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定价： 110元 / 折扣价： 94 元

The scope of this guide is the definition of load models for various conventional and emerging elements in the generation, transmission, distribution, and customer sectors at all voltage levels. This includes guidance for developing load models, identifying load model parameters, and utilizing measurement data for load model development at various voltage levels. It also includes modeling practices for emerging elements such as power electronic connected elements, electrical vehicles and… read more charging stations, better utilization of information and communication technology (ICT ) infrastructures in load model development, and dynamics associated with customer involvement. read less

定价： 101元 / 折扣价： 86 元

This standard applies to enclosed assemblies of single-phase and three-phase, dead-front and live-front, subsurface, vault, and padmounted, load-interrupter switches with or without protective devices such as fuses or fault interrupters, up to 38 kV rated maximum voltage.

定价： 109元 / 折扣价： 93 元

This standard applies to enclosed assemblies of single-phase and three-phase, dead-front and live-front, subsurface, vault, and padmounted, load-interrupter switches with or without protective devices such as fuses or fault interrupters, up to 38 kV rated maximum voltage.

定价： 82元 / 折扣价： 70 元

This recommended practice provides guidance and references for the design, manufacture, testing and selection of oil-immersed on-load capacity switching distribution transformers with rated frequency of 50 Hz/60 Hz, voltages of 10 kV or below, and rated capacity of 750 kVA and below. On-load capacity switching distribution transformers are transformers with two rated capacities and equipped with additional components to control the operating capacity for energy saving purposes.

定价： 72元 / 折扣价： 62 元

This guide discusses and recommends methods of testing and evaluating dissolved gases in mineral based transformer oils found in load tap changers (LTCs). General types of LTC mechanisms, breathing configurations, and electrical design will be included for evaluation criteria in determining when mechanical damage or failure has occurred. Dissolved gas analysis (DGA) of the oil in the LTC is required. This guide is not manufacturer specific, rather category specific.

定价： 65元 / 折扣价： 56 元

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This document serves as a guide for the application of protective relays used for load shedding and restoration during electric power system abnormal frequency conditions. It presents background information, a bibliography, and recommendations. It discusses abnormal frequency power system behavior, existing load shedding and restoration practices, the abnormal frequency function of typical protective relays, and possible new methods for improved load shedding and restoration. This guide is… read more limited to electric power system applications and does not include abnormal frequency protection for power generating plants. read less

定价： 110元 / 折扣价： 94 元

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The ASME B30 Standard contains provisions that apply to the construction, installation, operation, inspection, testing, maintenance, and use of cranes and other lifting and material-movement-related equipment.

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