High Voltage Engineering
... bushing, a coaxial cable could also be used if this improves the connection between testing transformer and test object. In Fig.1.1.c the active part of the transformer is housed within an isolating cylinder ‘7’ avoiding the use of the bushing. This construction reduces the height, although the heat ...
... bushing, a coaxial cable could also be used if this improves the connection between testing transformer and test object. In Fig.1.1.c the active part of the transformer is housed within an isolating cylinder ‘7’ avoiding the use of the bushing. This construction reduces the height, although the heat ...
CHAPTER 11
... In the series-connected generator the field flux is obtained by passing the armature current through the series-field winding. Because the excitation is provided by the armature current, it varies widely with load, especially for a generator and therefore suffers from very poor voltage regulation. W ...
... In the series-connected generator the field flux is obtained by passing the armature current through the series-field winding. Because the excitation is provided by the armature current, it varies widely with load, especially for a generator and therefore suffers from very poor voltage regulation. W ...
technical manual (PDF 59k)
... pre-set safe maximum value, the SCOOP inhibits the triggering of the thyristor which controls the current supply to the exciter winding. The result is the alternator output voltage falls to approximately 50 volts. Allowance is made for temporary overloads, such as those encountered when starting ele ...
... pre-set safe maximum value, the SCOOP inhibits the triggering of the thyristor which controls the current supply to the exciter winding. The result is the alternator output voltage falls to approximately 50 volts. Allowance is made for temporary overloads, such as those encountered when starting ele ...
Discussion on lightning impulse test procedure
... 1- "As I believe we may have discussed during the last meeting, the value of inductance we are using in our calculations is based on the 60 Hz parameters of the transformer. If we were able to calculate the effective value of this inductance in the impulse frequency range I believe it would be a hig ...
... 1- "As I believe we may have discussed during the last meeting, the value of inductance we are using in our calculations is based on the 60 Hz parameters of the transformer. If we were able to calculate the effective value of this inductance in the impulse frequency range I believe it would be a hig ...
10 kV High Voltage Generator with LLC Resonant Circuit for
... varies from ten to tens of kV/cm, pulse width ranges from several to hundreds of μs and repetitive rate changes from 0.1 Hz to 100 Hz. To realize the above specifications, many PEF generators (PEFGs) adopt a high voltage generator (HVG) combined with switch sets with high voltage ratings (SSHVR) to ...
... varies from ten to tens of kV/cm, pulse width ranges from several to hundreds of μs and repetitive rate changes from 0.1 Hz to 100 Hz. To realize the above specifications, many PEF generators (PEFGs) adopt a high voltage generator (HVG) combined with switch sets with high voltage ratings (SSHVR) to ...
Low-frequency and Tonal Characteristics of Transformer Noise
... Electricity substations and their associated transformers are necessary for community power needs. In NSW these substations are often located in rural areas where background noise is low. Noise ‘hum’ from the transformers can be an issue for residents located nearby to the substation, and the tonal ...
... Electricity substations and their associated transformers are necessary for community power needs. In NSW these substations are often located in rural areas where background noise is low. Noise ‘hum’ from the transformers can be an issue for residents located nearby to the substation, and the tonal ...
Principles of HF tube welding - Electronic Heating Equipment
... A theorectically perfect ferrite would not require any of air to achieve the same cooling effect. Chilling the cooling but unfortunately we are not quite there yet. air or nitrogen will reduce the flow requirements, but Modern ferrites are much improved over those ferrite works best in the 80-150 de ...
... A theorectically perfect ferrite would not require any of air to achieve the same cooling effect. Chilling the cooling but unfortunately we are not quite there yet. air or nitrogen will reduce the flow requirements, but Modern ferrites are much improved over those ferrite works best in the 80-150 de ...
Descriptive Bulletin 451-30
... Fault Tamer Fuse Limiter is an energy-limiting faultinterrupting device which can be easily incorporated in new or existing installations of overhead distribution transformers to provide short-circuit protection to the system, to limit let-through current to a level which will minimize catastrophic ...
... Fault Tamer Fuse Limiter is an energy-limiting faultinterrupting device which can be easily incorporated in new or existing installations of overhead distribution transformers to provide short-circuit protection to the system, to limit let-through current to a level which will minimize catastrophic ...
Review of Inductive Pulsed Power Generators for Railguns
... deliver a maximum current of 100 kA [49], [50]. The turns ratio of the transformer is at maximum 20:1, but it is operated with a turns ratio of 5:1. Pulse compression is not applied in this system. Another system was very recently built at the GEDI Lab for the supply of a brush railgun [52]. Here, a ...
... deliver a maximum current of 100 kA [49], [50]. The turns ratio of the transformer is at maximum 20:1, but it is operated with a turns ratio of 5:1. Pulse compression is not applied in this system. Another system was very recently built at the GEDI Lab for the supply of a brush railgun [52]. Here, a ...
Product Range 2014 Portable Reference Meters
... with integrated current source • Current generation from 10 mA up to 100 A • Voltage generation from 40 V up to 500 V • Verification of the load conditions on metering installations • Functions amongst others: - Vector display - Harmonic measurement - Error measurement - Automatic measurement - Selec ...
... with integrated current source • Current generation from 10 mA up to 100 A • Voltage generation from 40 V up to 500 V • Verification of the load conditions on metering installations • Functions amongst others: - Vector display - Harmonic measurement - Error measurement - Automatic measurement - Selec ...
Increased transformer reliability through transparent
... measurement results into an overall picture, rather than founding the analysis on measurements of individual sensors. ...
... measurement results into an overall picture, rather than founding the analysis on measurements of individual sensors. ...
ELA O 320.6 en EGE Arc suppression coil
... box (D) to the main screw shaft bearing cores. The motor (C) is fixed to a flange of the main gear box. The gear box is placed on ASC cover and equipped with a flat and Simmering ...
... box (D) to the main screw shaft bearing cores. The motor (C) is fixed to a flange of the main gear box. The gear box is placed on ASC cover and equipped with a flat and Simmering ...
UFC 3-520-01 Interior Electrical Systems
... Apply three-phase, four-wire, 480Y/277V systems for lighting and power demand loads greater than 150 kVA unless 208Y/120V systems are shown to be more cost-effective. Use step-down transformers inside the facility as required to obtain lower voltages.. FREQUENCY. ...
... Apply three-phase, four-wire, 480Y/277V systems for lighting and power demand loads greater than 150 kVA unless 208Y/120V systems are shown to be more cost-effective. Use step-down transformers inside the facility as required to obtain lower voltages.. FREQUENCY. ...
Alberta Reliability standard Transmission Relay Loadability PRC-023-AB-2
... This reliability standard applies to: (a) a legal owner of a transmission facility with load-responsive phase protection systems, as described in Appendix 1 applied to any one (1) or more of the following facilities: (i) transmission lines operated at two hundred (200) kV and above; (ii) transmissio ...
... This reliability standard applies to: (a) a legal owner of a transmission facility with load-responsive phase protection systems, as described in Appendix 1 applied to any one (1) or more of the following facilities: (i) transmission lines operated at two hundred (200) kV and above; (ii) transmissio ...
power quality guidebook
... Poor power quality is characterized by electrical disturbances, such as transients, surges, sags, power interruptions and harmonics. The disturbances can originate externally without warning, but are often generated within your facility. Eighty percent of electrical disturbances that cause poor powe ...
... Poor power quality is characterized by electrical disturbances, such as transients, surges, sags, power interruptions and harmonics. The disturbances can originate externally without warning, but are often generated within your facility. Eighty percent of electrical disturbances that cause poor powe ...
final project report ee3390 electronic circuits design lab power inverter
... We initially considered an H-bridge to be the solution to the problem as these can often be used with pulse-width modulating systems. After further review however we have already gone through the trouble of making a sine wave (the stage after the PWM), and so an H-bridge would have been very challen ...
... We initially considered an H-bridge to be the solution to the problem as these can often be used with pulse-width modulating systems. After further review however we have already gone through the trouble of making a sine wave (the stage after the PWM), and so an H-bridge would have been very challen ...
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.