Requirements for the design and construction of control cabinets on power transformers.
Keywords:
cabinet,circuit,component,construction,control cabinet,controls,current transformer,design,IEEE C57.148,layout,manufacture
Product Code(s): STD97164,STDPD97164
Evaluate the ability of of fire doors to resist the passage of flame, heat, and gases with the latest testing provisions in the 2012 NFPA 252.
Revised to include updated references, the 2012 NFPA 252: Standard Methods of Fire Tests of Door Assemblies outlines methods of fire testing door assemblies that testing laboratories and manufacturers can use to determine assembly suitability when fire resistance of a specific duration is required. The Standard allows different fire door assemblies to be compared with each other in order to evaluate their relative performance as measured against a standard fire experience.
Cross References:
IEC 60060-1
IEC 60068-1:1988
IEC 60068-2-1
IEC 60068-2-2
IEC 60068-2-67
IEC 60068-2-6
IEC 60068-2-14
IEC 60068-2-17:1994
IEC 60068-2-20
IEC 60068-2-27
IEC 60068-2-30
IEC 60068-2-58:2004
IEC 60112
IEC 60216-1
IEC 60216-2
IEC 60270:2000
IEC 60664-1:2007
IEC 60672-2
IEC 60695-11-5
IEC 61000-4-5
IEC 61000-4-8
IEC 61000-4-9
IEC 62539
All current amendments available at time of purchase are included with the purchase of this document.
Keywords:
Semiconductor devices; Integrated circuits; Electronic equipment and components; Couplers; Coupled circuits; Magnetic devices; Electrical insulation; Ratings; Electrical safety; Electric shocks; Electrical measurement; Electrical testing
Product Code(s): 30249351
A method for real-time exchange of synchronized phasor measurement data between power system equipment is defined. This standard specifies messaging that can be used with any suitable communication protocol for real-time communication between phasor measurement units (PMU), phasor data concentrators (PDC), and other applications. It defines message types, contents, and use. Data types and formats are specified. A typical measurement system is described. Communication options and requirements are described in annexes.
Keywords:
data concentrator,DC,IEEE C37.118.2,PDC,phasor,phasor data concentrator,phasor measurement unit,PMU,synchronized phasor,synchrophasor
Product Code(s): STD97168,STDPD97168
Addresses achieving selective coordination at high levels of short circuit fault current in the instantaneous region of the circuit breaker time-current curve by use of selective coordination tools. This requires taking into consideration more information than is typically found on conventional Time-Current Curves TCCs only. This includes molded case circuit breakers and insulated case circuit breakers. It specifically addresses instantaneous selective coordination as achieving selective coordination at high levels of fault current, and may require taking into consideration more information than is typically found on conventional Time-Current Curves TCCs only.
The heating value or heat of combustion is a measure of the energy available from the fuel. The fraction or percentage of the heat of combustion that is converted to useful work is a measure of the thermal efficiency of an engine. Thus, a knowledge of the heat of combustion of the fuel is basic to the engineering of automotive engines. This SAE Information Report provides information on the standardized procedures for determining the heat of combustion of fuels that may be used for automotive engines.
This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability of technical requirements. Newer technology may exist.This recommended practice establishes generic reference standards that will accommodate nondestructive inspections (NDI) on a broad range of non-metallic composite honeycomb structures found on aircraft.The purpose of this Aerospace Recommended Practice (ARP) is to describe the design and production of composite honeycomb calibration standards to be used in ultrasonic, resonant, and tap test NDI equipment calibration for accomplishment of damage assessment and post-repair inspection of aircraft composites. These standards may also be appropriate for other NDT methods but will need to be assessed as appropriate prior to their use. The standards are representative of damage found in the field and include typical flaw scenarios such as disbonds and delaminations. It is intended that these standards be adopted by aircraft Original Equipment Manufacturers within procedures contained contained in their Nondestructive Testing Manuals. Depending on the nature of the inspection, it may be necessary to compensate for variations in material properties through the use of correction factors or by adjusting for these differences on the part or structure being inspected. In certain instances, it may be desirable or necessary to design a new reference standard to accommodate a specific inspection application.Currently, the recognized number of composite honeycomb construction variables makes the resulting number of specimens very large and unmanageable. Inspection characterizations and equipment responses have been used to determine the important variables needed in a composite reference standard thus eliminating unnecessary standard configurations. This ARP describes a workable number of reference specimens that can meet the needs of a broad range of honeycomb structures found on aircraft.
