Electrical Energy - Blue Valley Schools
... You will measure the current through, and voltage across, a motor as it lifts a small mass. If you know the current and voltage, you can calculate another electrical quantity – power. The power used by an electrical device can be calculated from power = current voltage The unit of power is the wat ...
... You will measure the current through, and voltage across, a motor as it lifts a small mass. If you know the current and voltage, you can calculate another electrical quantity – power. The power used by an electrical device can be calculated from power = current voltage The unit of power is the wat ...
Group C
... The drill string needs to be kept stationary relative to the seabed. This is called “Heave compensation”. One way of to achieve heave compensation is through passive heave compensation, for example using a spring in the derrick. This has several disadvantages, so it is more common to use an Active ...
... The drill string needs to be kept stationary relative to the seabed. This is called “Heave compensation”. One way of to achieve heave compensation is through passive heave compensation, for example using a spring in the derrick. This has several disadvantages, so it is more common to use an Active ...
Dual-mode Beam Current Monitor
... reduction of the noise from the leakage field is necessary for a real use. The stability of contact resistance of the relay used for the mode switch is effective to the time constant of slow mode. If the resistance is not stable as expected for long period operation, the dual-mode operation becomes ...
... reduction of the noise from the leakage field is necessary for a real use. The stability of contact resistance of the relay used for the mode switch is effective to the time constant of slow mode. If the resistance is not stable as expected for long period operation, the dual-mode operation becomes ...
Choosing between a soft starter and a variable frequency drive to fit
... allow current. The SCRs are engaged during ramp up, and bypass contactors are pulled in after maximum speed is achieved. This helps to significantly reduce motor heating. ...
... allow current. The SCRs are engaged during ramp up, and bypass contactors are pulled in after maximum speed is achieved. This helps to significantly reduce motor heating. ...
Direct and External Modulation of Light
... to be deployed. So far, this order of magnitude for the bit rate is well above the needs of individual users and applications. Consequently, the data originating from a large number of users is multiplexed in time in the electrical domain before being transmitted at a high bit rate over optical fibr ...
... to be deployed. So far, this order of magnitude for the bit rate is well above the needs of individual users and applications. Consequently, the data originating from a large number of users is multiplexed in time in the electrical domain before being transmitted at a high bit rate over optical fibr ...
BU1-AC - AC-voltage relay
... At U< - tripping LED U< extinguishes, at U> - tripping. LED U> is steady lit. At voltages < 60 % Un no trip delay takes place. Technical data rated voltage Un: 110 V, 230 V, 400 V AC rated frequency range: 45 - 66 Hz power consumption in voltage circuit: 3.5 VA thermal load carrying capacity of the ...
... At U< - tripping LED U< extinguishes, at U> - tripping. LED U> is steady lit. At voltages < 60 % Un no trip delay takes place. Technical data rated voltage Un: 110 V, 230 V, 400 V AC rated frequency range: 45 - 66 Hz power consumption in voltage circuit: 3.5 VA thermal load carrying capacity of the ...
Electrical Meters, using
... voltage. The display will indicate which type of voltage you are touching with the leads. ...
... voltage. The display will indicate which type of voltage you are touching with the leads. ...
800-75 300 A Externally Operated Series Multiple (Dual Voltage
... 300 A Externally Operated Series Multiple (Dual Voltage) Switch GENERAL The Cooper Power Systems 300 A externally operated series multiple switch is used to change connection of de-energized transformer windings between series and parallel to provide different common transformer voltage ratios.The ...
... 300 A Externally Operated Series Multiple (Dual Voltage) Switch GENERAL The Cooper Power Systems 300 A externally operated series multiple switch is used to change connection of de-energized transformer windings between series and parallel to provide different common transformer voltage ratios.The ...
SmartStart:Solid State Starter
... compact design of SmartStart to accommodate a higher motor amp rating. ...
... compact design of SmartStart to accommodate a higher motor amp rating. ...
DC575 - LTC2410CGN Evaluation Kit Quick Start Guide
... One application that can benefit greatly from the LTC2410’s input resolution is current measurement. It is advantageous to use a very low resistance shunt to minimize the voltage drop. To demonstrate this, make a simple current shunt by soldering a 1inch length of 24 gauge copper wire from the IN+ t ...
... One application that can benefit greatly from the LTC2410’s input resolution is current measurement. It is advantageous to use a very low resistance shunt to minimize the voltage drop. To demonstrate this, make a simple current shunt by soldering a 1inch length of 24 gauge copper wire from the IN+ t ...
mmic amplifier biasing procedure
... for the drain-source and a negative supply for the gate-source. If there are multiple gate controls it is assumed for this procedure that they are connected together. Use knob style voltage power supplies – not key pad entry types. The supplies should be used in a floating manner with no connection ...
... for the drain-source and a negative supply for the gate-source. If there are multiple gate controls it is assumed for this procedure that they are connected together. Use knob style voltage power supplies – not key pad entry types. The supplies should be used in a floating manner with no connection ...
Multistage Transistor Amplifiers
... amplifier is coupled in some way to the input of the next stage. The resulting system is referred to as the multistage amplifier. In fact, a multistage amplifier consists of single amplifiers in which output of first stage is connected to the input of the second stage through a suitable coupling dev ...
... amplifier is coupled in some way to the input of the next stage. The resulting system is referred to as the multistage amplifier. In fact, a multistage amplifier consists of single amplifiers in which output of first stage is connected to the input of the second stage through a suitable coupling dev ...
05 - CERN Indico
... 60kV/40mA bi-polar power supply from Heinzinger as possible replacement solution of the custom-built ASTEC power supply On most targets the recovery time specification ...
... 60kV/40mA bi-polar power supply from Heinzinger as possible replacement solution of the custom-built ASTEC power supply On most targets the recovery time specification ...
Product PDF
... platform, hanging scale, or other eccentric loading applications. It is one of the most compact designs available for these capacities which makes it especially well suited to scales which weigh people as well as high capacity industrial applications where space is limited. ...
... platform, hanging scale, or other eccentric loading applications. It is one of the most compact designs available for these capacities which makes it especially well suited to scales which weigh people as well as high capacity industrial applications where space is limited. ...
Purchasing your Aerovox Capacitor cells from ARCO today…
... non-linear load. The most common non-linear load is a pulse rectifier, which is used in most switch mode power supplies, variable speed drives and uninterruptible power supplies. The distorted current waveform generates a distorted source voltage due to the system (electrical power system) impedance ...
... non-linear load. The most common non-linear load is a pulse rectifier, which is used in most switch mode power supplies, variable speed drives and uninterruptible power supplies. The distorted current waveform generates a distorted source voltage due to the system (electrical power system) impedance ...
Pulse-width modulation
Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.