This guide will provide testing methods for impedance measurement of alternating current (AC) transmission line and calculating methods for the RLC (Resistance, Inductance, and Capacitance) distribution parameters of the tested line. It will also provide testing and calculating methods to obtain mutual inductance and coupling capacitance between double circuit lines on same tower. This guide will outline the measuring instruments and the safety of the measurement. In addition, it will include… read more test procedures to obtain the open circuit impedances of the tested line as well as the formulas to get the distributed parameters from impedance measurements. read less

定价： 106元 / 折扣价： 91 元

This application guide for the relay protection of synchronous generators presents a review of the generally accepted forms of protection for the synchronous generator and its excitation system. It summarizes the use of relays and devices and serves as a guide for the selection of equipment to obtain adequate protection. The guide is primarily concerned with protection against faults and abnormal operating conditions for large hydraulic, steam, and combustion turbine generators. Basing… read more generator protection on machine size is difficult because the desired protection may be determined more by the importance of the generator to the power system than by the size of the generator. The recommendations made pertain to typical synchronous generator installations. However, sufficient background information relating to protection requirements, applications, and setting philosophy is given to enable the reader to evaluate the need, to select, and to apply suitable protection for most situations. The protective functions discussed in this guide may be implemented with a multifunction microprocessor based protection system (digital system). The protection philosophy, practices, and limits are essentially identical to those of the implementation using discrete component relays. The algorithms used to perform some of the protection functions may be different, but should produce equal or better protection. However, the performance and capability may be superior using the digital systems such as improved frequency response (bandwidth) and thresholds (pickup settings). Other additional features may be available from these digital systems that enhance the functionality. This guide does not purport to detail the protective requirements of all generators in every situation. For example, standby and emergency-use generators are specifically excluded. read less

定价： 173元 / 折扣价： 148 元

This guide discusses both on-line and off-line partial discharge (PD) measurements on complete windings of any type, as well as measurements on individual form-wound coils and bars. Measurements selected from those that are outlined may be appropriate for application during the manufacture, installation, operation, and maintenance of windings of ac electric machinery.

定价： 141元 / 折扣价： 120 元

定价： 50元 / 折扣价： 43 元

This guide documents present practices regarding the application of automatic reclosing control to line circuit breakers or other line interrupting devices. Both transmission and distribution line practices are addressed.

定价： 97元 / 折扣价： 83 元

Design, installation, and testing recommendations for generator control panels and switchboards on ship are established by this document. These recommendations reflect the present-day technologies, engineering methods, and engineering practices. This document is intended to be used in conjunction with IEEE Std 45-2002, IEEE Recommended Practice for Electric Installations on Shipboard.

定价： 84元 / 折扣价： 72 元

This standard applies to enclosed low-voltage ac power circuit breakers as described in American National Standard for Low-Voltage AC Power Circuit Breakers Used in Enclosures, C37.13-1973 (IEEE Std 20-1973), except that the circuit breakers discussed in this standard incorporate current-limiting fuses as an integral part of the circuit breaker. The entire device thereby becomes capable of interrupting short circuit currents up to 200 000 A rms and may be applied on circuits where the available… read more short-circuit current does not exceed that amount. read less

定价： 56元 / 折扣价： 48 元

This guide covers basic principles, methods, and experience for designing 110 kV to 1000 kV alternating current (ac) overhead transmission lines. The guide may also be used as a reference for the design of lower-voltage overhead transmission lines. This guide includes an introduction, definitions, meteorological design and criteria, electrical design, structural design criteria, design of foundations, experiment results, and design experience. This guide is a listing of the information and… read more procedures that are required during the design of overhead ac transmission line. It provides guidance for transmission line designers in the data collection design stage. read less

定价： 97元 / 折扣价： 83 元

This guide outlines the techniques and application considerations for determining the location of a fault on ac transmission and distribution lines. This document reviews traditional approaches and the primary measurement techniques used in modern devices: one- and two-terminal impedance-based methods, synchronized sampling methods and traveling-wave methods. Application considerations include: two-and three-terminal lines, series-compensated lines, parallel lines, untransposed lines, tapped… read more lines, underground cables, fault resistance effects, and other power system conditions, including those unique to distribution systems. read less

定价： 136元 / 折扣价： 116 元

This guide outlines the techniques and application considerations for determining the location of a fault on ac transmission and distribution lines. Application considerations include but are not limited to: Multi-terminal lines, series-compensated lines, parallel lines, untransposed lines, tapped lines, underground cables, fault resistance effects, and other power system conditions, including those unique to distribution systems.

定价： 93元 / 折扣价： 80 元

This standard applies to single- or multi-pole ac switches for rated maximum voltage above 1 kV to 38 kV for use in switching shunt capacitor banks (see the note in this clause). This standard covers the application of capacitive load switching wherein the capacitive loads are separated by sufficient inductance to limit the transient peak inrush current to the peak values shown in Table 2 and Table 3. Switches designed and built in accordance with this standard are rated for routine switching… read more of capacitive load currents only. NOTE--This standard is intended to be a comprehensive standard for all "specific duty" applications of switches in the area of switching shunt capacitor banks, but it is limited in scope up to and including 38 kV. However, subject to agreement between the user and manufacturer, it may be used as a specification guide for other rated voltages. read less

定价： 64元 / 折扣价： 55 元

This standard applies to gapped silicon-carbide surge-protective devices designed for repeated limiting of voltage surges on 50 Hz or 60 Hz power circuits by passing surge discharge current and subsequently automatically interrupting the flow of follow current. This standard applies to devices for separate mounting and to those supplied integrally with other equipment.

定价： 135元 / 折扣价： 115 元

This document covers general recommendations for the repair of alternating current (ac) electric motors and includes guidelines for both the user and the repair facility. It is not intended to replace specific instructions contained in the manufacturer's instruction book or in any contractual agreement between a manufacturer and a purchaser of a given machine. For the purpose of this document, the term motor is used in lieu of, and shall equate to, the terms wound rotor, generator, and machine. This standard covers reconditioning, repair, and rewind of horizontal and vertical induction motors and of synchronous motors. It applies to all voltages 15 kV and less, and all ratings above 0.75 kW (1 hp). This standard applies only to the repair of motors, and in cases involving modifications to the basic design, care must be taken so as not to negatively affect the safety and reliability of the motor. Excluded from the scope of this standard are the following: Specific requirements, certification, and inspection required for explosion proof, dust-ignition proof, flameproof, and like motors having a listing issued by a Nationally Recognized Testing; Laboratory (NRTL), for example, American Bureau of Shipping (ABS), Underwriters Laboratories, Inc. (UL), Factory Mutual (FM), and Canadian Standards Association (CSA). For motors in this category, the user shall verify if the repair facility shall be certified by such an agency; Any specific or additional requirements for hermetic motors, hydrogen-cooled generators, submersible motors, or Class 1E nuclear service motors; Direct current (dc) motors.

定价： 104元 / 折扣价： 89 元

This standard is intended for use as a basis for performance and interchangeability of equipment covered, and to assist in the proper selection of such equipment. This standard covers certain electrical, dimensional, and mechanical characteristics of optical current and voltage sensing systems used in the measurement of electricity and the control of equipment associated with the generation, transmission and distribution of alternating current.

定价： 89元 / 折扣价： 76 元

This guide identifies basic principles for voltage regulation and reactive power compensation. This guide also provides acceptable voltage deviation limits range, as well as technical measures for voltage and reactive power adjustment and allocation in power systems at 1000 kV ac and above.

定价： 81元 / 折扣价： 69 元