Insulation coordination studies
... aspects like switching topology (e.g. normal operation or operating with contingencies), operating point (e.g. underexcited versus overexcited generator operation), component characteristics (e.g. remanent flux at transformer energization) and overvoltage excitation (e.g. different lightning strikes ...
... aspects like switching topology (e.g. normal operation or operating with contingencies), operating point (e.g. underexcited versus overexcited generator operation), component characteristics (e.g. remanent flux at transformer energization) and overvoltage excitation (e.g. different lightning strikes ...
400- to 690-V AC Input 50-W Flyback Isolated
... • Topology to replace single high-voltage FET with two low-cost FETs • Constant uniform power limit throughout the input range • Reduced BOM cost by using UCC28711 through primary side regulation, thus eliminating isolated secondary feedback • Protection against component failure in the feedback pat ...
... • Topology to replace single high-voltage FET with two low-cost FETs • Constant uniform power limit throughout the input range • Reduced BOM cost by using UCC28711 through primary side regulation, thus eliminating isolated secondary feedback • Protection against component failure in the feedback pat ...
Causes and Effects of Transient Voltages
... Arcing can generate transients from a number of sources. Faulty contacts in breakers, switches, and contactors can produce an arc when voltage jumps the gap. When this gap is "jumped" the voltage rises suddenly and the most common effect is an oscillat ory-ring-type transient. Faulty connection ...
... Arcing can generate transients from a number of sources. Faulty contacts in breakers, switches, and contactors can produce an arc when voltage jumps the gap. When this gap is "jumped" the voltage rises suddenly and the most common effect is an oscillat ory-ring-type transient. Faulty connection ...
AC Generators with 2/3rd and 5/6th winding pitch 429.56 KB
... distorted supply voltage waveform, as can linear loads on the system. In addition, in the category of ‘ordinary’ load it must be considered that most buildings including modern equipment will almost certainly have an IT network supporting PCs or terminals. Most such modules employ switched mode powe ...
... distorted supply voltage waveform, as can linear loads on the system. In addition, in the category of ‘ordinary’ load it must be considered that most buildings including modern equipment will almost certainly have an IT network supporting PCs or terminals. Most such modules employ switched mode powe ...
balun basics primer
... b) a transmission line balun consisting of a bifilar coil of two wires wound around each other, with one end connected to ground, and c) a transmission line balun using magnetic core for additional low frequency coupling ...
... b) a transmission line balun consisting of a bifilar coil of two wires wound around each other, with one end connected to ground, and c) a transmission line balun using magnetic core for additional low frequency coupling ...
AN3105
... For these reasons a street lighting power supply designed to power an LED lamp must have high efficiency and at least a similar lifetime, in order to guarantee the maintenance free operation required by these kinds of applications. This application note describes the characteristics and features of ...
... For these reasons a street lighting power supply designed to power an LED lamp must have high efficiency and at least a similar lifetime, in order to guarantee the maintenance free operation required by these kinds of applications. This application note describes the characteristics and features of ...
Modeling of the Starting Performance of Large Solid-Pole Synchronous
... simulation [27]. In the test setup, the stator windings are supplied with half the rated voltage and the field winding is shorted through a discharge resistor to limit the induced currents of the field winding. The acceleration speed comparison between test, FEA and equivalent circuit model are show ...
... simulation [27]. In the test setup, the stator windings are supplied with half the rated voltage and the field winding is shorted through a discharge resistor to limit the induced currents of the field winding. The acceleration speed comparison between test, FEA and equivalent circuit model are show ...
Time optimal control of one and double one winding VCM motor*
... “DS1104DAC_C1” and “DS1104DAC_C2” are outputs of estimated angular velocity and angular position. The other blocks perform the same function as in the Figure 4. The VCM motor has a second coil, which is short circuited by resistor. In the simplest case voltage drop on short circuiting resistor (omit ...
... “DS1104DAC_C1” and “DS1104DAC_C2” are outputs of estimated angular velocity and angular position. The other blocks perform the same function as in the Figure 4. The VCM motor has a second coil, which is short circuited by resistor. In the simplest case voltage drop on short circuiting resistor (omit ...
06 System Grounding
... ground potential also, this has big implications for the system. It means that the line-to-ground insulation level of equipment need only be as large as the phase-to-neutral voltage, which is 57.7% of the phase-to-phase voltage. It also means that the system is less susceptible to phase-to-ground vo ...
... ground potential also, this has big implications for the system. It means that the line-to-ground insulation level of equipment need only be as large as the phase-to-neutral voltage, which is 57.7% of the phase-to-phase voltage. It also means that the system is less susceptible to phase-to-ground vo ...
FDJP Ordinance on Electrical Energy and Power Measuring
... The manufacturer must in particular specify the following nominal operating conditions for the meter: The values of fn, Un, In, Ist, Imin, Itr and Imax that apply to the meter. For the specified current values, the meter must fulfil the conditions indicated in ...
... The manufacturer must in particular specify the following nominal operating conditions for the meter: The values of fn, Un, In, Ist, Imin, Itr and Imax that apply to the meter. For the specified current values, the meter must fulfil the conditions indicated in ...
LabVIEW based Electrical Machines Laboratory for
... these Labs are designed for students in accordance with theoretical course work. Software based Electrical Machines cost less and have provision of wide ranging change in parameters as compared to hardware based Lab, which results in better understanding of students in learning concepts of Electrica ...
... these Labs are designed for students in accordance with theoretical course work. Software based Electrical Machines cost less and have provision of wide ranging change in parameters as compared to hardware based Lab, which results in better understanding of students in learning concepts of Electrica ...
Multiple Input Single Output (MISO)
... Figure 3-3: Schematic of MISO Flyback Converter Design..................................................................... 9 Figure 3-4: Simulation Result of the output voltage and one of the primary winding current of the MISO Flyback Converter ..................................................... ...
... Figure 3-3: Schematic of MISO Flyback Converter Design..................................................................... 9 Figure 3-4: Simulation Result of the output voltage and one of the primary winding current of the MISO Flyback Converter ..................................................... ...
CYB_PDU_Guideform Spec
... Input conductors terminate directly on breaker lugs for 50 to 200 kVA. Terminal block with 2-500 kcmil wire capacity is provided standard for 225 and 300 kVA. The same terminal block with 2-500 kcmil wire capacity can also be provided as an option for all other ratings. ...
... Input conductors terminate directly on breaker lugs for 50 to 200 kVA. Terminal block with 2-500 kcmil wire capacity is provided standard for 225 and 300 kVA. The same terminal block with 2-500 kcmil wire capacity can also be provided as an option for all other ratings. ...
transformer loss compensation for metermen
... expressed as a percent of the full load current. The no-load (iron) loss and percent exciting current tests are normally done on the low voltage side of the transformer because the current readings are larger, and therefore easier to read. Additionally a lower voltage power source will be easier to ...
... expressed as a percent of the full load current. The no-load (iron) loss and percent exciting current tests are normally done on the low voltage side of the transformer because the current readings are larger, and therefore easier to read. Additionally a lower voltage power source will be easier to ...
NWL Troubleshooting Guide - NWL
... circuit. This wave shaping results in several benefits to the overall system. These benefits become particularly important for systems that are running at conduction angles of 90 degrees or less (50% conduction or less). As the inductance of the primary circuit is increased, the percent conductance ...
... circuit. This wave shaping results in several benefits to the overall system. These benefits become particularly important for systems that are running at conduction angles of 90 degrees or less (50% conduction or less). As the inductance of the primary circuit is increased, the percent conductance ...
The Aircraft Magneto
... between magnetic poles. A laminated soft iron bar is a better conductor than air. For this reason, the lines will crowd together and pass through the bar (Figure 2) when placed near the magnet. In Figure 2, the flux lines comprising the magnetic field are concentrated in a defined path within the ba ...
... between magnetic poles. A laminated soft iron bar is a better conductor than air. For this reason, the lines will crowd together and pass through the bar (Figure 2) when placed near the magnet. In Figure 2, the flux lines comprising the magnetic field are concentrated in a defined path within the ba ...
UFGS 26 27 13.10 30 Electric Meters
... the following list to reflect only the submittals required for the project. The Guide Specification technical editors have designated those items that require Government approval, due to their complexity or criticality, with a "G." Generally, other submittal items can be reviewed by the Contractor's ...
... the following list to reflect only the submittals required for the project. The Guide Specification technical editors have designated those items that require Government approval, due to their complexity or criticality, with a "G." Generally, other submittal items can be reviewed by the Contractor's ...
Transformer
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Commonly, transformers are used to increase or decrease the voltages of alternating current in electric power applications.A varying current in the transformer's primary winding creates a varying magnetic flux in the transformer core and a varying magnetic field impinging on the transformer's secondary winding. This varying magnetic field at the secondary winding induces a varying electromotive force (EMF) or voltage in the secondary winding. Making use of Faraday's Law in conjunction with high magnetic permeability core properties, transformers can thus be designed to efficiently change AC voltages from one voltage level to another within power networks.Since the invention of the first constant potential transformer in 1885, transformers have become essential for the transmission, distribution, and utilization of alternating current electrical energy. A wide range of transformer designs are encountered in electronic and electric power applications. Transformers range in size from RF transformers less than a cubic centimeter in volume to units interconnecting the power grid weighing hundreds of tons.