定价： 67元

The guide is based on industry practices and presents guidelines for installation, maintenance, and operation of above ground irrigation equipment near or under power lines as they pertain to minimum distance to energized conductors and proper grounding to help minimize nuisance shocks. The guide covers a variety of conditions in general terms. Specific recommendations are made for the type of irrigation systems and power line parameters most commonly found. This guide does not cover… read more transferred potentials and currents. read less

定价： 57元 / 折扣价： 49 元

This guide addresses the composition, general technical requirements, testing method, and testing rules of UAV-based patrol inspection systems. This guide applies to the UAV systems used for patrol inspection on ac and dc overhead transmission lines.

定价： 70元 / 折扣价： 60 元

The guide specifies the direct-current (dc) ice-melting conditions, melting current, melting duration, and the amplitude of harmonics injected into the power grid to support the safety, efficiency, and effectiveness of dc ice melting. It also specifies the technical parameters, inspection, operation, and maintenance (O&M) of dc ice-melting devices. The guide is applicable to dc ice melting of 110 kV to 500 kV ac/dc overhead transmission lines.

定价： 72元 / 折扣价： 62 元

定价： 56元 / 折扣价： 48 元

This standard covers the performance, test requirements, procedures, and acceptance criteria for a transmission line overhead ground wire (a.k.a. shield wire, static wire, earth wire, skywire) with optical fibers commonly known as optical ground wire (OPGW). An OPGW cable has the dual performance functions of a ground wire with telecommunications capabilities. This standard includes functional requirements, such as electrical, mechanical, optical fiber, environmental and packaging, and test… read more requirements related to design, installation, in-service, and maintenance, including routine tests. This standard is not intended to supersede any established safety rules, codes, regulations, or practices associated with the use of OPGW cables. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use. read less

定价： 76元 / 折扣价： 65 元

This standard covers the performance, test requirements, procedures, and acceptance criteria for a transmission line phase conductor with optical fibers commonly known as optical phase conductor (OPPC). An OPPC has the dual performance functions of a current carrying phase conductor, cable, or wire, with telecommunications capabilities. (If required, OPPC could also be used as pole or return conductors for dc systems.) The OPPCs are designed to be located primarily on overhead utility… read more facilities. This standard includes functional requirements such as electrical, mechanical, optical fiber, environmental and packaging; also included are test requirements related to design, installation, in-service, maintenance, including routine tests. This standard is not intended to supersede any established safety rules, codes, regulations, or practices associated with the use of OPPC. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use. read less

定价： 59元 / 折扣价： 51 元

This guide identifies the mechanisms and analytical approach for ac interference effects on conductive linear facilities due to the operation of co-located electric transmission lines. The common mechanisms for ac interference, including magnetic inductive coupling, capacitive coupling, and conductive voltage transfer through soil are discussed. Included are general guidelines and considerations for performing detailed ac interference analyses, with sections specific to the analysis of co-… read more located pipeline and railroad facilities. This guide does not dictate specific compliance limits, direct when an ac interference analysis must be performed, or cover other issues that may need to be considered in joint-use corridors, such as effects due to lightning striking the line or dc corrosion on structures. read less

定价： 73元 / 折扣价： 63 元

This standard establishes uniform procedures for the measurement of power frequency electric and magnetic fields from alternating current (ac) overhead power lines and for the calibration of the meters used in these measurements. A uniform procedure is a prerequisite to comparisons of electric and magnetic fields of various ac overhead power lines. These procedures apply to the measurement of electric and magnetic fields close to ground level. They can also be tentatively applied to electric… read more field measurements near an energized conductor or structure with the limitations outlined in 3.5. read less

定价： 68元 / 折扣价： 58 元

This standard covers an all-dielectric fiber optic (WRAP) cable designed to be helically wrapped around a conductor or other messenger on overhead power facilities. This covers the mechanical, electrical, and optical performance; installation guidelines; acceptance criteria; test requirements; environmental considerations; packaging and shipping guidelines; and accessories.

定价： 59元 / 折扣价： 51 元

This project will provide guidance for the planning, permitting, design, equipment specification, installation, commissioning, operation, and maintenance of gas-insulated transmission lines. The guide will address technical aspects only. Commercial and legal issues associated with gas-insulated transmission lines are not considered. This guide applies to ac transmission lines rated for maximum operating voltage of 72.5 kV and higher.

定价： 65元 / 折扣价： 56 元

This guide involves on-line monitoring of the ice on overhead lines (OHL), weather forecast, terrain identification, and icing prediction. It can serve the high-precision demands of forecasting line icing in specific micro-topographic areas during the design, operation, and maintenance of OHLs. This guide can also provide references for other industries like the communications industry.

定价： 74元 / 折扣价： 63 元

定价： 67元

定价： 194元 / 折扣价： 165 元

This document provides recommendations for electromagnetic field measurement locations, procedures, and results evaluation for corridors containing both alternating current (ac) and direct current (dc) overhead transmission lines. This document primarily addresses application of parallel ac and dc lines that are in close proximity either on separate or shared structures.

定价： 68元 / 折扣价： 58 元