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Commercial PV Using the C250 Microinverter
Commercial PV Using the C250 Microinverter

... the power distribution is 480Y/277 V. The C250 Microinverter is 96.5% efficient and works with most 60and 72-cell modules up to 350 watts at STC. The C250 is rated for a continuous output of 240 watts. Use the C250 at sites with three-phase service and a nominal operating voltage range of 220 VAC to ...
Illumination Selection for Indicator Lights
Illumination Selection for Indicator Lights

... measured as luminous intensity, and most often stated in terms of millicandelas (mcd). But output ratings alone aren’t enough on which to base a selection. Another variable to consider is viewing angle. A device with a relatively low mcd rating but a wide viewing angle, for example, may be more usef ...
SN65LVDT14-EP 数据资料 dataSheet 下载
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... A, B, Y, Z, and GND ...
PHYS 1442-004, Dr. Andrew Brandt
PHYS 1442-004, Dr. Andrew Brandt

... – Examples, the complete power chain from generator to your house, high voltage electronics – A transformer consists of two coils of wires known as the primary and secondary – The two coils can be interwoven or linked by a laminated soft iron core to reduce eddy current losses ...
MAX5927/MAX5929 Low-Voltage, Quad, Hot-Swap Controllers/Power Sequencers General Description
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... one supply is at or above +2.7V and only one supply is above +11.0V. The input voltage rails (channels) can be configured to sequentially turn-on/off, track each other, or have completely independent operation. The discharged filter capacitors of the circuit card provide low impedance to the live ba ...
chapter 3 - Portal UniMAP
chapter 3 - Portal UniMAP

...  Each phase winding consists of Nf-turns of conductor, which is made up of coils and groups.  There is a group of coils for each pole in the machine. Within each group, coils are distributed over several slots in the stator. An example is shown in Figure 3.4.  A voltage is induced in each coil wi ...
AR4301228233
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... ofVgnd larger the short circuit current in the circuit. Because it has to discharge morecharge to the ground during mode transition. On operating the circuit at V g= 0 .17i.e. at optimum point, the Vgnd is less as compared to base case Vg= OV. So, areduction in short circuit current is also obtained ...
Understanding Operational Amplifier
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... relevant information to verify, before placing orders, that the information being relied on is current. TI warrants performance of its semiconductor products and related software to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality ...
Collins KWM-380 owner`s manual 2nd edition 1 January 1981
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... The importance of a good ground system cannot be overemphasized. All units of the system should have ground interconnections through heavy wire (#12 AWG or larger) or ground strap (6-mm (1/4-in) wide or larger) between ground lugs. Use as short a length of ground wire or braid as practical between u ...
Hanyang University
Hanyang University

a CMOS 80 MHz Monolithic 256 24(18) Color Palette RAM
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... Composite sync control input (TTL compatible). A logical zero on this input switches off a 40 IRE current source on the analog outputs (see Figures 3 and 4). SYNC does not override any other control or data input, as shown in Tables IV and V; therefore, it should be asserted only during the blanking ...
2.5.2 Class 1E Uninterruptible Power Supply Design Description 1.0
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... Each EUPS battery is able to provide power for starting and operating design loads for a minimum of two hours when the ac supply to the battery charger is lost. ...
The following article was offered on the
The following article was offered on the

... 14v bus could rise to as much as 40 volts but for no more than 100 milliseconds before the OV system brings the failure to heel. Both of these failures are a problem. The second failure, however, could do potential damage to the radios and other appliances in the electrical system. This is the purpo ...
Multimode High-Frequency PWM Controller
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... PFM mode, a shutdown current of less than 1 µA, a sleep-mode current of less than 100 µA and a full operating current of less than 2 mA at 1 MHz, it is ideal for building highly efficient, dc-to-dc converters. The TPS43000 operates over a wide input voltage range of 1.8 V to 9.0 V. Typical power sou ...
earth leakage relays
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... The “log” of a number is short for “logarithm” and is the answer to the question, “To what value does the logarithm’s base value need to be raised in order to equal the number in question?” When calculating decibels, we use the common logarithm which uses a base value of 10. (The natural logarithm, ...
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... The nature of the defect is that over a period of many years, cracks can form in the solder joint connections between the LI magamp and the circuit board.. Figure 2 shows a cracked solder joint connection, as seen from the back of the SBSR AVR card. There are nine such solder connections at the L I ...
RPT-34PB3F
RPT-34PB3F

... "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. ...
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... Control Panel: Enclosure for electrochromic glass controls which mounts to an indoor surface or may be recessed in a wall for flush mounting; includes flush mount cover. ...
Analog Devices Welcomes Hittite Microwave Corporation www.analog.com www.hittite.com
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... TLV431. R3 determines the current that flows through the load (IL) and the TLV431 (IK). The TLV431 will adjust how much current it sinks or “shunts” to maintain a voltage equal to VREF across its feedback pin. Since load current and supply voltage may vary, R3 should be small enough to supply at lea ...
attention all bidders
attention all bidders

... Steady-state ac input voltage deviates up to plus or minus 10 percent from nominal voltage. Steady-state input frequency deviates up to plus or minus 5 percent from nominal frequency. THD of input voltage is 15 percent or more with a minimum crest factor of 3.0, and the largest single harmonic compo ...
NA555, NE555, SA555, SE555 Precision Timers
NA555, NE555, SA555, SE555 Precision Timers

... sequence ends only if TRIG is high for at least 10 µs before the end of the timing interval. When the trigger is grounded, the comparator storage time can be as long as 10 µs, which limits the minimum monostable pulse width to 10 µs. Because of the threshold level and saturation voltage of Q1, the o ...
Comparative Analysis of Cascaded H
Comparative Analysis of Cascaded H

... requires associated gate drive circuits and adds further complexity to the converter. Another disadvantage of multilevel power converters is that the small voltage steps are typically produced by isolated voltage sources or a bank of series capacitors. Isolated voltage sources may not always be read ...
Schaffner NSG2025 Fast Transient / Burst Generator NSG 2025
Schaffner NSG2025 Fast Transient / Burst Generator NSG 2025

... The Schaffner NSG 2025 EFT Burst Simulator is a high end burst generator and the choice for users who need the maximum in pulse amplitude/frequency capabilities, flexibility, coupling network features and EUT connectivity. Based on a "building block" concept, the Schaffner NSG 2025 lets you select a ...
< 1 ... 660 661 662 663 664 665 666 667 668 ... 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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