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L-20(NKD)
L-20(NKD)

... + 60° , the reading of the first wattmeter, W1 decreases from a certain positive value to zero (0). But the reading of the second wattmeter, W2 increases from a certain positive value to positive maximum, as the lagging power factor is decreased from 1.0 to 0.866 ( = cos 30°) , with φ increasing fro ...
customer service standards for connection
customer service standards for connection

... This document seeks to make customers aware of the electrical environment in which their equipment operates and draw their attention to the limitations of electricity supplied by Endeavour Energy under normal operating conditions. For example, a significant proportion of Endeavour Energy’s distribut ...
LSA 43.2/44.2 - 4 POLES
LSA 43.2/44.2 - 4 POLES

... - There is no short-circuit phase-phase or phase-neutral between the alternator output terminals and the generator set control cabinet (part of the circuit not protected by circuitbreakers or relays in the cabinet). - The machine should be connected with the busbar separating the terminals as shown ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

3200 - transmille.net
3200 - transmille.net

... the calibration of RCD testers safe & straight forward, which can otherwise be quite difficult and even dangerous. To calibrate an RCD tester, it is necessary to measure the current taken from the mains supply by the tester on each of its ranges and the time period measured shown on the testers disp ...
Ground Fault Protection on neon secondaries
Ground Fault Protection on neon secondaries

Atmel LED Drivers MSL4163/MSL4164
Atmel LED Drivers MSL4163/MSL4164

... string intensity control for up to 16 interconnected devices to allow active area dimming. The devices include an advanced PWM engine that easily synchronizes to a video signal, and per-string phase adjustment to reduce unwanted LCD artifacts such as motion blur. Additionally, an on-chip EEPROM allo ...
2N3906
2N3906

... Distributors who are listed by country on our web page cited above. Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild's quality standards for handling and storage and provide access to Fairchild's ...
2SC5001
2SC5001

... 2) Before you use our Products, please contact our sales representative and verify the latest specifications : 3) Although ROHM is continuously working to improve product reliability and quality, semiconductors can break down and malfunction due to various factors. Therefore, in order to prevent per ...
Low Power Design with CoolRunner-II CPLDs Summary
Low Power Design with CoolRunner-II CPLDs Summary

... CoolCLOCK reduces power consumed by the global clock net by dividing the external clock frequency by 2 before it is applied to the global clock network. This clock division occurs early in the clock tree near the clock input buffer so that the divided clock affects the majority of the clock network. ...
SC446 - Semtech
SC446 - Semtech

... with an integrated boost converter. It operates over a wide input range from 4.5V to 27V with a maximum output voltage of 36V and a 2.5A internal power switch. It can drive up to thirty WLEDs in 3 strings with current up to 100mA per string. The string-to-string current matching is 2% typical, 3% ma ...
Policies for Dynamic Clock Scheduling
Policies for Dynamic Clock Scheduling

BD95514MUV
BD95514MUV

... BD95514MUV is a switching regulator capable of supplying high current output (up to 4A) at low output voltages (0.7V~5.0V) over a broad range of input voltages (4.5V~28V). The regulator features an internal N-MOSFET power transistor for high ...
PAM2842 Description Pin Assignments
PAM2842 Description Pin Assignments

REG711-25 数据资料 dataSheet 下载
REG711-25 数据资料 dataSheet 下载

... voltage from an unregulated input voltage. A wide input supply voltage of 1.8V to 5.5V makes the REG711 ideal for a variety of battery sources, such as single cell Li-Ion, or two and three cell Nickel or Alkaline based chemistries. The input voltage may vary above and below the output voltage and th ...
SLUS746 120-V Boot, 3-A Peak, High Frequency, High
SLUS746 120-V Boot, 3-A Peak, High Frequency, High

P84824
P84824

... CAUTION: Check the installation instructions of the manufacturers of other equipment used in the system for any guidelines or restrictions on wiring and/or locating Notification Appliance Circuits (NAC) and notification appliances. Some system communication circuits and/or audio circuits, for exampl ...
AK4520A 100dB 20Bit Stereo ADC & DAC ∆Σ
AK4520A 100dB 20Bit Stereo ADC & DAC ∆Σ

Chapter 15 Input Filter Design
Chapter 15 Input Filter Design

... Today, almost all modern equipment uses some sort of power conditioning. There are a lot of different circuit topologies used. When you get to the bottom line, all power conditioning requires some kind of an input filter. The input LC filter has become very critical in its design and must be designe ...
X - CDMS
X - CDMS

... with the Q output LOW, and the timing capacitor CEXT completely charged to VCC. When the trigger input A goes from VCC to GND (while inputs B and clear are held to VCC) a valid trigger is recognized, which turns on comparator C1 and Nchannel transistor N11. At the same time the output latch is set. ...
MAX40200 - Part Number Search
MAX40200 - Part Number Search

... 60mV for every 10 times change in current through it. Similar to a normal diode, the MAX40200 also becomes resistive as the forward current exceeds the specified limit (see Figure 1). Unlike a normal diode, should the MAX40200 exceed the specified temperature, it will turn off in order to protect it ...
A Survey of Non-conventional Techniques for Low
A Survey of Non-conventional Techniques for Low

... Integrated circuit (IC) technologies trend toward reduction of the minimum feature size of MOS transistors, ...
BDTIC ™ Compact
BDTIC ™ Compact

... VB and VS (High Side Supplies) ........................................................................................................ 11 LO and HO (Low and High Side Outputs) .......................................................................................... 11 Undervoltage lockout (UVLO) . ...
APT Surge Snubber Specification Word Document
APT Surge Snubber Specification Word Document

I C E 3 A R x x 8 0...
I C E 3 A R x x 8 0...

... Soft Start .................................................................................................................................... 9 Low standby power - Active Burst Mode ..................................................................................... 9 Entering Active Burst Mode w ...
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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.
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