DC and AC Sensor Type EMVI 401ED
... an inverse field of the secondary current I2. This principle is maintained by an electronic control circuit which detects the residual field caused by the two currents and regulates it to a minimum by altering the secondary current. The secondary current then is a very exact image of the primary cur ...
... an inverse field of the secondary current I2. This principle is maintained by an electronic control circuit which detects the residual field caused by the two currents and regulates it to a minimum by altering the secondary current. The secondary current then is a very exact image of the primary cur ...
Voltage/current dividers
... right, if RL is attached in parallel with R2, the voltage across R1 doubles. What is the value of RL? From the two expressions for v’R1 ...
... right, if RL is attached in parallel with R2, the voltage across R1 doubles. What is the value of RL? From the two expressions for v’R1 ...
Grid Management Voltage Control Distribution Grid Voltage
... by design, or other adjustment by installers, some inverters are not configured in this fashion and inverter connection point voltages of up to 132 V (maximum inverter voltage according to IEEE 1547 before antiislanding protection operates) have been observed. These voltage levels are outside ANSI C ...
... by design, or other adjustment by installers, some inverters are not configured in this fashion and inverter connection point voltages of up to 132 V (maximum inverter voltage according to IEEE 1547 before antiislanding protection operates) have been observed. These voltage levels are outside ANSI C ...
Power Electronic Device Protection (VFD, Drive Protection)
... evenly. IGBTs share energy very well during long duration pulses, but during short duration, high amplitude faults most of the energy is being carried by an individual bonding wire or contact. Current fuse technology cannot effectively protect the bonding wires of IGBT based equipment from overcurre ...
... evenly. IGBTs share energy very well during long duration pulses, but during short duration, high amplitude faults most of the energy is being carried by an individual bonding wire or contact. Current fuse technology cannot effectively protect the bonding wires of IGBT based equipment from overcurre ...
here
... off. But for this exercise you are to control the motor with a signal that is proportional to another, analog, signal. To do this you will use a technique called pulse width modulation, or PWM. This technique is useful because transistors can be used either fully on (voltage is close to zero, so pow ...
... off. But for this exercise you are to control the motor with a signal that is proportional to another, analog, signal. To do this you will use a technique called pulse width modulation, or PWM. This technique is useful because transistors can be used either fully on (voltage is close to zero, so pow ...
Unit 39.pps
... Indoor fan must be on when the compressor is operating Outdoor fan is often on when compressor operates Indoor fan may operate continuously Thermostat – Operating control High-pressure switch – Safety control ...
... Indoor fan must be on when the compressor is operating Outdoor fan is often on when compressor operates Indoor fan may operate continuously Thermostat – Operating control High-pressure switch – Safety control ...
EE25 RJIT PAPER
... been widely available for high-power high-voltage applications such as uninterruptible power supplies, flexible ac transmission systems, and HVDC. Where as conventional two-level inverter have some limitations in high-power high-voltage applications due to switching losses and power ratings [1-2]. B ...
... been widely available for high-power high-voltage applications such as uninterruptible power supplies, flexible ac transmission systems, and HVDC. Where as conventional two-level inverter have some limitations in high-power high-voltage applications due to switching losses and power ratings [1-2]. B ...
design of coal mine ventilator intelligent monitoring system
... code execution at maximum clock rate. For critical code size applications, the alternative 16-bit Thumb Mode reduces code by more than 30% with minimal performance penalty. With their compact 64 pin package, low power consumption, various 32-bit timers, 4- channel 10-bit ADC, USB PORT,PWM channels a ...
... code execution at maximum clock rate. For critical code size applications, the alternative 16-bit Thumb Mode reduces code by more than 30% with minimal performance penalty. With their compact 64 pin package, low power consumption, various 32-bit timers, 4- channel 10-bit ADC, USB PORT,PWM channels a ...
- Yokogawa
... 701917 DC to 50 MHz 701918 DC to 120 MHz Low noise compact current probe for measuring low level currents from 1 mA to 5 A. Best suited for design and verification applications requiring high-sensitivity at low currents. High-sensitivity (10x more sensitive than previous models) In comparison with e ...
... 701917 DC to 50 MHz 701918 DC to 120 MHz Low noise compact current probe for measuring low level currents from 1 mA to 5 A. Best suited for design and verification applications requiring high-sensitivity at low currents. High-sensitivity (10x more sensitive than previous models) In comparison with e ...
Specification Sheet
... 66 dB(A) during weekly engine exercise and 72 dB(A) during full-speed generator diagnostics and normal operation. The lowest point sound levels are 63 dB(A) and 68 dB(A) respectively as compared to competitor ratings.* All sound levels are measured at 7 meters with no load. * Lowest of 8 points meas ...
... 66 dB(A) during weekly engine exercise and 72 dB(A) during full-speed generator diagnostics and normal operation. The lowest point sound levels are 63 dB(A) and 68 dB(A) respectively as compared to competitor ratings.* All sound levels are measured at 7 meters with no load. * Lowest of 8 points meas ...
KG2317111721
... have found wide applications in the industry. The most popular configuration uses voltage source inverter (VSI) with a diode rectifier as the front end for adjustable speed drives (ASDs), uninterruptible power supplies (UPS), and other industrial applications. This configuration features low cost an ...
... have found wide applications in the industry. The most popular configuration uses voltage source inverter (VSI) with a diode rectifier as the front end for adjustable speed drives (ASDs), uninterruptible power supplies (UPS), and other industrial applications. This configuration features low cost an ...
What is a Kelvin connection and when should it be
... A Kelvin connection is a means of making precision electrical potential contact with a current carrying component or reference point in such a way that eliminates or greatly reduces the effect of contact resistance. This is especially important when dealing with low milli-volt reference voltages wit ...
... A Kelvin connection is a means of making precision electrical potential contact with a current carrying component or reference point in such a way that eliminates or greatly reduces the effect of contact resistance. This is especially important when dealing with low milli-volt reference voltages wit ...
Apprentice Electrical Technician Test (ETT) Preparation Guide
... Attachment 1 contains sample questions for the person to have some idea of what to expect. It, by no means, is a complete test and is only a tool for the person to determine how much preparation is needed. Materials Covered on the Test 1. Electrical Theory - 19 questions a. ...
... Attachment 1 contains sample questions for the person to have some idea of what to expect. It, by no means, is a complete test and is only a tool for the person to determine how much preparation is needed. Materials Covered on the Test 1. Electrical Theory - 19 questions a. ...
Lab 5 Document (Word)
... resistors R5 and R8. This circuit has a dc gain of 5.6 and inverts the output with respect to the input signal. The IC U4 is a non-inverting voltage comparator that acts as the pulse width modulator. The triangle wave enter the device on the inverting input and the control voltage, Vc, enters on the ...
... resistors R5 and R8. This circuit has a dc gain of 5.6 and inverts the output with respect to the input signal. The IC U4 is a non-inverting voltage comparator that acts as the pulse width modulator. The triangle wave enter the device on the inverting input and the control voltage, Vc, enters on the ...
Variable-frequency drive
A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.