generator protection
... shut down the generator. Fig xy shows the reactive power capability curve of a generator. It can be seen that in the lagging power factor-operating region, limits are determined either by rotor field heating limit or by stator armature heating limit. During the leading power factor-operating region, ...
... shut down the generator. Fig xy shows the reactive power capability curve of a generator. It can be seen that in the lagging power factor-operating region, limits are determined either by rotor field heating limit or by stator armature heating limit. During the leading power factor-operating region, ...
2-el phased array
... detuning can be done with lumped components or by changing the lengths of the elements ...
... detuning can be done with lumped components or by changing the lengths of the elements ...
ADS 1200 - connectinfo
... *) default, hardware tri-state detect (1V differential sense, not to be used together with line-biasing) **) logic high in the data directly drives the output enable (I.E. no delay). This setting is especially suitable for very low data rates. ...
... *) default, hardware tri-state detect (1V differential sense, not to be used together with line-biasing) **) logic high in the data directly drives the output enable (I.E. no delay). This setting is especially suitable for very low data rates. ...
LC Quadrature Generation in Integrated Circuits
... Figure 3. Symmetrical resistance reciprocal network Allpass filters can be realized in a number of different manners. These include single ended LC networks using ideal transformers or center tapped inductors, active circuits exploiting negative feedback and symmetrical cross coupled resistance reci ...
... Figure 3. Symmetrical resistance reciprocal network Allpass filters can be realized in a number of different manners. These include single ended LC networks using ideal transformers or center tapped inductors, active circuits exploiting negative feedback and symmetrical cross coupled resistance reci ...
Amateur Extra Licensing Class
... There are separate electric (E) and magnetic (H) field MPE limits because: Ground reflections and scattering make the field impedance vary with location. E field and H field radiation intensity peaks can occur at different locations. ...
... There are separate electric (E) and magnetic (H) field MPE limits because: Ground reflections and scattering make the field impedance vary with location. E field and H field radiation intensity peaks can occur at different locations. ...
HiFi Collective OTL Headphone Amplifier
... envelope) would fit the bill. In this case, each valve could be run at 25ma giving 100ma in total, and the combined gm would be 32ma/v giving a output impedance of 30 ohm. This sounds workable doesn’t it? Especially for the higher impedance headphones, and if we now add 12dB of feedback and we woul ...
... envelope) would fit the bill. In this case, each valve could be run at 25ma giving 100ma in total, and the combined gm would be 32ma/v giving a output impedance of 30 ohm. This sounds workable doesn’t it? Especially for the higher impedance headphones, and if we now add 12dB of feedback and we woul ...
Network Analysis and Synthesis
... • Comparing the two equations and assuming equal termination and normalizing the resistors to 1Ω, R1=R2=1Ω ...
... • Comparing the two equations and assuming equal termination and normalizing the resistors to 1Ω, R1=R2=1Ω ...
1⁄4-inch Preamps. Types 26AA, -AB, -AC, -AL
... 26AB, 26AC, 26AL and 26TC are small robust units optimised for acoustic measurements using condenser microphones. They have a very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz. All G.R.A.S. microphone preampliers are based on a small ceram ...
... 26AB, 26AC, 26AL and 26TC are small robust units optimised for acoustic measurements using condenser microphones. They have a very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz. All G.R.A.S. microphone preampliers are based on a small ceram ...
Amplifier Circuit
... operation of the amplifier are illustrated in Figure 3. Holes are drilled through the pads, and ground pins are soldered from the pads to the ground plane underneath. It is very important to ensure that ground pins are placed near to the grounding pins of the amplifier to reduce the high-frequency e ...
... operation of the amplifier are illustrated in Figure 3. Holes are drilled through the pads, and ground pins are soldered from the pads to the ground plane underneath. It is very important to ensure that ground pins are placed near to the grounding pins of the amplifier to reduce the high-frequency e ...
A new market for residual current protection
... In this article by David Pitt, Product Manager Circuit-Breakers, Eaton MEM, he looks at the opportunities provided by application of RCBOs to 110V power supplies, such as on building sites and the like: A range of combined miniature circuit-breakers and residual current devices (RCBOs) for use with ...
... In this article by David Pitt, Product Manager Circuit-Breakers, Eaton MEM, he looks at the opportunities provided by application of RCBOs to 110V power supplies, such as on building sites and the like: A range of combined miniature circuit-breakers and residual current devices (RCBOs) for use with ...
Practical Problems
... 7. A transformer has a primary winding of 800 turns and a secondary winding of 200 turns. When the load current on the secondary is 80 A at 0.8 power factor lagging, the primary current is 25 A at 0.707 power factor lagging. Determine graphically or otherwise the no-load current of the transformer a ...
... 7. A transformer has a primary winding of 800 turns and a secondary winding of 200 turns. When the load current on the secondary is 80 A at 0.8 power factor lagging, the primary current is 25 A at 0.707 power factor lagging. Determine graphically or otherwise the no-load current of the transformer a ...
Transmission Lines
... by a process of refinement to achieve essentially the same accuracy as Eq. (11.3.5). Starting with u computed from Eqs. (11.3.7) and (11.3.8), a value of Z is computed through Eq. (11.3.5). If that Z is more than, say, 0.2% off from the desired value of the line ...
... by a process of refinement to achieve essentially the same accuracy as Eq. (11.3.5). Starting with u computed from Eqs. (11.3.7) and (11.3.8), a value of Z is computed through Eq. (11.3.5). If that Z is more than, say, 0.2% off from the desired value of the line ...
Transmission Line Equations
... wires, with no voltage drop and no impedance associated to them (lumped impedance circuits). This is a reasonable procedure as long as the length of the wires is much smaller than the wavelength of the signal. At any given time, the measured voltage and current are the same for each location on the ...
... wires, with no voltage drop and no impedance associated to them (lumped impedance circuits). This is a reasonable procedure as long as the length of the wires is much smaller than the wavelength of the signal. At any given time, the measured voltage and current are the same for each location on the ...
A Practical Guide To Cable Selection
... the rate at which energy is absorbed by the dielectric. Reducing either of these factors results in better signal transmission performance. The plastic most commonly used for conductor insulation is polyvinylchloride (PVC). Its dielectric properties are good but, generally not good enough for any da ...
... the rate at which energy is absorbed by the dielectric. Reducing either of these factors results in better signal transmission performance. The plastic most commonly used for conductor insulation is polyvinylchloride (PVC). Its dielectric properties are good but, generally not good enough for any da ...
Nominal impedance
Nominal impedance in electrical engineering and audio engineering refers to the approximate designed impedance of an electrical circuit or device. The term is applied in a number of different fields, most often being encountered in respect of:The nominal value of the characteristic impedance of a cable or other form of transmission line.The nominal value of the input, output or image impedance of a port of a network, especially a network intended for use with a transmission line, such as filters, equalisers and amplifiers.The nominal value of the input impedance of a radio frequency antennaThe actual impedance may vary quite considerably from the nominal figure with changes in frequency. In the case of cables and other transmission lines, there is also variation along the length of the cable, if it is not properly terminated. It is usual practice to speak of nominal impedance as if it were a constant resistance, that is, it is invariant with frequency and has a zero reactive component, despite this often being far from the case. Depending on the field of application, nominal impedance is implicitly referring to a specific point on the frequency response of the circuit under consideration. This may be at low-frequency, mid-band or some other point and specific applications are discussed in the sections below.In most applications, there are a number of values of nominal impedance that are recognised as being standard. The nominal impedance of a component or circuit is often assigned one of these standard values, regardless of whether the measured impedance exactly corresponds to it. The item is assigned the nearest standard value.