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Power equipment

Relay - High impedance three element differential protection relay IVp - Windings ol a power equipment or section ol a power system to be protected... [Pg.479]

As with any power equipment, gas turbines require a program of planned inspections with repair or replacement of damaged components. A properly designed and conducted inspection and preventive maintenance program can do much to increase the availability of gas turbines and reduce unscheduled maintenance. Inspections and preventive maintenance can be expensive, but not as costly as forced shutdowns. Nearly all manufacturers emphasize and describe preventive maintenance procedures to ensure the reliability of their machinery, and any maintenance program should be based on manufacturer s recommendations. Inspection and preventive maintenance procedures can be tailored to individual equipment application with references such as the manufacturer s instruction book, the operator s manual, and the preventive maintenance checklist. [Pg.744]

Not only the buildings themselves, but an allowance for equipment and stocks within the buildings must be included in the cost estimates, such as maintenance shop power equipment, control laboratory analytical equipment and reagents and, largest of all, the thousands of warehouse equipment spares, fittings, and supplies. For feasibility cost estimates, such items are factored from experience. [Pg.229]

This report addresses ammonia plant shutdowns over the listed time period in 40 countries. It provides a basis for comparing plant performance area by area leading to better control of reliability efforts while reducing maintenance and unplanned shutdown costs. Data are presented for shutdowns due to power, equipment, instrumentation, feedstock and product inventory control. [Pg.47]

Relays have inputs from several current transformers (CTs) and the zone of protection is bounded by these CTs. While the CTs provide the ability to detect a fault inside the zone, circuit breakers (CBs) provide the ability to isolate the fault by disconnecting all of the power equipment within the zone. Thus, a zone bonndai y is usually defined by a CT and a CB. When the CT is part of the CB it becomes a natural zone boundaiy. When the CT is not an integral part of the CB, special attention must be paid to the fault detection and fault interruption logic. The CT still defines the zone of protection, but communication channels must be used to implement the tripping function. Figure 1 shows the zones of protection in a typical system. [Pg.415]

Rig type and performance of drilling personnel (rig size, degree of automation, power equipment, etc.)... [Pg.1090]

Normal ventilation equipment can be used unless the fumes are corrosive or flammable. Powered equipment is normally employed to ensure that a steady airflow is provided. Since the ventilation will be needed in both summer and winter, there will be an energy penalty for the high level of airflow, and either the inlet airflow must be pre-heated or additional space heating will be required. The extra heat requirement is given by... [Pg.429]

While designers of fluid power equipment do what they can to minimize turbulence, it cannot be avoided. For example, in a 4-inch pipe at 68°F, flow becomes turbulent at velocities over approximately 6 inches per second (ips) or about 3 ips in a 6-inch pipe. These velocities are far below those commonly encountered in fluid power systems, where velocities of 5 feet per second (fps) and above are common. In laminar flow, losses due to friction increase directly with velocity. With turbulent flow, these losses increase much more rapidly. [Pg.590]

Fluid power equipment is designed to reduce friction as much as possible. Since energy cannot be destroyed, some of the energy created by both static pressure and velocity is converted to heat energy as the fluid flows through the piping and components within a hydraulic system. As friction increases, so does the amount of dynamic and static energy that is converted into heat. [Pg.592]

Protection of Electrical Power Equipment against Climatic Conditions , BS CP 1014 (1963)... [Pg.242]

There is unusually strong justification for the historical approach in presenting the important facts about x-rays to analytical chemists the information these chemists need in their work is largely that discovered in the early researches. This is particularly clear in connection with absorption and emission spectra, in which more refined investigations with more powerful equipment later revealed important complexities that the analytical chemist may ignore. Several of these complexities will be recorded below. [Pg.36]

Wabash Power Equipment Co. Various internet sourced, product information notes, http //www2.thomasregister.com, 1998. [Pg.770]

A6. Hattori, K. and Aikawa, S Scheduling and Planning Inspection of C-0.5Mo Equipment Using The New Hydrogen Attack Tendency Chart, pvp.Vol. 239/MPC-Vol. 33, Serviceability of Petroleum Process and Power Equipment, ASME, 1992. [Pg.11]

Wires and cables just carry the electric current and the electric network needs a multitude of other electric equipment including connectors, switches. .. electric power equipment motors and controls measuring and control equipment lighting and wiring equipment current-carrying equipment non-current-carrying wire devices pole line hardware. [Pg.112]

American chemists and physicists Glenn T. Seaborg, Ralph A. James, and Albert Ghiorso Reactive metal produced by bombarding plutonium-239 with helium nuclei named for Pierre and Marie Curie useful for powering equipment in remote locations. [Pg.253]

The supplier of electrostatic powder coating is providing the powder to the user. The powder is applied in coating the components of the power equipment (external frames of high and low voltage electric equipment). Under the... [Pg.56]

Recently there has been growing interest in power factor correction circuitry. Power factor, which is defined as the ratio of the apparent required power to the actual true power, ultimately affects the circuit s efficiency, thus varying the cost of electricity. It seems that almost all AC-powered equipment now require some form of active power factor correction in order to operate efficiently. Active power factor correction utilizes electronics to force the input current to look like a... [Pg.112]

Dependable information has been developed for the heat rejector requirements of different types of power equipment air compressors, refrigeration equipment, steam condensers, diesel engines and natural gas engines. Table 5.1 gives information on the heat absorbed by cooling water for this type of power equipment. [Pg.104]

We can deduce that, when using 12-pulse-power conversion equipment, harmonics below the 11th harmonic can be made insignificant. The total harmonic distortion is also considerably reduced. Twelve-pulse-power conversion equipment costs more than six-pulse-power equipment. Where harmonic currents are the primary concern, 24-pulse-power conversion equipment may be considered. [Pg.114]


See other pages where Power equipment is mentioned: [Pg.360]    [Pg.338]    [Pg.88]    [Pg.336]    [Pg.182]    [Pg.257]    [Pg.1106]    [Pg.130]    [Pg.74]    [Pg.20]    [Pg.66]    [Pg.627]    [Pg.55]    [Pg.129]    [Pg.837]    [Pg.223]    [Pg.296]    [Pg.471]    [Pg.4]    [Pg.339]    [Pg.88]    [Pg.336]    [Pg.89]    [Pg.89]    [Pg.228]    [Pg.232]    [Pg.238]    [Pg.29]    [Pg.72]   
See also in sourсe #XX -- [ Pg.176 ]

See also in sourсe #XX -- [ Pg.245 ]




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