This standard applies to switching devices, interrupters, and interrupter switches (as defined in IEEE Std C37.100-1992) for alternating current, rated above 1000 volts and used indoors, outdoors, or in enclosures for which a switching rating is to be assigned.While this standard covers the basic requirements of interrupter switches used indoors, outdoors, and in enclosures, other standards such as IEEE Std C37.20.2-1993, IEEE Std C37.20.3-1987, IEEE Std C37.20.4-1996, IEEE Std C37.71-1984, and… read more IEEE PC37.73 (D.9, 1997) also contain requirements for switches used in enclosures. This standard does not apply to load-break separable insulated connectors, which are covered by IEEE Std 386-1995 [B7]. This standard also does not apply to circuit-breakers, circuit-switchers, or reclosers. read less
This guide describes tests performed and provides processes to be followed during the commissioning of electrical and control systems in hydroelectric plants. Guidance for methods to be used, organization, and execution of the testing are provided. While the guide does not provide prescriptive procedures that are plant and equipment specific, tests are described along with reference standards for more information. The commissioning of electrical equipment may be for a new hydroelectric plant… read more installation; rehabilitation of an existing hydroelectric plant; or replacement and upgrade of existing electrical equipment. read less
This document recommends performance characteristics and equipment for electric-hydraulic governors for all types of hydraulic turbines intended to drive electric generators of all sizes. This recommended practice is applicable to new governors and rehabilitation of existing governors.
To assist in providing a uniform method for calculating and measuuring torque pulsations which occur during starting of synchronous motors. Synchronous motors as discussed in this guide specifically refer to salient-pole type motors with wound main field circuits with either a continuous or interrupted amortisseur cage/ In modern installations, direct current is applied to the main field by means of slip rings from a static exciter or by a rotating brushless excitation system to establish synchronous operation.
This guide provides a set of procedures that can be used to cope with reradiation of AM broadcast signals from power lines. It can also be applied to other large metallic structures. While the procedures listed in this guide may be applicable to reradiation problems from other medium frequency (MF) sources, such as navigation beacons, they are not intended to be applied to reradiation problems from higher frequency sources, such as television broadcast signals. This guide is not designed to be applied as legal evidence of harmful effects of a reradiating structure upon an AM broadcasting station. In some jurisdictions, the government regulatory or licensing authority has defined specific procedures for the determination of radiation patterns of medium wave antenna systems. Some of these procedures are also contained in international treaties and agreements, and as such are binding on the licensees of the signatory jurisdictions. When there is agreement between the party or parties who are licensed to operate the medium wave antenna system(s) in question and the parties proposing construction of potential reradiating structures, the procedures of the responsible government agency or authority shall have precedence over the method outlined in this guide.
This document describes a software architecture for the firmware that controls a computer before the operating system has begun execution. Typically, firmware is stored in read-only memory (ROM) or programmable read-only memory (PROM), so that it may be executed immediately after the computer is turned on. The main jobs of the firmware are to test the machine hardware and to boot the operating system, usually from a mass storage device or a network. The operating system may also require other… read more services from the firmware. Finally, firmware often provides some support for interactive hardware and software debugging. In addition to the main operating system, other programs, such as diagnostic operating systems, may utilize firmware services. This standard uses OpenBoot PROM Architecture Specification [B6]1 as a starting point, and is bus, vendor, operating system (OS), and instruction-set-architecture (ISA)-independent. Supplements (numbered 1275. x) include specifications for this standard's application to particular ISAs and buses. This document specifies firmware that controls the operation of a computer system before the primary operating system has taken control of the machine. The material specified includes facilities for determining the hardware configuration; testing, identification, and use of plug-in devices prior to primary OS control; reporting the hardware configuration to the operating system; the user interface for controlling these operations; and debugging facilities for hardware and system software. Additional introductory material can be found in annex F. read less
The scope of this guide is to describe the effects and impacts of high temperature operation on conductors, connectors, and conductor hardware. The guide will identify operating metrics which constitute elevated temperature operation based on present industry practices and its effects on overhead line components, and it will suggest potential mitigation options to manage or avoid identified adverse impacts.