RI-R38
... The auxiliary power supply could be the same of the network to control. Insulation control Terminals 5-11 The two terminals must be connected between the line under control and the earth of measure reference. The terminal 5 must be connected to the neutral conductor of the single-phase or the three- ...
... The auxiliary power supply could be the same of the network to control. Insulation control Terminals 5-11 The two terminals must be connected between the line under control and the earth of measure reference. The terminal 5 must be connected to the neutral conductor of the single-phase or the three- ...
Introduction to Short Circuit Current Calculations
... Three-phase fault analysis for the balanced systems requires only the positive sequence system components impedances Z 1 = (R 1 + jX 1 ). For calculation of the line-to-line faults, negative sequence impedances Z 2 = (R 2 + jX 2 ) are required. For all faults involving connection to the ground, such ...
... Three-phase fault analysis for the balanced systems requires only the positive sequence system components impedances Z 1 = (R 1 + jX 1 ). For calculation of the line-to-line faults, negative sequence impedances Z 2 = (R 2 + jX 2 ) are required. For all faults involving connection to the ground, such ...
Aalborg Universitet Study of High Voltage AC Underground Cable Systems
... The inductance of a transformer can create a series resonance circuit with the capacitance of a cable. This situation is characterized by low impedance for the harmonic currents at the resonance frequency, what may result in high current distortion and overvoltage if the cable is long enough. The re ...
... The inductance of a transformer can create a series resonance circuit with the capacitance of a cable. This situation is characterized by low impedance for the harmonic currents at the resonance frequency, what may result in high current distortion and overvoltage if the cable is long enough. The re ...
Basics of Switchboards
... The power from the utility company is metered and enters the plant through a distribution switchboard. The switchboard incorporates a main circuit breaker and circuit breakers for each of the three feeders. The feeder on the left powers a distribution switchboard, which, in turn, feeds a panelboard ...
... The power from the utility company is metered and enters the plant through a distribution switchboard. The switchboard incorporates a main circuit breaker and circuit breakers for each of the three feeders. The feeder on the left powers a distribution switchboard, which, in turn, feeds a panelboard ...
CONTENTS
... 2) Alterations to stop objectionable current. If the use of multiple grounding connections results in an objectionable flow of current, one or more of the following alterations are permitted to be made, provided that the requirements of NEC Section 250-51, are met. Such permitted alterations are: 1. ...
... 2) Alterations to stop objectionable current. If the use of multiple grounding connections results in an objectionable flow of current, one or more of the following alterations are permitted to be made, provided that the requirements of NEC Section 250-51, are met. Such permitted alterations are: 1. ...
Use of the Fluke 105B Scopemeter on the Farm
... The BNC to banana plug adapters do not have a voltage divider in them as the probes do (ie. 10:1 probes supplied with the Scopemeter. Therefore they must not be connected to equipment where the 300 v scopementer rating may be exceeded. Also, the outer shield of the BNC connector is metallic. Therefo ...
... The BNC to banana plug adapters do not have a voltage divider in them as the probes do (ie. 10:1 probes supplied with the Scopemeter. Therefore they must not be connected to equipment where the 300 v scopementer rating may be exceeded. Also, the outer shield of the BNC connector is metallic. Therefo ...
SL10.305 - PULS Power Supply
... This compact power supply unit is characterised by the variety of application possibilities and low system costs. The fact that the external fuses are no longer necessary is an advantage as it saves cost and space. The selectable FUSE Mode and the fully specified 2-phase operation make the SL10.305 ...
... This compact power supply unit is characterised by the variety of application possibilities and low system costs. The fact that the external fuses are no longer necessary is an advantage as it saves cost and space. The selectable FUSE Mode and the fully specified 2-phase operation make the SL10.305 ...
RSM002P03
... otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. ...
... otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. ...
Improvement of current total harmonic distortion level
... Induction motors are workhorses for many industries. In order to obtain highly efficient use of the induction motors, the AC variable speed drives have been developed. The most important part for the AC variable speed drives is the inverter which is used as a source for driving the motor. There are ...
... Induction motors are workhorses for many industries. In order to obtain highly efficient use of the induction motors, the AC variable speed drives have been developed. The most important part for the AC variable speed drives is the inverter which is used as a source for driving the motor. There are ...
MAX8627 Low V , 20µA IQ, 1MHz Synchronous Boost Converter with True Shutdown
... a slightly higher than nominal level. At full load, the output voltage is slightly lower than the nominal level. With voltage positioning, the total voltage deviation during a transient is significantly improved over traditional highgain control loops. Traditional high-gain loops use integrators tha ...
... a slightly higher than nominal level. At full load, the output voltage is slightly lower than the nominal level. With voltage positioning, the total voltage deviation during a transient is significantly improved over traditional highgain control loops. Traditional high-gain loops use integrators tha ...
A new ZVT PWM DC-DC converter
... a short circuit occurs at the same time. The prevention of this short circuit causing losses and EMI noise of large magnitudes is very hard to realize. Also, the auxiliary switch is turned off with hard switching, and the parasitic capacitors of the switches discharge through the switches [3], [5]. ...
... a short circuit occurs at the same time. The prevention of this short circuit causing losses and EMI noise of large magnitudes is very hard to realize. Also, the auxiliary switch is turned off with hard switching, and the parasitic capacitors of the switches discharge through the switches [3], [5]. ...
Stakeholder Comparison Comment Rationale Matrix 2011-09-28 AESO AUTHORITATIVE DOCUMENT PROCESS
... protect the electrical network from these faults. ...
... protect the electrical network from these faults. ...
Power MOSFET, 24 A, 60 V, Logic Level, N-Channel DPAK
... 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. SCILLC does not convey any license under its patent rights nor th ...
... 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. SCILLC does not convey any license under its patent rights nor th ...
lightning protection
... All coaxial cables have armored insulated cables The armored cable is earthed at several points along the cable length ...
... All coaxial cables have armored insulated cables The armored cable is earthed at several points along the cable length ...
From MARIC minutes of 22.11.2006
... (PCS1-3). This took the best part of the time (because of the low threshold). PCS4 was the easiest step • We verified the absence of “very bad” (>>1μΩ) splices for the “priority 1” short list of circuits • Tolerances from cryogenics (almost) OK • These tolerances are distinct from quench limits (loc ...
... (PCS1-3). This took the best part of the time (because of the low threshold). PCS4 was the easiest step • We verified the absence of “very bad” (>>1μΩ) splices for the “priority 1” short list of circuits • Tolerances from cryogenics (almost) OK • These tolerances are distinct from quench limits (loc ...
LM340 Series Three Terminal Positive Regulators
... using R1, R2, and D1. Assuming the base-to-emitter voltage of Q1 and the voltage drop across D1 are equal, the voltage drops across R1 and R2 are equal. The currents through R1 and R2 will then be inversely proportional to their resistances. For the example shown on Figure 6 , resistor R1 will have ...
... using R1, R2, and D1. Assuming the base-to-emitter voltage of Q1 and the voltage drop across D1 are equal, the voltage drops across R1 and R2 are equal. The currents through R1 and R2 will then be inversely proportional to their resistances. For the example shown on Figure 6 , resistor R1 will have ...
PDF
... SINCE its first introduction, static power converter development has grown rapidly with many converter topologies now readily found in the open literature. Accompanying this development is the equally rapid identification of application areas, where power converters can contribute positively toward ...
... SINCE its first introduction, static power converter development has grown rapidly with many converter topologies now readily found in the open literature. Accompanying this development is the equally rapid identification of application areas, where power converters can contribute positively toward ...
multi-input dc-dc converter for renewable energy sources
... MATLAB is a high-performance language for technical computing. It integrates computation, visualization, and programming in an easy to use environment. MATLAB is an excellent tool for teaching and research. In this, the MATLAB simulink model for Multi-Input DC-DC Converter is modeled and simulated w ...
... MATLAB is a high-performance language for technical computing. It integrates computation, visualization, and programming in an easy to use environment. MATLAB is an excellent tool for teaching and research. In this, the MATLAB simulink model for Multi-Input DC-DC Converter is modeled and simulated w ...
Publication : Cost-Optimal Design of a 3
... optimized to get minimum possible cost of production subject to usual design constraints e.g. the efficiency is not less than 98%, no load current not more than 1%, voltage regulation is not more than 5% (for a distribution transformer) or the short circuit MVA is not more than 8 p.u. (for a power t ...
... optimized to get minimum possible cost of production subject to usual design constraints e.g. the efficiency is not less than 98%, no load current not more than 1%, voltage regulation is not more than 5% (for a distribution transformer) or the short circuit MVA is not more than 8 p.u. (for a power t ...
Electrical substation
A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different voltage levels.Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally substations are unattended, relying on SCADA for remote supervision and control.A substation may include transformers to change voltage levels between high transmission voltages and lower distribution voltages, or at the interconnection of two different transmission voltages. The word substation comes from the days before the distribution system became a grid. As central generation stations became larger, smaller generating plants were converted to distribution stations, receiving their energy supply from a larger plant instead of using their own generators. The first substations were connected to only one power station, where the generators were housed, and were subsidiaries of that power station.