This guide encompasses the application of surge protective devices (SPDs) (secondary arresters) from the secondary terminals of the distribution transformer to the line side of the service equipment.

定价： 65元 / 折扣价： 56 元

This guide covers the application of surge-protective devices (SPDs) for installation on the load side of the service equipment for 50 Hz or 60 Hz, ac power circuits rated 1000 V rms or less.

定价： 158元 / 折扣价： 135 元

This standard defines PHY and MAC specifications for high data rate wireless connectivity (typically over 200 Mbps) with fixed, portable, and moving devices. Data rates are high enough to satisfy a set of consumer multimedia industry needs, as well as to support emerging wireless switched point-to-point and high rate close proximity point-to-point applications.

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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

The IEEE C62.42™ guide series covers surge-protective components (SPCs) used in power and telecom surge-protective devices (SPDs) and equipment ports. This overview covers the following: Protective functions both non-linear and linear; Component technologies and characteristics; Common circuit designs used in SPDs and equipment ports; Information on the impulse (surge) generators used to test SPCs. Additional parts of IEEE C62.42™ on specific SPC technologies provide details on the following:… read more Component construction; Characteristics and ratings; Application examples read less

定价： 82元 / 折扣价： 70 元

This guide is intended for application to three-phase electrical utility systems and is Part I of the IEEE Std C62.92 series. This part provides definitions and considerations that are general to all types of neutral grounding for electrical utility systems. Goals of system grounding, means of grounding, and classes of grounding are addressed in this part.

定价： 65元 / 折扣价： 56 元

This standard describes minimum performance requirements and test methods for evaluating the performance of alarming personal radiation detectors (PRDs) for homeland security applications. PRDs are pocket-sized battery-powered alarming electronic instruments that are worn on the body and used to detect photon-emitting, and optionally neutron-emitting, radioactive materials. PRDs have user-readable displays related to the intensity of radiation, but they are distinct from, and typically more… read more sensitive than, electronic personal dosimeters, which are designed to measure the dose equivalent to workers occupationally exposed to radiation. The performance criteria contained in this standard are meant to provide the means for verifying the capability of the PRDs to reliably detect changes above background levels of ionizing radiation fields and alert the user to these changes. This standard also specifies the requirements and test methods for environmental, electromagnetic, and mechanical conditions that may affect the ability of the PRDs to function properly. This standard does not apply to spectroscopic PRDs that have the ability to identity radionuclides. The ANSI N42.48 standard [B12] covers spectroscopic PRDs.1 This standard does not apply to instruments that are primarily intended to provide a measurement of dose-equivalent, personal dose-equivalent, or ambient dose-equivalent rate. However, if the manufacturers of PRDs that provide an indication of personal dose-equivalent rate (expressed in units of mrem/h or μSv/h) claim that the PRD may be used for personal protection, then the PRD shall comply with the applicable radiological requirements described in ANSI N42.20 [B17] (i.e., accuracy, energy, and angle response tests). read less

定价： 128元 / 折扣价： 109 元

This standard establishes the performance requirements and provides the testing and evaluation criteria for installed radiation portal monitors (RPMs) that detect photon- and neutron-emitting radioactive substances by monitoring people, packages, containers, and vehicles. Performance requirements for portal monitors with radionuclide identification capabilities are addressed by the ANSI N42.38 standard [B19]. Performance requirements for mobile and transportable systems are addressed by the… read more ANSI N42.43 standard [B20]. read less

定价： 106元 / 折扣价： 91 元

This document is the primary American National Standard on application of the metric system. It emphasizes use of the International System of Units (SI), which is the modern, internationally accepted metric system. It includes information on SI, a limited list of units recognized for use with SI, and a list of conversion factors, together with general guidance on style and usage. It also lists older "metric" units that shall no longer be used. The word primary implies that other metric… read more standards in the United States should be consistent with this document. read less

定价： 63元 / 折扣价： 54 元

This International Standard describes the basic requirements for qualifying electrical equipment important to safety and interfaces (electrical and mechanical) that are to be used in nuclear facilities. The principles, methods, and procedures described are intended to be used for qualifying equipment, maintaining and extending qualification, and updating qualification, as required, if the equipment is modified. The qualification requirements in this standard, when met, demonstrate and document the ability of equipment to perform safety function(s) under applicable service conditions, including design basis events and certain design extension conditions, and reduce the risk of environmentally induced common-cause equipment failure. This standard does not provide environmental stress levels or performance requirements. Other aspects, relating to quality assurance, selection and use of electronic devices, design and modification of digital systems are not part of this standard. Other IEC or IEEE standards that present qualification programmes for specific equipment, specific environments, or specific parts of the qualification programme may be used to supplement this standard, as applicable. The bibliography lists other standards related to equipment qualification.

定价： 82元 / 折扣价： 70 元

This standard defines an exchange format, utilizing eXtensible Markup Language (XML), for both the static description of a test station, and the specific description of test station instance information.

定价： 65元 / 折扣价： 56 元

Within the context of the ISO/IEEE 11073 family of standards for device communication, this standard establishes a normative definition of the communication between sleep apnoea breathing therapy equipment and managers (e.g., cell phones, personal computers, personal health appliances, set top boxes) in a manner that enables plug-and-play interoperability. It leverages appropriate portions of existing standards including ISO/IEEE 11073 terminology, information models, application profile… read more standards, and transport standards. It specifies the use of specific term codes, formats, and behaviors in telehealth environments restricting optionality in base frameworks in favor of interoperability. This standard defines a common core of communication functionality for sleep apnoea breathing therapy equipment. In this context, sleep apnoea breathing therapy equipment are defined as devices that are intended to alleviate the symptoms of a patient who suffers from sleep apnoea by delivering a therapeutic breathing pressure to the patient. Sleep apnoea breathing therapy equipment are primarily used in the home health-care environment by a lay operator without direct professional supervision. read less

定价： 159元 / 折扣价： 136 元

Based on the IEEE 1888(TM) protocols, this standard describes network gateway central access control and management policy through the extension of existing interface protocols, message formats, and interactive processing in ubiquitous green community control networks (UGCCNets). This standard extends the definition of the original interface protocols and message formats and mainly specifies the network gateway signal flow for access control, registration management, state querying, event… read more reporting, remote management, etc. read less

定价： 82元 / 折扣价： 70 元

This specification provides security service enhancements for the protocol defined in IEEE Std 1888(TM), IEEE Standard for Ubiquitous Green Community Control Network Protocol. This standard describes security requirements for the ubiquitous green community control network and specifies the system security architecture along with security procedures and protocols.

定价： 106元 / 折扣价： 91 元

POSIX.1-2008 defines a standard operating system interface and environment, including a command interpreter (or "shell"), and common utility programs to support applications portability at the source code level. It is intended to be used by both application developers and system implementors.

定价： 942元 / 折扣价： 801 元