Unique Design of Communications & Data Spool Saves News Release
... HIGHLAND, IL July 12, 2011 – An innovative new cable management spool for communications and data applications is now available from Cooper B-Line, a global provider of innovative, labor-saving support systems and enclosure solutions for engineered facility subsystem applications. Like many other pr ...
... HIGHLAND, IL July 12, 2011 – An innovative new cable management spool for communications and data applications is now available from Cooper B-Line, a global provider of innovative, labor-saving support systems and enclosure solutions for engineered facility subsystem applications. Like many other pr ...
A 40 meters CW QRP Transceiver
... The XTAL filter A particular care was dedicated to the filter design, in fact I wanted to obtain a device suited also for SSB reception. I chose a ladder 4 poles design, employing some cheap 4.433 MHz crystals for TV use. In this manner I obtained a 1.8 KHz bandpass, an acceptable compromise to rece ...
... The XTAL filter A particular care was dedicated to the filter design, in fact I wanted to obtain a device suited also for SSB reception. I chose a ladder 4 poles design, employing some cheap 4.433 MHz crystals for TV use. In this manner I obtained a 1.8 KHz bandpass, an acceptable compromise to rece ...
Electricity and Magnetism, Part 4 Rationale:
... • Can we use the motion produced by running a current through a coil near a permanent magnet to do work? (Yes, this is the principle of a motor.) • Have students build the motor2,8. (When operating the motors, take care that the batteries are not connected too long (overheated wires and battery life ...
... • Can we use the motion produced by running a current through a coil near a permanent magnet to do work? (Yes, this is the principle of a motor.) • Have students build the motor2,8. (When operating the motors, take care that the batteries are not connected too long (overheated wires and battery life ...
Inductance
... The coefficient of coupling is increased by placing the coils close together, possibly with one wound on top of the other, by placing them parallel, or by winding the coils on a common core. A high value of k, called tight coupling, allows the current in one coil to induce more voltage in the ot ...
... The coefficient of coupling is increased by placing the coils close together, possibly with one wound on top of the other, by placing them parallel, or by winding the coils on a common core. A high value of k, called tight coupling, allows the current in one coil to induce more voltage in the ot ...
Page 276 - Stoody Industrial and Welding Supply
... AIR-PLASMA CUTTING SYSTEMS – Thermal Arc power supplies deliver exceptionally smooth, powerful cutting current. SMART START™, AUTO PILOT RESTART – Instantly reignites pilot arc when the cutting arc is interrupted, such as when cutting expanded metal. 1TORCH™ SERIES 70° HAND TORCH - WITH A 20 Ft. CAB ...
... AIR-PLASMA CUTTING SYSTEMS – Thermal Arc power supplies deliver exceptionally smooth, powerful cutting current. SMART START™, AUTO PILOT RESTART – Instantly reignites pilot arc when the cutting arc is interrupted, such as when cutting expanded metal. 1TORCH™ SERIES 70° HAND TORCH - WITH A 20 Ft. CAB ...
Wireless powering of single-chip systems with integrated coil
... efficiency of inductive power transfer is not very high when the distance is larger than the size of the transmitting coil. However, since it provides a means for power supply without need of power cords or batteries, this technique is finding widespread application in small low power electronic dev ...
... efficiency of inductive power transfer is not very high when the distance is larger than the size of the transmitting coil. However, since it provides a means for power supply without need of power cords or batteries, this technique is finding widespread application in small low power electronic dev ...
Aalborg Universitet Full Scale Test on a 100km, 150kV AC Cable Stella
... To simulate the system it was used PSCAD/EMTDC. The influences of the cable semiconductive layers were considered by changing the insulation permittivity [4]. The conductor and screen resistances were corrected to consider respectively the 81 segments of the conductor and the number of copper wires ...
... To simulate the system it was used PSCAD/EMTDC. The influences of the cable semiconductive layers were considered by changing the insulation permittivity [4]. The conductor and screen resistances were corrected to consider respectively the 81 segments of the conductor and the number of copper wires ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... frequency is increased. Also, since power loss increases as resistance increases, power losses increase with an increase in frequency because of skin effect. Copper losses can be minimized and conductivity increased in an rf line by plating the line with silver. Since silver is a better conductor th ...
... frequency is increased. Also, since power loss increases as resistance increases, power losses increase with an increase in frequency because of skin effect. Copper losses can be minimized and conductivity increased in an rf line by plating the line with silver. Since silver is a better conductor th ...
Aalborg Universitet
... order to reduce visual pollution, the Danish government has decided to replace the existing 132/150 kV overhead line system with HVAC power cables [4]. This introduces new difficulties as a high voltage cable possesses 20-50 times higher capacitance per unit length compared to an equivalent overhead ...
... order to reduce visual pollution, the Danish government has decided to replace the existing 132/150 kV overhead line system with HVAC power cables [4]. This introduces new difficulties as a high voltage cable possesses 20-50 times higher capacitance per unit length compared to an equivalent overhead ...
Guidelines for Installation of Spyder BACnet Controllers
... In order to guarantee proper BACnet communication, the voltage on the COM terminal of every device must be noise free and within 200mV on every device. The best way to ensure this is to tie the second leg of the transformer secondary to a known good ground. Occasionally, the local ground may not be ...
... In order to guarantee proper BACnet communication, the voltage on the COM terminal of every device must be noise free and within 200mV on every device. The best way to ensure this is to tie the second leg of the transformer secondary to a known good ground. Occasionally, the local ground may not be ...
ABSTRACT transmission line aspects of windings yields attenuation and
... distortion effects which, are highly dependent on frequency. The result is that She PD test on complete windings is at best comparative, and is definitely not absolute. This paper reviews the research that shows the problems caused by the inductive nature of stator windings, and discusses the implic ...
... distortion effects which, are highly dependent on frequency. The result is that She PD test on complete windings is at best comparative, and is definitely not absolute. This paper reviews the research that shows the problems caused by the inductive nature of stator windings, and discusses the implic ...
Guitar Pickup Theory
... also depends on the height of the peak, of course. A high peak produces a powerful, characteristic sound; a low peak produces a weaker sound, especially with solid body guitars that have no acoustic body resonance. The height of the peak of most available pickups ranges between 1 and 4 (0 to 12 dB), ...
... also depends on the height of the peak, of course. A high peak produces a powerful, characteristic sound; a low peak produces a weaker sound, especially with solid body guitars that have no acoustic body resonance. The height of the peak of most available pickups ranges between 1 and 4 (0 to 12 dB), ...
Document
... Specifically, the coefficient of coupling is k = flux linkages between L1 and L2 divided by flux produced by L1 There are no units for k, because it is a ratio of two values of magnetic flux. The value of k is generally stated as a decimal fraction. ...
... Specifically, the coefficient of coupling is k = flux linkages between L1 and L2 divided by flux produced by L1 There are no units for k, because it is a ratio of two values of magnetic flux. The value of k is generally stated as a decimal fraction. ...
85-0065—01 - RP418A-C, RP818A, B Electric
... through Ports 1 and 3 to the damper operator. With the fan off, the supply Port 1 is blocked. Ports 2 and 3 are connected, bleeding the air from the damper operator to atmosphere. ...
... through Ports 1 and 3 to the damper operator. With the fan off, the supply Port 1 is blocked. Ports 2 and 3 are connected, bleeding the air from the damper operator to atmosphere. ...
module – 4
... Advantages of three phase system: In the three phase system, the alternator armature has three windings and it produces three independent alternating voltages. The magnitude and frequency of all of them is equal but they have a phase difference of 1200 between each other. Such a three phase system h ...
... Advantages of three phase system: In the three phase system, the alternator armature has three windings and it produces three independent alternating voltages. The magnitude and frequency of all of them is equal but they have a phase difference of 1200 between each other. Such a three phase system h ...
technical brief - Enphase Energy
... designation. Typically used for residential applications, 240VAC cabling includes four conductors. Threephase 208VAC cabling includes five conductors and is used for most commercial installations. Because Enphase microinverters output onto two phases, three phase cabling balances the phases by rotat ...
... designation. Typically used for residential applications, 240VAC cabling includes four conductors. Threephase 208VAC cabling includes five conductors and is used for most commercial installations. Because Enphase microinverters output onto two phases, three phase cabling balances the phases by rotat ...
Experiment FT2: Measurement of Inductance and Mutual Inductance
... voltage can be higher or lower than the primary circuit voltage according to a fixed ratio. This ratio is equal to the ratio of the number of turns of the secondary winding to that of primary winding, i.e. N2 / N1. This ratio is known as the Voltage Transformation Ratio, K. One method to measure sel ...
... voltage can be higher or lower than the primary circuit voltage according to a fixed ratio. This ratio is equal to the ratio of the number of turns of the secondary winding to that of primary winding, i.e. N2 / N1. This ratio is known as the Voltage Transformation Ratio, K. One method to measure sel ...
cired reduction factor of feeding lines that have a cable and an
... well as all of the potential differences significant for the safety conditions (touch and step voltages) are proportional to the current emanating from the substation grounding system into the surrounding earth. It is known that only a part of the total fault current flows into the earth, and the re ...
... well as all of the potential differences significant for the safety conditions (touch and step voltages) are proportional to the current emanating from the substation grounding system into the surrounding earth. It is known that only a part of the total fault current flows into the earth, and the re ...
As we discussed earlier capacitors and coils resist the flow
... squared. “X” is found by combining XC with XL. Lets say we have an capacitive reactance of –j300 and an inductive reactance of +j400. When combined they would equal +j100. Lets say our circuit has 150 ohms of resistance. Placing these values in the formula we would have an impedance of 180.28 ohms. ...
... squared. “X” is found by combining XC with XL. Lets say we have an capacitive reactance of –j300 and an inductive reactance of +j400. When combined they would equal +j100. Lets say our circuit has 150 ohms of resistance. Placing these values in the formula we would have an impedance of 180.28 ohms. ...
Gregg Catalogue Page G092
... For XR-AlumaFeed, MPa Plus feeders, and 60M feeders. 11-conductors to support contactor control and remote voltage control on all Miller® electronic CV 14-pin power sources. Additional functions supported when using the Invision MPa or XMT MPa power sources include synergic Pulsed MIG, remote proces ...
... For XR-AlumaFeed, MPa Plus feeders, and 60M feeders. 11-conductors to support contactor control and remote voltage control on all Miller® electronic CV 14-pin power sources. Additional functions supported when using the Invision MPa or XMT MPa power sources include synergic Pulsed MIG, remote proces ...
Loading coil
A loading coil or load coil is an inductor that is inserted into an electronic circuit to increase its inductance. A loading coil is not a transformer to provide coupling to another other circuit. The term originated in the 19th century for inductors used to prevent signal distortion in long-distance telegraph transmission cables. The term is also used for inductors in radio antennas, or between the antenna and its feedline, to make an electrically short antenna resonant at its operating frequency.Loading coils are historically also known as Pupin coils after Mihajlo Pupin, especially when used for the Heaviside condition and the process of inserting them is sometimes called pupinization.The concept of loading coils was discovered by Oliver Heaviside in studying the problem of slow signalling speed of the first transatlantic telegraph cable in the 1860s. He concluded additional inductance was required to prevent amplitude and time delay distortion of the transmitted signal. The mathematical condition for distortion-free transmission is known as the Heaviside condition. Previous telegraph lines were overland or shorter and hence had less delay, and the need for extra inductance was not as great. Submarine communications cables are particularly subject to the problem, but early 20th century installations using balanced pairs were often continuously loaded with iron wire or tape rather than discretely with loading coils, which avoided the sealing problem.