Xem 1-20 trên 282 kết quả Voltage
  • causing a voltage sag with duration of more than 1 cycle occurs within the area of vulnerability. However, faults outside this area will not cause the voltage to drop below 0.5 pu. The same discussion applies to the area of vulnerability for ASD loads. The less sensitive the equipment, the smaller the area of vulnerability will be (and the fewer times sags will cause the equipment to misoperate). The voltage sag performance for a given customer facility will depend on whether the customer is supplied from the transmission system or from the distribution system.

    pdf473p beobobeo 01-08-2012 45 13   Download

  • Calculation of the induced voltage Ui induced voltage in a cable system depends on the mutual inductance between the core and sheath, wires and eventually current cable length: LM is mutual inductivity core and shell (H / km). Inductivity interplay between core and shell LM calculated as follows: To install the formation of trefoil

    pdf27p beobobeo 01-08-2012 57 3   Download

  • Bài giảng Chương 7: Reference Voltage & Comparator được thực hiện nhằm giúp các bạn nắm bắt được những kiến thức về module VREF; module COMPARATOR. Mời các bạn tham khảo bài giảng để nắm bắt nội dung chi tiết. Tài liệu hữu ích với các bạn chuyên ngành Công nghệ thông tin.

     

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  • Merlin Gerin technical guide Medium Voltage help you to carry out the calculations requires to define and determine equipment dimensions and provides useful information enabling you to design your MV switchboard. It's goal is presenting and assisting in the section of MV equipment in conformity with standards; proving design rules used to calculate the dimensions or ratings of an MV switchboard.

     

     

    pdf80p ducxt1995 15-05-2015 12 2   Download

  • Điện áp lệch không đầu vào: Điện áp lệch không (input offset voltage): do sự không cân bằng của các mạch điện tử trong op amp, khi điện áp đầu vào bằng không thì điện áp đầu ra khác không. Điện áp offset là điện áp cần đặt vào đầu vào để cho đầu ra bằng 0. Ký hiệu VIO.

    pdf21p se7en_1007 13-10-2010 382 114   Download

  • Electronics may be defined as the science and technology of electronic devices and systems.Electronic devices are primarily non-linear devices such as diodes and transistors and in general integrated circuits (ICs) in which small signals (voltages and currents) are applied to them. Of course, electronic systems may include resistors, capacitors and inductors as well.

    ppt58p taphikhanh 18-12-2009 175 96   Download

  • Products and systems that provide protection, control and measurement for electrical installations, enclosures, switchboards, electronics and electromechanical devices for industrial machines, plants and related service. The offering also includes intelligent building control systems, also known as KNX systems, for home and building automation to improve comfort, energy efficiency and security.

    pdf54p nmtinh 03-11-2010 356 85   Download

  • Ecodial V3.38 Low-voltage electrical installation design software Fupact and variable speed drive integrated Building a New Electric World Ecodial V3.38 complies with the latest electrical standards, bringing LV installation design software to a new level of performance. With Ecodial V3.38, design low the easy way Personalise your project New standards Ecodial V3.3 series have been approved by the UTE. It can be used to produce design files complying with: b the CENELEC R 064-003 European calculation guide b IEC 364 installation standards.

    pdf4p bimatcuocdoi0905 22-04-2010 203 69   Download

  • A neural-network-based space-vector PWM controller for a three-level voltage-fed inverter induction motor drive

    pdf10p hoang1 31-10-2009 122 49   Download

  • The discrete time control of a three phase 4 wire PWM inverter with variable DC link voltage for simultaneously supply of three phase and single phase load in transformerless stand alone photovoltaic application with battery energy storage (BES) and LC output filter is described.

    pdf9p hoang1 02-11-2009 159 37   Download

  • Inverter Technology variable power supply voltage and frequency adjustment can not be fixed, the power supply voltage and frequency are required to use energy. Advantages of this technology is microwave lighter, smaller but wider oven cavity, energy and cooking time, especially as a result of better food.

    ppt50p taphikhanh 18-12-2009 85 30   Download

  • Power electronic converters (PECs) are static devices, without any movable parts, that convert electric energy of one set of properties into electric energy of another, different set of properties. The properties that are changed by the action of the converter are one or more of the following: number of phases, frequency, and voltage rms (or average, in the DC case) value. Thus any power electronic converter is essentially a transformer in a broad sense. Action of a power electronic converter is illustrated in Fig....

    pdf56p liemthanh 15-12-2009 75 22   Download

  • With technology advancements in semiconductor devices such as insulated gate bipolar transistors (IGBTs) and gate commutated thyristors (GCTs), modern highpower medium voltage (MV) drives are increasingly used in petrochemical, mining, steel and metals, transportation and other industries to conserve electric energy, increase productivity and improve product quality. Although research and development of the medium voltage (2.3 KV to 13.8 KV) drive in the 1-MW to 100-MW range are continuously growing, books dedicated to this technology seem unavailable.

    pdf333p ctq_109 28-02-2013 63 21   Download

  • Dạo gần đây trong các bài đánh giá sản phẩm bộ nguồn, bạn thường hay nghe nhắc tới các danh từ như Voltage Regulator Module hoặc VRM hoặc “DC to DC”. Vậy tính năng này hoạt động như thế nào trong PSU?

    pdf7p halinhxinhdep 13-05-2011 64 13   Download

  • Voltage tanding Wave Ratio (vswr) / Reflection Coefficent return loss / Missmatchloss

    pdf2p hoang3 05-11-2009 109 8   Download

  • The digital multimeter is a versatile testing and troubleshooting device. This lab covers both direct current (DC) and alternating current (AC) voltage measurements. Voltage is measured in either AC or DC volts, indicated by a V. Voltage is the pressure that moves electrons through a circuit from one place to another. Voltage differential is essential to the flow of electricity. The voltage differential between a cloud in the sky and the earth is what causes lightning to strike.

    pdf3p thanhha 27-08-2009 54 7   Download

  • HEAT SHRINKABLE TERMINATION AND STRAIGHT JOINT Medium Voltage Heat Shrinkable Termination and Joint up to 24kV Đầu Cáp và Hộp Nối Cáp Co Nhiệt, Điện Áp đến 24kV

    pdf5p kemoc6 01-07-2011 28 6   Download

  • The switching regulator is increasing in popularity because it offers the advantages of higher power conversion efficiency and increased design flexibility (multiple output voltages of different polarities can be generated from a single input voltage). This paper will detail the operating principles of the four most commonly used switching converter types: Buck: used the reduce a DC voltage to a lower DC voltage. Boost: provides an output voltage that is higher than the input. Buck-Boost (invert): an output voltage is generated opposite in polarity to the input....

    pdf34p trucden 26-01-2013 36 6   Download

  • Tham khảo tài liệu 'krone - datasheet - highband - over voltage arrestor magazine', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf2p stumble 26-05-2009 140 5   Download

  • HDSL is a powerful, cost-effective, T1-based transport technology that leverages existing copper infrastructure and is, therefore, of great interest to both subscribers and service providers. It uses central office (CO) units at the carrier's office and remote units at the customer site and may, depending upon distance, require HDSL repeaters over the length of the copper span. The power needed to operate the repeaters and remote equipment is provided over the span itself, and must be handled safely for the protection of users and telephone company craftspersons....

    pdf4p minhthanh 10-08-2009 67 5   Download

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