Berechnung von Netztransienten
... • Single phase faults in stator windings are in most cases intermittent faults. • The corresponding transient fault currents are by a factor of 60 higher than the small steady state fault current and hence responsible for damages in stator iron and winding. • High resistance grounding (most usual) o ...
... • Single phase faults in stator windings are in most cases intermittent faults. • The corresponding transient fault currents are by a factor of 60 higher than the small steady state fault current and hence responsible for damages in stator iron and winding. • High resistance grounding (most usual) o ...
Document
... Rotor vanes of D0 cause periodic change in capacitance between the insulated disc D2 and the high voltage electrode D3. Number and shape of vanes are so designed that a suitable variation of capacitance (sinusodial or linear) is achieved. The a.c. current is rectified and is measured using moving co ...
... Rotor vanes of D0 cause periodic change in capacitance between the insulated disc D2 and the high voltage electrode D3. Number and shape of vanes are so designed that a suitable variation of capacitance (sinusodial or linear) is achieved. The a.c. current is rectified and is measured using moving co ...
How to use a Digital Multimeter
... resistance is called a multimeter, • When measuring Voltage the multimeter must be connected to two points in a circuit in order to obtain a good reading. Be careful not to touch the bare probe tips together while measuring voltage, as this will create a short-circuit! • Never read Resistance or tes ...
... resistance is called a multimeter, • When measuring Voltage the multimeter must be connected to two points in a circuit in order to obtain a good reading. Be careful not to touch the bare probe tips together while measuring voltage, as this will create a short-circuit! • Never read Resistance or tes ...
Charging_Capacitors
... to view charging/discharging curves Note – depending on the students experience in connecting circuits, the circuits can be set up in advance or left for the students to connect. Action The students connect up the circuit to the oscilloscope and the power supply. They should observe the charging cur ...
... to view charging/discharging curves Note – depending on the students experience in connecting circuits, the circuits can be set up in advance or left for the students to connect. Action The students connect up the circuit to the oscilloscope and the power supply. They should observe the charging cur ...
operation
... converted to a sine-coded, variable frequency output, which provides optimum speed control of any conventional squirrel cage induction motor and permanent magnet motor. The use of IGBTs (Insulated Gate Bipolar Transistors), with a carrier frequency range of 1 kHz to 12.5 kHz, permits quiet motor ope ...
... converted to a sine-coded, variable frequency output, which provides optimum speed control of any conventional squirrel cage induction motor and permanent magnet motor. The use of IGBTs (Insulated Gate Bipolar Transistors), with a carrier frequency range of 1 kHz to 12.5 kHz, permits quiet motor ope ...
Analogical Modelling and Numerical Simulation of the Single
... The Front Panel contains the structural and signal parameters as data inputs and the graphs for displaying the calculated signals. The Block Diagram (figure 3) contains SubVI’s like those of “calculation of coefficients” or “calculation of derivatives”, etc. In the figure 4 are shown the evolutions ...
... The Front Panel contains the structural and signal parameters as data inputs and the graphs for displaying the calculated signals. The Block Diagram (figure 3) contains SubVI’s like those of “calculation of coefficients” or “calculation of derivatives”, etc. In the figure 4 are shown the evolutions ...
International Electrical Engineering Journal (IEEJ) Vol. 6 (2015) No.3, pp. 1809-1814
... solutions to fundamental frequency problems. Power electronics modules can be added in situations where rapid control action is required to damp oscillations or prevent excessive voltage variations. Hence, basic IPC solutions utilize only conventional equipment, such as capacitors, inductors and pha ...
... solutions to fundamental frequency problems. Power electronics modules can be added in situations where rapid control action is required to damp oscillations or prevent excessive voltage variations. Hence, basic IPC solutions utilize only conventional equipment, such as capacitors, inductors and pha ...
Linear Regulator Fundamentals
... Simple Model • A basic (first order) linear voltage regulator can be modeled with two resistors and a power supply for VIN. • In reality, the only constant is the output voltage, VOUT. Everything else can, and will, be constantly changing. • The input voltage may have changes due to outside influen ...
... Simple Model • A basic (first order) linear voltage regulator can be modeled with two resistors and a power supply for VIN. • In reality, the only constant is the output voltage, VOUT. Everything else can, and will, be constantly changing. • The input voltage may have changes due to outside influen ...
LTS15-NP, LEM, current sensor 15Arms, Vout, +5V supply.pdf
... Insulating material group Mass Standards ...
... Insulating material group Mass Standards ...
A METHOD FOR CHARACTERIZATION OF THREE
... source impedances are equal. This resulted in four types of three-phase unbalanced sag, shown as a phasor diagram in Figure 2. Type A is due to three-phase faults, types B, C and D are due to single-phase and phase-to- phase faults. Type B contains a zero-sequence component which is rarely transferr ...
... source impedances are equal. This resulted in four types of three-phase unbalanced sag, shown as a phasor diagram in Figure 2. Type A is due to three-phase faults, types B, C and D are due to single-phase and phase-to- phase faults. Type B contains a zero-sequence component which is rarely transferr ...
MX60 green.indd
... OutBack’s real time active Maximum Power Point Tracking (MPPT) Built-in Data Logging system ensures that your solar array is operating at its peak power point regardless of age, shading or environmental conditions. A peak Standard 2 Year Warranty operating efficiency of 98% maximizes your PV array’s p ...
... OutBack’s real time active Maximum Power Point Tracking (MPPT) Built-in Data Logging system ensures that your solar array is operating at its peak power point regardless of age, shading or environmental conditions. A peak Standard 2 Year Warranty operating efficiency of 98% maximizes your PV array’s p ...
Buck Boost Converter Seminar.pdf
... THEORY:The buck–boost converter is a type of DC-to-DC converter that has an output voltage magnitude that is either greater than or less than the input voltage magnitude. It is a switched-mode power supply with a similar circuit topology to the boost converter and the buck converter. The output volt ...
... THEORY:The buck–boost converter is a type of DC-to-DC converter that has an output voltage magnitude that is either greater than or less than the input voltage magnitude. It is a switched-mode power supply with a similar circuit topology to the boost converter and the buck converter. The output volt ...
99068
... B r i e f l y, phase trip corresponds to the actual load current through the conductor while ground trip is the unbalance of the three-phase currents. Ground tripping will trip all three phases below the phase trip minimum trip value since ground tripping can be the result of any unbalance on the sy ...
... B r i e f l y, phase trip corresponds to the actual load current through the conductor while ground trip is the unbalance of the three-phase currents. Ground tripping will trip all three phases below the phase trip minimum trip value since ground tripping can be the result of any unbalance on the sy ...
DND5057 - pes-psrc
... Four-reactor scheme. A shunt reactor arrangement consisting of three wye-connected reactors and a fourth connected from neutral to ground. GPS time synchronization. A method of using a time signal from the Global Positioning System (GPS) satellite system for time-synchronizing equipment. Ground faul ...
... Four-reactor scheme. A shunt reactor arrangement consisting of three wye-connected reactors and a fourth connected from neutral to ground. GPS time synchronization. A method of using a time signal from the Global Positioning System (GPS) satellite system for time-synchronizing equipment. Ground faul ...
PS1: Overcurrent Protection of a Substation Power Transformer
... disconnection is achieved through circuit breakers, and overcurrent relays can be added to the protection schemes to provide overcurrent protection. This additional protection serves as a general backup protection in case of a failure of the main protection system. Figure 1 shows overcurrent and ear ...
... disconnection is achieved through circuit breakers, and overcurrent relays can be added to the protection schemes to provide overcurrent protection. This additional protection serves as a general backup protection in case of a failure of the main protection system. Figure 1 shows overcurrent and ear ...
PROPER OPERATION OF STEP VOLTAGE REGULATORS IN THE
... Figure 2 the Generator’s real power export is less than the customer demand (kWs) downstream of the SVR. The real power flow through the regulator bank is from left to right (Substation to Generator). With normal bi-directional sensing the regulator will be in Forward Mode, regulating the voltage at ...
... Figure 2 the Generator’s real power export is less than the customer demand (kWs) downstream of the SVR. The real power flow through the regulator bank is from left to right (Substation to Generator). With normal bi-directional sensing the regulator will be in Forward Mode, regulating the voltage at ...
Three-phase electric power
Three-phase electric power is a common method of alternating-current electric power generation, transmission, and distribution. It is a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power. It is also used to power large motors and other heavy loads. A three-phase system is usually more economical than an equivalent single-phase or two-phase system at the same line to ground voltage because it uses less conductor material to transmit electrical power.The three-phase system was independently invented by Galileo Ferraris, Mikhail Dolivo-Dobrovolsky, Jonas Wenström and Nikola Tesla in the late 1880s.