The requirements in this standard apply to all 50 Hz and 60 Hz, two-pole and four-pole, cylindrical-rotor synchronous generators driven by steam turbines and/or by combustion gas turbines. The drive may be direct or through a gearbox or other device that permits different speeds for the turbine and the generator. The generators covered by this standard are to have rated outputs of 10 MVA and above. Cylindrical-rotor, two-pole and four-pole generators below this rating are generally covered by NEMA MG 1.

定价： 110元 / 折扣价： 94 元

The general parameters for this guide apply to 50 Hz or 60 Hz synchronous generators driven by reciprocating engines, steam turbines, combustion turbines, and hydro turbines. The guide generally applies to the stator and rotor of generators with rated outputs of 1 MVA and above. The guide does not address machine auxiliaries or the excitation system.

定价： 159元 / 折扣价： 136 元

This standard prescribes insulation levels and dielectric test requirements for power transformers where: (1) The transformer insulation levels and dielectric test requirements are specified to be in accordance with this standard.1 (2) The highest voltage winding of the transformer is wye connected and rated 345 kV or above. (3) The transformer is intended for operation on an effectively grounded system2 and is protected by suitable surge arresters.

定价： 56元 / 折扣价： 48 元

This guide is for the development of specifications for the technical requirements for the design, fabrication, testing, installation and in-service performance of high-voltage gas insulated substations (GIS) for alternating current applications rated above 52kV.

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This standard applies to ac high-voltage circuit breakers with rated nominal voltage above 1000 V. It establishes a rating structure, preferred ratings, construction and functional component requirements. This standard encompasses the following: - Three pole circuit breakers used in three-phase systems - Single pole circuit breakers used in single-phase systems - Attachments for these circuit breakers, such as bushings, current transformers, interlocks, shunt trips, etc., and auxiliary equipment sold with the circuit breakers such as closing relays and structural steel supports. This standard does not cover circuit breakers used at frequencies other than 50 Hz or 60 Hz or generator circuit breakers that are covered in IEC/IEEE Std 62271-37-013

定价： 160元 / 折扣价： 136 元

This standard applies to ac high-voltage circuit breakers with rated maximum voltage above 1000 V. It defines various tests that are made on ac high-voltage circuit breakers, except for generator circuit breakers, which are covered in IEC/IEEE 62271-37-013:2015 (formerly IEEE Std C37.013(TM)-1997). It specifies the tests and describes the accepted methods used to verify assigned ratings defined in IEEE Std C37.04(TM). It also describes the test procedures associated with production and field installation. The test procedures are divided into the following classifications: a) Design tests; b) Production tests; c) Conformance tests; d) Field tests. NOTE--Design tests are referred to as “Type” tests, and Production tests are referred to as “Routine” tests in IEC standards.

定价： 152元 / 折扣价： 130 元

This standard provides preferred voltage ratings above 230 kV nominal for alternating-current (ac) systems and equipment.

定价： 116元 / 折扣价： 99 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

1.1 Scope This standard covers ac switches rated above 1 kV up to and including 52 kV for use in metal-enclosed switchgear. These switches may be: a) Stationary or drawout b) Manual or power operated c) Fused or unfused Within this standard, the words "switch(es)" shall be considered to mean three-phase, ac, gang-operated, switch(es) as defined by this scope. These switches are intended to be installed in an enclosure that provides a degree of protection to the switch and the enclosure may be… read more suitable for indoor or outdoor conditions and complies with the requirements of switchgear assemblies as defined by IEEE Std C37.20.2, IEEE Std C37.20.3, or IEEE Std C37.20.9. This standard does not apply to switches for use in subsurface or pad-mounted switchgear in IEEE Std C37.74 or to high-voltage air switches in IEEE Std C37.30.1. read less

定价： 67元 / 折扣价： 57 元

This standard gives specifications for the waveguide (including aperture dimensions, frequency range, cut-off frequency, etc.). This standard considers the tolerances of the waveguide aperture dimensions and the effect these have on the electrical properties (in terms of return loss, transmission loss, etc.) of the waveguide.

定价： 55元 / 折扣价： 47 元

This guide presents the practices and procedures for testing and diagnosis of shielded power cable systems rated 5 kV and above using DAC voltages. It applies to all types of power cable systems that are intended for the transmission or distribution of electric power. The tabulated test levels assume that the cable systems have an effectively grounded neutral system or a grounded metallic shield.

定价： 82元 / 折扣价： 70 元

This standard covers metal-enclosed interrupter (MEI) switchgear assemblies where air at ambient pressure is the primary insulating medium. Individual components within the switchgear may use other insulating means. The switchgear includes components such as interrupter switches; selector switches; power fuses; circuit breakers; control, instrumentation and metering devices; and protective equipment. MEI switchgear includes, but is not specifically limited to, equipment for the control and… read more protection of apparatus used for distribution of electrical power. This standard is concerned with enclosed (rather than open), indoor and outdoor switchgear assemblies rated above 1 kV ac up to and including 48.3 kV ac. It includes equipment that is part of primary and secondary unit substations. It does not include gas-insulated substation equipment or switching devices mounted integrally within a transformer enclosure. read less

定价： 104元 / 折扣价： 89 元

定价： 149元 / 折扣价： 127 元

This guide presents the recommended practices and procedures for direct voltage acceptance and maintenance testing of shielded dc insulated power cable systems rated 5 kV and above. It applies to all types of dc power cable that are intended for the transmission or distribution of dc electric power. The test levels given assume that the cable systems have an effectively grounded neutral system or a grounded metallic shield.

定价： 59元 / 折扣价： 51 元

a. Clause 4.10.4 the ratio of zero and positive sequence currents in single phase capacitive switching procedure should be less than 3.0 rather than greater than 3.0. b. Errors in clause 4.10.9.1.8 and 4.10.9.2.7 regarding reference to the procedure for separate making tests. c. 4.10.9.1.3 change in punctuation for clarity d. Throughout document unify terms for rated voltage, including in equations to use "Ur" rather than "V" f. Clause 4.1.2 i) is missing some words required for clear meaning.… read more g. Correct references and terms used by both C37.04 and C37.09 so they are identical h. Remove classification of tests in the Scope as only design tests are covered. i. Clauses 4.5.7 and 4.5.8.1 to make clear that average of the test impulses shall be equal or higher than rated value j. clarify in 4.8.2.7. which tests to be performed at minimum control voltage k. Correct item list in 4.8.2.3.3 l. Correct title of Figure 3 and correct Figure 4 (example for incorrect grounding condition given) m. Correct arcing window/multiplier in Table 5 n. Correct item list in 4.8.5.4.3 o. correct the steps of electrical degrees for capacitance switching duties in 4.10.9.2.7 (30° for single- and 10° for three phase) p. further minor items depending upon agreement in the WG read less

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