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CT Polarity on SIPROTEC Relays Guide
CT Polarity on SIPROTEC Relays Guide

... The default setting is for the CT star point towards the line or protected object. The currents used in the relay algorithms and oscillographic records follow the convention that current into the line/protected object will be in-phase with the voltage (if zero power factor is assumed). If the starpo ...
PowerLab Owner`s Guide
PowerLab Owner`s Guide

... •• Many electrical systems (particularly those in metal enclosures) depend upon the presence of a protective earth for electrical safety. This is generally provided from the power outlet through a power cord, but may also be supplied as a dedicated safety earth conductor. Power cords should never be ...
2N7002DW - N-Channel Enhancement Mode Field Effect
2N7002DW - N-Channel Enhancement Mode Field Effect

... 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 ...
Digital Computer Solution of Electromagnetic
Digital Computer Solution of Electromagnetic

... The data requirements are then primarily for the annual peak load forecasts. It might be observed that the load model of the paper does not require that the occurrence N of a load level of Li MW be an integer value. This might be useful in specifying the peak load variation curve from historical dat ...
Aalborg Universitet Distributed energy resources in grid interactive AC microgrids
Aalborg Universitet Distributed energy resources in grid interactive AC microgrids

1W STEREO KA2209 AMPLIFIER MODULE (3087v2)
1W STEREO KA2209 AMPLIFIER MODULE (3087v2)

... If driving a pair of headphones, you may also require a 100 ohm resistor in series with each output to reduce the output level, depending on headphone impedance and sensitivity. Make sure you start with the volume right down to check. A number of headphones may be driven from the one amplifier if yo ...
Slide 1
Slide 1

... disconnect and reconnect the supply. The push button is used to restore the supply if it was shut down by the contactor according to the company’s instructions through the communication media and the system software, after removing the cause of disconnection. ...
RF5765 2.4GHz to 2.5GHz 802.11b/g/n WiFi FRONT-END MODULE Features
RF5765 2.4GHz to 2.5GHz 802.11b/g/n WiFi FRONT-END MODULE Features

... return loss at the RX output. For best performance and trade off between critical parameters such as NF, Gain, and IP3, the total inductance including board trace should be approximately 1.2nH. The 5.6kΩ series resistor for the Bluetooth® control line helps to prevent unwanted signal from coupling t ...
BD8313HFN
BD8313HFN

... The internal counter is in synch with OSC, the latch circuit is activated about 4 msec after the counter counts about 4000 oscillations to turn off DC/DC converter output. To reset the latch circuit, turn off the STB pin once. Then, turn it on again or turn on the power supply voltage again. 5 OSC C ...
MAX9060–MAX9064 Ultra-Small, Low-Power Single Comparators in 4-Bump UCSP and 5 SOT23 General Description
MAX9060–MAX9064 Ultra-Small, Low-Power Single Comparators in 4-Bump UCSP and 5 SOT23 General Description

... devices maintain high impedance at the inputs even when powered down (VCC or VREF = 0V). They also feature internal filtering to provide high RF immunity. The MAX9060 and MAX9061 have open-drain outputs and draw quiescent supply current from a user-supplied reference voltage, VREF, between 0.9V and ...
Project Proposal.pdf
Project Proposal.pdf

... With the intent of creating a highly power dense integrated power electronic modules cold plates have matured into a common cooling technique. Unless properly designed, high rates of heat generation result in high operating temperatures for electronic equipment, which then jeopardizes its safety and ...
Printer Carriage Motion Control
Printer Carriage Motion Control

... contact, operated by a push-button directly or via a pivoted cantilever. Micro-switches find use in many consumer products such as notebook computers, appliances (to detect if a cover is closed), etc. Switches are comprised of moving or sliding mechanical elements are designed to operate for thousan ...
1 ELECTRODE-LESS MEASUREMENT OF CELL LAYERS
1 ELECTRODE-LESS MEASUREMENT OF CELL LAYERS

... impedance was calculated by Equ. (6) from measured values of modulus and phase of output voltages Uopz(f) and Uopx(f) of CST. On Fig. 4 b) is the graph showing one example of dependence of cells impedance on frequency. The shape of graph reminds typical one displayed on Fig. 1 b) and obtained by ord ...
MAX6613MXK+T
MAX6613MXK+T

... to, the object whose temperature it is intended to measure. Because there is a good thermal path between the package’s metal lead and the IC die, the MAX6613 can accurately measure the temperature of the circuit board to which it is soldered. If the sensor is intended to measure the temperature of a ...
Understanding Electronics Components
Understanding Electronics Components

... signal to be amplified is brought between node 1 (amplifier input) and gnd, while the resulting amplified signal appears between node 2 (amplifier output) and gnd. To get the optimal performance (high amplification, low distortion, low noise, etc) , it is necessary to "set" the transistor's operatin ...
Full-Text PDF
Full-Text PDF

... shunt resistance, since it leads to power loss in a fully-irradiated solar panel. However, when there is a current mismatch between the cells, one can calculate an optimized shunt resistance that will maximize the output power. This solution is not very practical, since the optimized value for the s ...
Instruction Manual - Davis Instruments
Instruction Manual - Davis Instruments

... must be replaced before using the meter. Failure to do so could result in damage to equipment and/or electrical shock to the user. 5.3 Insulation Resistance Measurements 5.3.1 200M Ω /250V, 200M Ω /500V Tests This measurement range is most commonly used. After connecting the test leads as described ...
BDTIC www.BDTIC.com/infineon  RF & Protection Devices
BDTIC www.BDTIC.com/infineon RF & Protection Devices

Supply Regulation Techniques for Phase-Locked
Supply Regulation Techniques for Phase-Locked

A Novel Active and Reactive Power Controller for Standalone
A Novel Active and Reactive Power Controller for Standalone

AD8012
AD8012

... is determined by the glass transition temperature of the plastic, approximately +150°C. Temporarily exceeding this limit may cause a shift in parametric performance due to a change in the stresses exerted on the die by the package. Exceeding a junction temperature of +175°C for an extended period ca ...
What transients are and why you need protection
What transients are and why you need protection

Introduction to the Decibel
Introduction to the Decibel

Datasheet Template
Datasheet Template

... 1. Bias network is required; can be biased from either side (pin 7 or pin 19); see Application Circuit on page 7 as an example. 2. Bias network is required; must be biased from both side (pins 8, 9, 17, 18); see Application Circuit on page 7 as an example. ...
infrared sauna room
infrared sauna room

... H: Installation of BACK WALL Heaters, Heaters will be installed in provided screw holes in the back and sidewall panels as required. This applies to Ceramic or Carbon heaters. Chase each heater Power Cord through supplied holes in back panels starting with the top hole pushing cord into and out of t ...
< 1 ... 894 895 896 897 898 899 900 901 902 ... 1974 >

Mains electricity



Mains electricity is the general-purpose alternating-current (AC) electric power supply. In the US, electric power is referred to by several names including household power, household electricity, house current, powerline, domestic power, wall power, line power, AC power, city power, street power, and grid power.The two principal properties of the electric power supply, voltage and frequency, differ between regions. A voltage of (nominally) 230 V and a frequency of 50 Hz is used in Europe, most of Asia, most of South America and Australia. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other voltages exist, and some countries may have, for example, 230 V but 60 Hz. This is a concern to travelers, since portable appliances designed for one voltage and frequency combination may not operate or may be destroyed by another.The use of different plugs and sockets in different regions provides some protection from accidental use of appliances with incompatible voltage and frequency requirements.
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