IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... Power quality phenomena or power quality disturbance can be defined as the deviation of the voltage and the current from its ideal waveform voltage and the current its ideal waveform. [1]. Voltage sags last until network faults are cleared and typically range from a few milliseconds to several secon ...
... Power quality phenomena or power quality disturbance can be defined as the deviation of the voltage and the current from its ideal waveform voltage and the current its ideal waveform. [1]. Voltage sags last until network faults are cleared and typically range from a few milliseconds to several secon ...
Poster presentations given for ARCS
... Statistical design of experiments using Tukey’s test and 2x2 factorial designs have been used to determine what causes variation in dielectric constant and leakage flux within wafers and between batches of material. It appears that Cl2 and metal contamination in the 100 ppm range cause significant v ...
... Statistical design of experiments using Tukey’s test and 2x2 factorial designs have been used to determine what causes variation in dielectric constant and leakage flux within wafers and between batches of material. It appears that Cl2 and metal contamination in the 100 ppm range cause significant v ...
BCX5616Q Description Mechanical Data
... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
Gas-insulated switchgear up to 420 kV, 63 kA, 5000 A
... Reliable operation even under extreme environmental conditions Since 1974 we have supplied gas-insulated substations for voltage levels of up to 420 kV. Our current 8DQ1 switchgear, which is designed for rated voltages of up to 420 kV, meets all the requirements for modern, next-generation switchg ...
... Reliable operation even under extreme environmental conditions Since 1974 we have supplied gas-insulated substations for voltage levels of up to 420 kV. Our current 8DQ1 switchgear, which is designed for rated voltages of up to 420 kV, meets all the requirements for modern, next-generation switchg ...
DECS-200N Negative Forcing Digital Excitation Control System
... DECS-200N to meet specific operating characteristics and requirements for the machine under DECS-200N control. Two more methods of set point control may be achieved via the RS232 communication port by using the Windows® based PC software or by the RS-485 port using Modbus™ protocol. Regardless of wh ...
... DECS-200N to meet specific operating characteristics and requirements for the machine under DECS-200N control. Two more methods of set point control may be achieved via the RS232 communication port by using the Windows® based PC software or by the RS-485 port using Modbus™ protocol. Regardless of wh ...
Construct a Complete Circuit
... Construct a Circuit to Study Solar Electricity Production The photograph on the right illustrates how two multimeters, an electric appliance, lead wires and a photovoltaic module form an electric circuit that can be used to collect current and voltage data. That data is needed to calculate how much ...
... Construct a Circuit to Study Solar Electricity Production The photograph on the right illustrates how two multimeters, an electric appliance, lead wires and a photovoltaic module form an electric circuit that can be used to collect current and voltage data. That data is needed to calculate how much ...
Aug 2002 Power Op Amp Protects Load Circuitry with Precise Current Limiting
... to the current limit control inputs, forcing a drastic reduction in output current. Resistors R1, R2 and R3 in this example set the current limit control at 2V max and 200mV min. Should the load current ever exceed the predetermined maximum limit, the output current snaps back to the min level. The ...
... to the current limit control inputs, forcing a drastic reduction in output current. Resistors R1, R2 and R3 in this example set the current limit control at 2V max and 200mV min. Should the load current ever exceed the predetermined maximum limit, the output current snaps back to the min level. The ...
History of CDMA - 123SeminarsOnly.com
... So far, we have assumed that CDMA timing is absolutely exact, that is, transmitters exactly transmit at points in multiples of the length of the chip sequence. Of course, in reality, this is impractical to achieve, so all forms of CDMA use spread spectrum process gain to allow receivers to partially ...
... So far, we have assumed that CDMA timing is absolutely exact, that is, transmitters exactly transmit at points in multiples of the length of the chip sequence. Of course, in reality, this is impractical to achieve, so all forms of CDMA use spread spectrum process gain to allow receivers to partially ...
a High Accuracy Ultralow I , 500 mA anyCAP
... When adding a noise reduction capacitor, maintain a minimum load current of 1 mA when not in shutdown. It is important to note that as CNR increases, the turn-on time will be delayed. With CNR values greater than 1 nF, this delay may be on the order of several milliseconds. ...
... When adding a noise reduction capacitor, maintain a minimum load current of 1 mA when not in shutdown. It is important to note that as CNR increases, the turn-on time will be delayed. With CNR values greater than 1 nF, this delay may be on the order of several milliseconds. ...
typical performance curves (cont)
... and drift, so many circuits will not require external adjustment. Figure 3 shows the optional connection of an external potentiometer to adjust offset voltage. This adjustment should not be used to compensate for offsets created elsewhere in a system (such as in later amplification stages or in an A ...
... and drift, so many circuits will not require external adjustment. Figure 3 shows the optional connection of an external potentiometer to adjust offset voltage. This adjustment should not be used to compensate for offsets created elsewhere in a system (such as in later amplification stages or in an A ...
What’s in it for me?
... However, once islanding occurs, short circuit levels may drop significantly due to the absence of strong utility grid In this case, protection system designed for high fault currents will not respond and new protection strategies are required to ensure a safe islanding operation in a microgrid ...
... However, once islanding occurs, short circuit levels may drop significantly due to the absence of strong utility grid In this case, protection system designed for high fault currents will not respond and new protection strategies are required to ensure a safe islanding operation in a microgrid ...
Pulse-Width Modulation Control Circuits
... The TL494 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 ...
... The TL494 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 ...
June 2006 Dual Step-Up Converter Drives White LEDs with 1000:1
... the LEDs are turned off as the CTRL pin voltage is pulled below 75mV. Another method of reducing the brightness of the LEDs is digital PWM dimming. The PWM MOSFET in series with the LEDs creates the waveform shown in Figure 4 when the string of LEDs is PWM’d at 100mA constant current. During PWM on- ...
... the LEDs are turned off as the CTRL pin voltage is pulled below 75mV. Another method of reducing the brightness of the LEDs is digital PWM dimming. The PWM MOSFET in series with the LEDs creates the waveform shown in Figure 4 when the string of LEDs is PWM’d at 100mA constant current. During PWM on- ...
EM720 POWER QUALITY AND REVENUE METER
... 5. The secondary of an external current transformer must never be allowed to be open circuit when the ...
... 5. The secondary of an external current transformer must never be allowed to be open circuit when the ...
2014
... a) Explain speed-current, torque-current, speed-torque characteristics of a DC series motor. b) Prove that in a dc generator, generated e.m.f and current in a conductor are in the same direction, whereas in a dc motor, generated e.m.f opposes the flow of current in a conductor. (7M+8M) a) How is 4-p ...
... a) Explain speed-current, torque-current, speed-torque characteristics of a DC series motor. b) Prove that in a dc generator, generated e.m.f and current in a conductor are in the same direction, whereas in a dc motor, generated e.m.f opposes the flow of current in a conductor. (7M+8M) a) How is 4-p ...
dc transient analysis
... Any first – order circuit can be reduced to a Thévenin (or Norton) equivalent connected to either a single equivalent inductor or capacitor. RTh ...
... Any first – order circuit can be reduced to a Thévenin (or Norton) equivalent connected to either a single equivalent inductor or capacitor. RTh ...
1 - turboecelegends
... any given voltage input is that the op-amp will output a voltage very nearly equal to Vin, but just low enough so that there's enough voltage difference left between Vin and the (-) input to be amplified to generate the output voltage. The circuit will quickly reach a point of stability (known as eq ...
... any given voltage input is that the op-amp will output a voltage very nearly equal to Vin, but just low enough so that there's enough voltage difference left between Vin and the (-) input to be amplified to generate the output voltage. The circuit will quickly reach a point of stability (known as eq ...
24-bit Multifunction Temperature and Voltage Devices
... Designed for the USB bus, each device provides up to 32 analog input channels with 24-bit resolution, 8 digital I/O and two counter inputs. The USB-2416-4AO also features four analog outputs. Connect to the AI-EXP32 expansion device for an additional 32 channels of analog input and 16 digital I/O li ...
... Designed for the USB bus, each device provides up to 32 analog input channels with 24-bit resolution, 8 digital I/O and two counter inputs. The USB-2416-4AO also features four analog outputs. Connect to the AI-EXP32 expansion device for an additional 32 channels of analog input and 16 digital I/O li ...
Application Note 711 LM78S40 Switching Voltage Regulator
... used to control the on/off condition of the transistor power switch. The oscillator frequency is set by a single external capacitor and may be varied over a range of 100 Hz to 100 kHz. Most applications require an oscillator frequency from 20 kHz to 30 kHz. The oscillator duty cycle (ton/toff) is in ...
... used to control the on/off condition of the transistor power switch. The oscillator frequency is set by a single external capacitor and may be varied over a range of 100 Hz to 100 kHz. Most applications require an oscillator frequency from 20 kHz to 30 kHz. The oscillator duty cycle (ton/toff) is in ...
single-phase bridge rectifiers with voltage filters
... pure capacitive filters (C) or the inductive-capacitive filters (L-C → filters of the second order). By their use it is expected to obtain a DC voltage with a better form factor to supply the DC loads which are sensitive at this parameter as the power electronics converters which make the DC/DC conv ...
... pure capacitive filters (C) or the inductive-capacitive filters (L-C → filters of the second order). By their use it is expected to obtain a DC voltage with a better form factor to supply the DC loads which are sensitive at this parameter as the power electronics converters which make the DC/DC conv ...
Pulse-Width Modulation Control Circuits
... The TL494 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 ...
... The TL494 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 ...
Surge protector
A surge protector (or surge suppressor) is an appliance/device designed to protect electrical devices from voltage spikes. A surge protector attempts to limit the voltage supplied to an electric device by either blocking or by shorting to ground any unwanted voltages above a safe threshold. This article primarily discusses specifications and components relevant to the type of protector that diverts (shorts) a voltage spike to ground; however, there is some coverage of other methods.The terms surge protection device (SPD), or transient voltage surge suppressor (TVSS), are used to describe electrical devices typically installed in power distribution panels, process control systems, communications systems, and other heavy-duty industrial systems, for the purpose of protecting against electrical surges and spikes, including those caused by lightning. Scaled-down versions of these devices are sometimes installed in residential service entrance electrical panels, to protect equipment in a household from similar hazards.Many power strips have basic surge protection built in; these are typically clearly labeled as such. However, power strips that do not provide surge protection are sometimes erroneously referred to as ""surge protectors"".