hole size with anti-rotation nibs (.156" radius), refer to Figure 3. Nibs (either one or two) must be on the horizontal centerline of the tank hole ±5 degrees. Refer to Fig ...
HMC232G7 数据资料DataSheet下载
... The HMC232G7 is a broadband high isolation nonreflective GaAs MESFET SPDT switch in a hermetic surface mount package. Covering DC to 6 GHz, the switch features >55 dB isolation up to 2 GHz and >42 dB isolation up to 6 GHz. The switch operates ...
... The HMC232G7 is a broadband high isolation nonreflective GaAs MESFET SPDT switch in a hermetic surface mount package. Covering DC to 6 GHz, the switch features >55 dB isolation up to 2 GHz and >42 dB isolation up to 6 GHz. The switch operates ...
LM5015 High Voltage Monolithic Two-Switch Forward DC
... The LM5015 provides two separate input power pins, VIN and PVIN, allowing for flexible decoupling options. The VIN pin provides power to the low drop-out VCC bias regulator which powers all internal control blocks. The PVIN connects directly to the high side MOSFET drain. If used with a single input ...
... The LM5015 provides two separate input power pins, VIN and PVIN, allowing for flexible decoupling options. The VIN pin provides power to the low drop-out VCC bias regulator which powers all internal control blocks. The PVIN connects directly to the high side MOSFET drain. If used with a single input ...
Issues to Consider when Substituting Large Power Transformers in
... and to produce Mvar to its limit, when the system voltage is at its lowest expected level. This is seldom possible for a fixed tap setting in the UT, and thus a compromise may have to be made by selecting the appropriate tap rating to meet the most likely operating condition. It is important to note ...
... and to produce Mvar to its limit, when the system voltage is at its lowest expected level. This is seldom possible for a fixed tap setting in the UT, and thus a compromise may have to be made by selecting the appropriate tap rating to meet the most likely operating condition. It is important to note ...
BD45241G
... Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit between pins. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the absolute maximum ...
... Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit between pins. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the absolute maximum ...
High-Voltage Circuit Breakers
... breakers begins right in the development of a new product. Switching performance, high voltage stability and performance under normal mechanical loads (wind and short circuits) as well as seismic conditions are simulated and optimized in the outline design phase using computer-aided calculations. Th ...
... breakers begins right in the development of a new product. Switching performance, high voltage stability and performance under normal mechanical loads (wind and short circuits) as well as seismic conditions are simulated and optimized in the outline design phase using computer-aided calculations. Th ...
MC10H645 (4) VIEW - Ropla Elektronik Sp. z oo
... data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent ...
... data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent ...
Superconducting Fault Current Limiters
... design into a superconducting component. Several hundred patents exist showing theoretical ways in which this phenomenon might be used to control fault currents in the electric power grid. However, efforts to develop the concepts into commercially viable product have culminated in only a few practic ...
... design into a superconducting component. Several hundred patents exist showing theoretical ways in which this phenomenon might be used to control fault currents in the electric power grid. However, efforts to develop the concepts into commercially viable product have culminated in only a few practic ...
Liebert Series 610 UPS Installation Manual - 1000kVA, 60Hz, Three Phase Multi-Module
... Under typical operation and with all UPS doors closed, only normal safety precautions are necessary. The area around the UPS system should be kept free of puddles of water, excess moisture and debris. Special safety precautions are required for procedures involving handling, installation and mainten ...
... Under typical operation and with all UPS doors closed, only normal safety precautions are necessary. The area around the UPS system should be kept free of puddles of water, excess moisture and debris. Special safety precautions are required for procedures involving handling, installation and mainten ...
Historical Development of the Transformer
... different operation of lamps, which were galvanically separated would not affect the other lamps. Although he was mistaken, he still managed to improve the operation of the system, and what is even more important, he started the research-development activity that led to the development of the heavyc ...
... different operation of lamps, which were galvanically separated would not affect the other lamps. Although he was mistaken, he still managed to improve the operation of the system, and what is even more important, he started the research-development activity that led to the development of the heavyc ...
1. Principle of Resistance Measurement
... In the process of auto inspection, DO NOT press the trigger, nor open the jaw, nor clamp any wire. In auto-inspection process, be sure to maintain the natural static state of the Meter; do not overturn the Meter, nor impose any external force on the jaw. Otherwise, the accuracy of measurement cannot ...
... In the process of auto inspection, DO NOT press the trigger, nor open the jaw, nor clamp any wire. In auto-inspection process, be sure to maintain the natural static state of the Meter; do not overturn the Meter, nor impose any external force on the jaw. Otherwise, the accuracy of measurement cannot ...
2SP0325T Preliminary Description & Application Manual
... Even if only single IGBTs are tested, all the system’s gate drivers must be supplied with energy. All the other IGBTs are then kept in the off state by applying negative gate voltages. This is particularly important when switching the IGBTs under test. The short-circuit behavior can also be verified ...
... Even if only single IGBTs are tested, all the system’s gate drivers must be supplied with energy. All the other IGBTs are then kept in the off state by applying negative gate voltages. This is particularly important when switching the IGBTs under test. The short-circuit behavior can also be verified ...
three-level npc inverter used in ups
... power sources. Meanwhile, the limitations of traditional three-phase two-level inverters are disclosed. With the fast development of power converter technologies, multilevel converters are good choice for medium voltage industrial applications. Normally, the multilevel inverters are classified into ...
... power sources. Meanwhile, the limitations of traditional three-phase two-level inverters are disclosed. With the fast development of power converter technologies, multilevel converters are good choice for medium voltage industrial applications. Normally, the multilevel inverters are classified into ...
ELEC 101 ELECTRIC CIRCUITS 1
... Integrates the basic principles of electrical power generation, transmission, distribution and utilization by industrial, commercial and residential users. Theory, operation and construction of alternators, transformers, transmission lines and various loads are presented. Included is a study of the ...
... Integrates the basic principles of electrical power generation, transmission, distribution and utilization by industrial, commercial and residential users. Theory, operation and construction of alternators, transformers, transmission lines and various loads are presented. Included is a study of the ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... bring higher voltage parts of a circuit into direct electrical contact with parts that are normally at lower voltages, so in high-voltage circuits, a short can present a dangerous electrocution hazard. Fuses are therefore selected to allow passage of normal current plus a marginal percentage and to ...
... bring higher voltage parts of a circuit into direct electrical contact with parts that are normally at lower voltages, so in high-voltage circuits, a short can present a dangerous electrocution hazard. Fuses are therefore selected to allow passage of normal current plus a marginal percentage and to ...
Current Sensing Chip Resistors
... Introduction..............................................................3 Current-Sensing Circuit Applications..........4 Market Applications..............................................6 ...
... Introduction..............................................................3 Current-Sensing Circuit Applications..........4 Market Applications..............................................6 ...
Ground (electricity)
In electrical engineering, ground or earth is the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth.Electrical circuits may be connected to ground (earth) for several reasons. In mains powered equipment, exposed metal parts are connected to ground to prevent user contact with dangerous voltage if electrical insulation fails. Connections to ground limit the build-up of static electricity when handling flammable products or electrostatic-sensitive devices. In some telegraph and power transmission circuits, the earth itself can be used as one conductor of the circuit, saving the cost of installing a separate return conductor (see single-wire earth return).For measurement purposes, the Earth serves as a (reasonably) constant potential reference against which other potentials can be measured. An electrical ground system should have an appropriate current-carrying capability to serve as an adequate zero-voltage reference level. In electronic circuit theory, a ""ground"" is usually idealized as an infinite source or sink for charge, which can absorb an unlimited amount of current without changing its potential. Where a real ground connection has a significant resistance, the approximation of zero potential is no longer valid. Stray voltages or earth potential rise effects will occur, which may create noise in signals or if large enough will produce an electric shock hazard.The use of the term ground (or earth) is so common in electrical and electronics applications that circuits in portable electronic devices such as cell phones and media players as well as circuits in vehicles may be spoken of as having a ""ground"" connection without any actual connection to the Earth, despite ""common"" being a more appropriate term for such a connection. This is usually a large conductor attached to one side of the power supply (such as the ""ground plane"" on a printed circuit board) which serves as the common return path for current from many different components in the circuit.