This guide provides direction for the selection of monitoring and for diagnostic parameters to be used with high-voltage circuit breakers (i.e., above 1000 V ac). It provides guidance on appropriate parameters to be considered for monitoring applied to various circuit breaker technologies. This guide will lead a user through an analysis of circuit breaker performance and application expectations. The analysis includes a failure modes and effects analysis (FMEA) of the circuit breaker and associated components, an analysis of the risks associated with failure of the specific application, and a discussion of the items to be considered in a cost-benefit study to justify application of monitoring in its many forms. Monitoring is dependent on the technology of the circuit breaker and monitoring available at the time of application. FMEA, as well as failure modes, effects, and criticality analysis (FMECA), are methods of reliability analysis intended to identify failures that have significant consequences affecting the system performance in the considered application. NOTE--The examples shown are for illustrative purposes only. Numeric and financial values shown are solely for the purpose of showing that values can be assigned if so chosen. Actual circumstances will dictate values, costs, and expenses to be used in the quantifying of risk, economic evaluation and justification, and the ultimate selection of monitoring. The specific circuit breaker technology employed will also either restrict or broaden opportunities for monitoring. This guide provides advice on what parameters can be monitored to derive information about the condition of a circuit breaker. Use of techniques, such as those in CEA Project No. 485T1049 (1997), provides more information on combining appropriate signals to derive greater information than either signal alone would provide. Circuits associated with the operation of the circuit breaker, which might include auxiliary contacts, X and Y relays, lockout switches, and so on, are included in this guide. External control circuits are not included in the scope of this guide. This guide is not intended to provide guidance on the monitoring of protection and control circuits, although they can have a significant effect on the overall circuit breaker functions.

定价： 83元 / 折扣价： 71 元

This standard applies to alternating current (ac) switchgear, designed for both indoor and outdoor installation and for operation at service frequencies up to and including 60 Hz on systems having voltages above 1000 V. This standard is applied in relevant equipment standards by a normative reference to this standard, IEEE Std C37.100.1, on a section or clause-by-clause basis. Annex A of this standard provides recommendations for its application. The inclusion of this standard as a normative reference shall not imply that all of the requirements contained herein apply as a default. In the absence of a normative reference, this standard shall be considered informative only. In case of a conflict in requirements, the requirements of the relevant equipment standard shall prevail.

定价： 106元 / 折扣价： 91 元

This standard provides common requirements for testing of ac capacitive current switching devices over 1000 V.

定价： 66元 / 折扣价： 57 元

This recommended practice is intended to identify, organize and summarize information about high-voltage circuit breakers provided by the manufacturer that knowledgeable users will find useful for the receipt, installation, commissioning, operation and maintenance, and decommissioning of ac high-voltage circuit breakers above 1000 V. This recommended practice recommends categories and an arrangement for the presentation of information in circuit breaker instruction manuals.

定价： 58元 / 折扣价： 50 元

This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of single-phase, 60 Hz, liquid-immersed, self-cooled, submersible distribution transformers with separable insulated high-voltage connectors. These transformers are rated 250 kVA and smaller, with high voltages of 34 500 GrdY/19 920 V and below and with low voltages of 600 V and below. These transformers are generally used for step-down purposes from an… read more underground primary cable supply. These transformers are typically installed in an enclosure below ground level, operated from above and suitable for continuous submerged operation. read less

定价： 58元 / 折扣价： 50 元

This standard is intended to define the requirements for CTs with a maximum of secondary output of 250 mA. These requirements of ratios, accuracy classes, burdens, and test methods supplement but are not subordinate to IEEE C57.13. These transformers are for both indoor and outdoor applications.

定价： 58元 / 折扣价： 50 元

This standard describes design and performance requirements along with testing methods for evaluating radiation detection instruments that are pocket-sized and worn on the body for detection and identification of radioactive materials commonly known as spectroscopic personal radiation detectors (SPRDs). The performance requirements contained in this standard are meant to provide a means for verifying the capability of these instruments to detect changes above background levels of radiation,… read more notify the user to these changes, and provide a means to determine if the alarm was caused by a radionuclide of interest that may require further evaluation. These devices are not intended to provide a measurement of dose-equivalent rate. However, their indication can provide an approximate value of exposure rate. They may also be used during initial response to a radiological or nuclear incident as part of a consequence management effort to locate radiation sources and possibly to detect high levels of contamination from gamma-emitting materials. No requirements for consequence management use are defined in this standard. Successful completion of the tests described in this standard should not be construed as an ability to identify all radionuclides in all environments. read less

定价： 83元 / 折扣价： 71 元

This standard encompasses monitoring all types of airborne radioactivity including aerosols, noble gases, iodines, and tritium in the workplace, in effluent, and in the environment. This standard includes initial design, manufacture, minimum performance, performance testing, calibration, and maintenance requirements. This standard covers both real-time monitors and air samplers.

定价： 104元 / 折扣价： 89 元

This part of IEC 60076 applies to dry-type and liquid-immersed transformers for wind turbine step-up applications having a winding with highest voltage for equipment up to and including 72,5 kV. This document applies to the transformer used to connect the wind turbine generator to the wind farm power collection system or adjacent distribution network and not the transformer used to connect several wind turbines to a distribution or transmission network. Transformers covered by this document… read more comply with the relevant requirements prescribed in the IEC 60076 standards or IEEE C57 standards. read less

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定价： 83元 / 折扣价： 71 元

This document supports the interest of information developers and associated roles responsible for producing information for users of software and systems developed within an agile environment. This document takes a process standard approach to specify the way in which information for users can be developed in agile development projects. This document provides requirements of information management and information development processes appropriate for software projects that are using agile development methods. Clause 5 covers the overall requirements for information in agile software development. Clause 6 covers requirements for the information development lead or project manager to plan an agile information development project and manage the information development activities in an agile environment. Clause 7 covers requirements for designing, developing, and providing information for users in an agile environment. Annex A describes agile development practices and methods.

定价： 66元 / 折扣价： 57 元

This document: specifies the required processes implemented in the engineering activities that result in requirements for systems and software products (including services) throughout the life cycle; provides guidelines for applying the requirements and requirements-related processes described in ISO/IEC/IEEE 15288 and ISO/IEC/IEEE 12207; specifies the required information items produced through the implementation of the requirements processes; specifies the required contents of the required information items; provides guidelines for the format of the required and related information items. This document is applicable to: those who use or plan to use ISO/IEC/IEEE 15288 and ISO/IEC/IEEE 12207 on projects dealing with man-made systems, software-intensive systems, software and hardware products, and services related to those systems and products, regardless of the project scope, product(s), methodology,size or complexity; anyone performing requirements engineering activities to aid in ensuring that their application of the requirements engineering processes conforms to ISO/IEC/IEEE 15288 and/or ISO/IEC/IEEE 12207; those who use or plan to use ISO/IEC/IEEE 15289 on projects dealing with man-made systems, software-intensive systems, software and hardware products and services related to those systems and products, regardless of the project scope, product(s), methodology, size or complexity; anyone performing requirements engineering activities to aid in ensuring that the information items developed during the application of requirements engineering processes conforms to ISO/IEC/IEEE 15289.

定价： 159元 / 折扣价： 136 元

This document provides guidelines for the life cycle management of systems and software, complementing the processes described in ISO/IEC/IEEE 15288 and ISO/IEC/IEEE 12207. This document: - addresses systems concepts and life cycle concepts, models, stages, processes, process application, key points of view, adaptation and use in various domains and by various disciplines; - establishes a common framework for describing life cycles, including their individual stages, for the management of… read more projects to provide, or acquire either products or services; - defines the concept and terminology of a life cycle; - supports the use of the life cycle processes within an organization or a project. Organizations and projects can use these life cycle concepts when acquiring and supplying either products or services; - provides guidance on adapting a life cycle model and the content associated with a life cycle or a part of a life cycle; - describes the relationship between life cycles and their use in applying the processes in ISO/IEC/IEEE 15288 (systems aspects) and ISO/IEC/IEEE 12207 (software aspects); - shows the relationships of life cycle concepts to the hardware, human, services, process, procedure, facility and naturally occurring entity aspects of projects; and - describes how its concepts relate to detailed process standards, for example, in the areas of measurement, project management and risk management. read less

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This document supports the needs of users for consistent, complete, accurate, and usable information. It provides requirements for strategy, planning, managing, staffing, translation, production, and quality and process-maturity assessment for managers of information for users. It specifies processes and procedures for managing information for users throughout the product- or systems-development life cycle. It also includes requirements for key documents produced for managing information for… read more users, including strategic and project plans. read less

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定价： 66元 / 折扣价： 57 元