This guide provides general and specific recommendations on application of step-up and step-down liquid-immersed and dry-type transformers in distributed photovoltaic (DPV) power generation systems for commercial, industrial, and utility systems. The guide focuses mainly on the inverter transformers of the DPV power generation systems that are connected to the inverters supplying ac voltage and current to the primary (LV) winding of the transformer. Some specifics attributed to the auxiliary… read more power transformers in these systems are also discussed. Transformers covered in this guide comply with the relevant requirements defined in the IEEE Std C57.12.00 for liquid-immersed and IEEE Std C57.12.01 for dry-type transformers. read less

定价： 65元 / 折扣价： 56 元

This standard covers test methods and performance values for metal-oxide varistor (MOV) surge protective components (SPCs) with the following main parameter ranges: Packaging: Leaded disc-type or surface mount; Nominal varistor voltage: 5 V to 1200 V; 8/20 surge current rating: 10 A to 70 kA; 8/20 clamping voltage: 10 V to 3 kV. With appropriate component selection, these components could be used for the overvoltage protection of power and signal systems having the following: Continuous ac… read more voltages: 2.5 V rms to 750 V rms; Steady-state dc voltages: 3.3 V to 1000 V; Peak signal feed voltages: 3.5 V to 850 V. Information is given on manufacturer type testing used to determine environmental performance and rated values. read less

定价： 66元 / 折扣价： 57 元

This standard applies to surge protectors for application on multiconductor balanced or unbalanced information and communications technology (ICT) circuits and smart grid data circuits. These surge protectors are designed to limit voltage surges, current surges, or both. The surge protectors covered are generally multiple-component series or parallel combinations of linear or nonlinear elements, packaged or organized for the purpose of limiting voltage, current, or both. This standard describes the methods of testing and criteria (where appropriate) for the characteristics and ratings of surge protectors used in ICT circuits and smart grid data circuits. This standard is not intended to cover packaged single gas tube, air gap, varistor, avalanche junction, or self-restoring current limiter surgeprotective components (SPCs), which are covered by IEEE Std C62.31 [B20], IEEE Std C62.32 [B21], IEEE Std C62.33 [B22], IEEE Std C62.35 [B23], and IEEE Std C62.39 [B24], respectively. Specifically excluded from this standard are test methods for low-voltage power circuit applications. For protection of wire-line communication facilities under the specialized conditions found at power stations, consult IEEE Std 487 [B16] series of documents.

定价： 158元 / 折扣价： 135 元

This standard sets terms, test methods, test circuits, measurement procedures, and preferred result values for the surge parameters of isolating transformers used in networking devices and equipment. Three types of isolating transformer are considered: mains low frequency power, high frequency power (switching mode power supplies) and signal (e.g., Ethernet data). The surge parameters of the isolating transformer insulation barrier covered by this standard are as follows: - Rated impulse… read more voltage - Input winding to output winding capacitance - Insulation resistance Additional parameters for signal isolating transformers are as follows: - Core saturation voltage-time product - Rated input winding rms current for a given temperature rise This standard does not cover the transformer parameters required to help ensure appropriate operation on the service (e.g., signal transformer return loss). read less

定价： 65元 / 折扣价： 56 元

This guide provides electrostatic discharge (ESD) test considerations that a manufacturer should use in assessing the expected ESD effects on products in a wide range of environments and customer use. The focus is well beyond that used to simply show that a product complies with a local, regional, or international standard or regulation. The following are included: charged peripheral testing, connector pin testing, and details on the use of ESD simulators. Finally, suggestions for assuring the… read more safety of those who apply the ESD discharge are provided. The annexes include information on test method selection and more background on air and contact discharge for those who want to further understand the differences in these methods. This guide is not applicable to manufacturing, service, or maintenance of equipment. Personnel who perform these activities should be trained to avoid ESD effects or damage to the equipment. In summary, this guide has test techniques beyond those that are commonly used (e.g., IEC 61000-4-2), and hence it can be a significant tool for increasing the immunity of products to ESD events. read less

定价： 65元 / 折扣价： 56 元

The scope of this standard is a communication protocol specification for a distributed system of point-of-care (PoC) medical devices and medical IT systems that need to exchange data or safely control networked PoC medical devices by defining a profile for Web Service specifications and defining additional Web Service specifications as part of this standard.

定价： 65元 / 折扣价： 56 元

The scope of this standard is the specification of medium access control (MAC) sublayer functions and services that support multi-channel wireless connectivity between IEEE 802.11 Wireless Access in Vehicular Environments (WAVE) devices.

定价： 104元 / 折扣价： 89 元

This standard covers design, manufacturing, and testing unique to the application of power rectifier transformers intended to operate in dc supplied transportation substation applications up to 1500 V dc nominal output.

定价： 65元 / 折扣价： 56 元

This recommended practice provides recommendations for determining the electrical performance and expected uncertainty of measurement of rectangular waveguide for 110 GHz and above.

定价： 56元 / 折扣价： 48 元

The scope of this document is to provide recommendations for selection, application, and installation of electrical power, signal, control, data, and specialty marine cable systems on shipboard. These recommendations include the present day technologies, engineering methods, and engineering practices.

定价： 82元 / 折扣价： 70 元

The scope of this standard is to define a protocol and management elements, suitable for advertising information to stations attached to the same IEEE 802 LAN, for the purpose of populating physical topology and device discovery management information databases. The protocol facilitates the identification of stations connected by IEEE 802 LANs/MANs, their points of interconnection, and access points for management protocols. This standard defines a protocol that a) Advertises connectivity and… read more management information about the local station to adjacent stations on the same IEEE 802 LAN. b) Receives network management information from adjacent stations on the same IEEE 802 LAN. c) Operates with all IEEE 802 access protocols and network media. d) Establishes a network management information schema and object definitions that are suitable for storing connection information about adjacent stations. e) Provides compatibility with the IETF PTOPO MIB (IETF RFC 2922 [B9]). read less

定价： 198元 / 折扣价： 169 元

The scope of this standard is to define the Media Access Control (MAC) Service provided by all IEEE 802(R) MACs, and the Internal Sublayer Service (ISS) provided within MAC Bridges, in abstract terms of the following: a) Their semantics, primitive actions, and events; and b) The parameters of, interrelationship between, and valid sequences of these actions and events.

定价： 106元 / 折扣价： 91 元

This standard establishes specifications for high-voltage (above 1000 V) fuses and accessories for use on ac electrical distribution systems. Devices with rated maximum voltages to 170 kV are covered. The devices to which this standard applies are as follows: a) Expulsion fuses (including fuse cutouts) b) Current-limiting fuses c) Items a) and b) used in fuse enclosure packages d) Fuse supports of the type intended for use with fuses and fuse disconnecting switches e) Disconnecting devices (… read more fuse disconnecting switches, disconnecting switches, and disconnecting cutouts) created by the use of a removable fuse unit or switch blade in a fuse support f) Expulsion, current-limiting, and combination types of external capacitor fuses used with a capacitor unit, a group of units, or capacitor banks. g) Backup current-limiting fuses ("motor-starter fuses") used in conjunction with high-voltage motor starters h) Fuse links when used exclusively with expulsion fuses and fuse disconnecting switches i) Items a) through f) having integral load-break means j) Accessories including mounting brackets and switch stick (switch hooks) This standard may also be used for other devices that are similar to the devices listed in the scope. read less

定价： 82元 / 折扣价： 70 元

This recommended practice covers routine impulse tests performed on distribution transformers, as required in IEEE Std C57.12.00(TM), and described in 10.4 of IEEE Std C57.12.90(TM)-20151. Distribution transformers covered by this recommended practice are liquid-immersed, single- and three-phase overhead-type up to 500 kVA; single-phase pad-mounted compartmental-type and underground-type up to 167 kVA; three-phase pad-mounted compartmental-type; and underground-type up to 2500 kVA. This… read more recommended practice covers only those aspects of impulse testing that are specific to routine testing of distribution transformers. For more thorough coverage of impulse testing of transformers in general, IEEE Std C57.98(TM) should be consulted. read less

定价： 82元 / 折扣价： 70 元

This guide describes measures that may be taken to help mitigate tank rupture of energized liquid-immersed power transformers and reactors due to internal electrical faults. This guide does not cover the release of insulating fluid or insulating fluid mist due to failure of the following components: load tap changer compartments, bushings and their turrets, conservator tank, piping, valves, pumps, and radiators.

定价： 56元 / 折扣价： 48 元