IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
... load requirement [1-3]. In an electric power system, a load with a low power factor draws more current than a load and causes more energy losses in the distribution system which require the larger wires and other heavy equipments which costs more to the industrialist as well as to the other commerci ...
... load requirement [1-3]. In an electric power system, a load with a low power factor draws more current than a load and causes more energy losses in the distribution system which require the larger wires and other heavy equipments which costs more to the industrialist as well as to the other commerci ...
1- Harmonic Sources from Commercial Loads
... the advantage of relatively simple control systems. Compared with ac drive systems, the dc drive offers a wider speed range and higher starting torque. However, purchase and maintenance costs for dc motors are high, while the cost of power electronic devices has been dropping year after year. Most d ...
... the advantage of relatively simple control systems. Compared with ac drive systems, the dc drive offers a wider speed range and higher starting torque. However, purchase and maintenance costs for dc motors are high, while the cost of power electronic devices has been dropping year after year. Most d ...
Switching Power Supplies and RF noise
... to be limited. It will be seen that these two requirements are conflicting. NOTE: In some cases, to prevent electric shock hazard due to abnormal leakage current (like in marinas, spas, hot tubs, wet spaces etc.), the AC outlet circuits / receptacles in these areas are served through a GFCI ( Ground ...
... to be limited. It will be seen that these two requirements are conflicting. NOTE: In some cases, to prevent electric shock hazard due to abnormal leakage current (like in marinas, spas, hot tubs, wet spaces etc.), the AC outlet circuits / receptacles in these areas are served through a GFCI ( Ground ...
High-Side Power Monitor Measures Both Current and Voltage up to
... MILPITAS, CA – February 18, 2008 – Linear Technology Corporation introduces the LTC4151, a high side power monitor that measures current and input voltages from 7V to 80V. The LTC4151 utilizes an internal 12-bit ADC to continuously measure both high side current and input voltage to give a true powe ...
... MILPITAS, CA – February 18, 2008 – Linear Technology Corporation introduces the LTC4151, a high side power monitor that measures current and input voltages from 7V to 80V. The LTC4151 utilizes an internal 12-bit ADC to continuously measure both high side current and input voltage to give a true powe ...
rack mounting power supplies - dual tracking outputs
... are not objectionable, local sensing can be used; leave in place the jumpers provided with the power supply on the barrier strip (connecting the +SENS to the +V terminal and the -SENS to the -V terminal). However, if the best possible regulation at the load is required, then remove the jumpers and u ...
... are not objectionable, local sensing can be used; leave in place the jumpers provided with the power supply on the barrier strip (connecting the +SENS to the +V terminal and the -SENS to the -V terminal). However, if the best possible regulation at the load is required, then remove the jumpers and u ...
OVERVIEW OF THE ELECTROFLOW POWER QUALITY SYSTEM
... quantity. The result is to balance the network load over the three phases. Additionally, voltage is adjusted to the most efficient level for proper motor and electrical equipment operation. Broadband Harmonics Reduction - One of the stages within the mainframe system performs broadband harmonic reso ...
... quantity. The result is to balance the network load over the three phases. Additionally, voltage is adjusted to the most efficient level for proper motor and electrical equipment operation. Broadband Harmonics Reduction - One of the stages within the mainframe system performs broadband harmonic reso ...
HigH-Power Current AmPliFier Applications F6300 Features
... proven, state-of-the-art design provide laboratory accuracy without compromising field performance. ...
... proven, state-of-the-art design provide laboratory accuracy without compromising field performance. ...
PHYS 1402 General Physics II EXPERIMENT 7C AC CIRCUITS I
... General Physics II EXPERIMENT 7C AC CIRCUITS I. OBJECTIVE: The objective of this experiment is to study the behavior of an RC series circuit subjected to an AC input. This will be done by measuring the circuit current and the voltages across the various circuits elements. Also the phase angle betwee ...
... General Physics II EXPERIMENT 7C AC CIRCUITS I. OBJECTIVE: The objective of this experiment is to study the behavior of an RC series circuit subjected to an AC input. This will be done by measuring the circuit current and the voltages across the various circuits elements. Also the phase angle betwee ...
A Solid State Replacement for the 62 set dynamotor
... base RC values. The output voltage of this is used to switch on and off alternately a pair of TIP3055s. These alternately earth either end of the two 9v windings connected as a 9V-0-9V primary, with the +12V supply applied to the centre. (It is important to connect the windings in the correct phase ...
... base RC values. The output voltage of this is used to switch on and off alternately a pair of TIP3055s. These alternately earth either end of the two 9v windings connected as a 9V-0-9V primary, with the +12V supply applied to the centre. (It is important to connect the windings in the correct phase ...
lab sheet - Faculty of Engineering
... 2. Adjust the sending-end voltage E1 to 300 V and keep it constant for the reminder part of the experiment. Use a three-phase resistive load and increase the load in steps making sure that the loads are balanced. Take readings of sending end and receiving end voltages and powers, E1, Q1, P1, E2, Q2, ...
... 2. Adjust the sending-end voltage E1 to 300 V and keep it constant for the reminder part of the experiment. Use a three-phase resistive load and increase the load in steps making sure that the loads are balanced. Take readings of sending end and receiving end voltages and powers, E1, Q1, P1, E2, Q2, ...
PTD1 - Faculty of Engineering
... 2. Adjust the sending-end voltage E1 to 300 V and keep it constant for the reminder part of the experiment. Use a three-phase resistive load and increase the load in steps making sure that the loads are balanced. Take readings of sending end and receiving end voltages and powers, E1, Q1, P1, E2, Q2, ...
... 2. Adjust the sending-end voltage E1 to 300 V and keep it constant for the reminder part of the experiment. Use a three-phase resistive load and increase the load in steps making sure that the loads are balanced. Take readings of sending end and receiving end voltages and powers, E1, Q1, P1, E2, Q2, ...
lab sheet - Faculty of Engineering
... 2. Adjust the sending-end voltage E1 to 300 V and keep it constant for the reminder part of the experiment. Use a three-phase resistive load and increase the load in steps making sure that the loads are balanced. Take readings of sending end and receiving end voltages and powers, E1, Q1, P1, E2, Q2, ...
... 2. Adjust the sending-end voltage E1 to 300 V and keep it constant for the reminder part of the experiment. Use a three-phase resistive load and increase the load in steps making sure that the loads are balanced. Take readings of sending end and receiving end voltages and powers, E1, Q1, P1, E2, Q2, ...
document
... Direction of arrow on line is used to balance at Indicate direction of real power (MW) flow each bus13 102 MW 51 MVR ...
... Direction of arrow on line is used to balance at Indicate direction of real power (MW) flow each bus13 102 MW 51 MVR ...
Use the equations for electric power to
... Hopefully the fuse will blow. What if it does not? It can overload the wires, which will get hot and can start a fire. What do you do to prevent this from happening? Move one of the devices to another circuit. If the circuit is designed for a 30-A fuse, what will happen? If it has a heavier wire and ...
... Hopefully the fuse will blow. What if it does not? It can overload the wires, which will get hot and can start a fire. What do you do to prevent this from happening? Move one of the devices to another circuit. If the circuit is designed for a 30-A fuse, what will happen? If it has a heavier wire and ...
Document
... – Flicker is caused by load variations; for example arc welding, electrical smelters and klystron modulators ...
... – Flicker is caused by load variations; for example arc welding, electrical smelters and klystron modulators ...
Voltage Stability Assessment and Enhancement of a Large Power
... having significant induction motor loads can be manifested either in the form of delayed voltage recovery or in the form of voltage collapse. When a power system is subjected to a disturbance in the presence of considerable induction motor loads, static analysis alone is not sufficient to determine ...
... having significant induction motor loads can be manifested either in the form of delayed voltage recovery or in the form of voltage collapse. When a power system is subjected to a disturbance in the presence of considerable induction motor loads, static analysis alone is not sufficient to determine ...
Power factor
In electrical engineering, the power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit, and is a dimensionless number in the closed interval of -1 to 1. A power factor of less than one means that the voltage and current waveforms are not in phase, reducing the instantaneous product of the two waveforms (V x I). Real power is the capacity of the circuit for performing work in a particular time. Apparent power is the product of the current and voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a non-linear load that distorts the wave shape of the current drawn from the source, the apparent power will be greater than the real power. A negative power factor occurs when the device (which is normally the load) generates power, which then flows back towards the source, which is normally considered the generator.In an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. The higher currents increase the energy lost in the distribution system, and require larger wires and other equipment. Because of the costs of larger equipment and wasted energy, electrical utilities will usually charge a higher cost to industrial or commercial customers where there is a low power factor.Linear loads with low power factor (such as induction motors) can be corrected with a passive network of capacitors or inductors. Non-linear loads, such as rectifiers, distort the current drawn from the system. In such cases, active or passive power factor correction may be used to counteract the distortion and raise the power factor. The devices for correction of the power factor may be at a central substation, spread out over a distribution system, or built into power-consuming equipment.