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electrical fault isolation

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Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004118
EISBN: 978-1-62708-184-9
... V) than the surrounding earth. This can be accomplished by various methods, but for pipe-type cable all systems must have one thing in common. They must be capable of safely conducting high alternating current (ac) fault currents to ground. Such faults occur when the conductor comes in electrical...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004115
EISBN: 978-1-62708-184-9
... in the location of sacrificial anodes to ensure an adequate current will discharge from them and because they could be a source of ac pickup. In one documented case, this in turn caused an explosion when the ac surge arced across an isolating flange ( Ref 13 ). Dividing the system into several electrical...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005909
EISBN: 978-1-62708-167-2
... improvements and changes to the system, but the basic measurements are the same. As depicted in Fig. 5 , the ground leakage current (or the isolation resistance) is measured between the induction coil and the grounded melt. Therefore, the melt must be electrically contacted with a bottom electrode (also...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003503
EISBN: 978-1-62708-180-1
... and Quality Assurance The FMEA provides test engineers with information on anticipated failure modes and causes, against which to match fault detection and isolation capabilities. These are used to ensure that all failures can be detected, that appropriate tests are developed, and that built-in tests can...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006400
EISBN: 978-1-62708-192-4
... to capture infrared radiation emitted by an object to locate any abnormal temperature pattern or thermal anomaly, which indicates possible faults, defects, or inefficiencies in a machine. The infrared thermography technique has been successfully applied for CM of electrical and mechanical equipment. Also...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002436
EISBN: 978-1-62708-194-8
... and technical methods of risk/hazard analysis practiced in the industry to identify possible hazards and the resources necessary to avoid or reduce risks. These methods include the failure mode and effect analysis, fault tree analysis, event tree analysis, risk/benefit analysis, safety analysis...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005852
EISBN: 978-1-62708-167-2
..., National Electric Code clearance requirements, monitoring requirements, and machine accuracy that need to be considered when designing induction equipment. induction hardening process monitoring programmable logic controllers quality assurance statistical process control Controlling...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004113
EISBN: 978-1-62708-184-9
... to existing corrosion conditions should be obtained in sufficient quality to permit reasonable engineering judgments. Statistical procedures should be used in the analysis, if appropriate. Electrical Isolation Electrical isolation of structures must be compatible with electrical grounding...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005669
EISBN: 978-1-62708-198-6
..., diffusionless (martensitic) phase transformation as occurs with face-centered cubic to hexagonal close-packed transformation in cobalt-chromium alloys, and stacking faults and twins and their role in this transformation. It also discusses the strengthening mechanisms that are responsible for the mechanical...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004112
EISBN: 978-1-62708-184-9
... Locating areas of stray-current pickup and discharge Identifying possible shorted casings Locating defective electrical isolation devices Detecting unintentional contact with other metallic structures Testing current demand and current distribution along a pipeline Locating possible high-pH...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005843
EISBN: 978-1-62708-167-2
... supply may use reactors in the direct current (dc) input to the power supply and/or in the output portion of the circuit for load matching purposes. Isolation and/or autotransformers typically are used at the output of the power supply to match the voltage of the heat station components (capacitors...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004167
EISBN: 978-1-62708-184-9
... Abstract This article presents the fundamentals of stray-current corrosion caused by electric rail transit systems. It describes the various corrosion-control design elements for the electric rail system. These design elements include substation spacing and grounding, track and track slab...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005840
EISBN: 978-1-62708-167-2
... is allowed to move in these applications, the copper eventually will work harden, and failure will occur. The studs that run between the two end plates which hold the coil in compression in low-frequency applications must be electrically isolated so that recirculating currents are not set up. Fig. 12...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006544
EISBN: 978-1-62708-290-7
... System Testing”), NFPA 10 (“Standard for Portable Fire Extinguishers”), NFPA 13 (“Standard for the Installation of Sprinkler Systems”), NFPA 70 (“National Electric Code”), and NFPA 72 (“National Fire Alarm and Signaling Code”). Note that one cannot just pick and choose their way through NFPA standards...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005842
EISBN: 978-1-62708-167-2
... successfully at even higher frequencies (100+ kHz) ( Ref 1 ). Individual laminations must be electrically isolated from each other. Mineral and organic coatings provide insulation. The thickness of individual laminations should be held to a minimum to keep eddy-current losses low. The typical thickness...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005621
EISBN: 978-1-62708-174-0
... through short circuit. Courtesy of Edison Welding Institute Systems involving two gas metal arcs in a single torch provide interesting additional challenges and opportunities to increase welding speed and deposition rate. These systems typically operate with current isolation and asynchronous...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005851
EISBN: 978-1-62708-167-2
... sink is positive, while the other side is negatively charged at the exact same moment. Both sides of the SCR share the same water, and the hose length between these electrical potentials isolates the high voltage from the next component in the water circuit and from the electrically grounded water...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004100
EISBN: 978-1-62708-184-9
... constructed pipelines, locating areas of stray-current pickup and discharge, identifying possible shorted casings and defective electrical isolation devices, locating possible high-pH stress-corrosion cracking risk areas, and locating areas at risk of external corrosion. Storage tanks are designed...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005196
EISBN: 978-1-62708-187-0
... units have been built with a capacity of over 2200 M T (2400 tons) powered by 6 inductors rated at 6000 kW each for holding applications. Induction furnaces require much cleaner scrap than cupola furnaces and somewhat cleaner scrap than electric arc furnaces. The capital costs are higher than those...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006827
EISBN: 978-1-62708-329-4
... are also presented. The article introduces several frequently used methods for solder joint failure detection, prevention, and isolation (identification for the failed location). failure analysis solder alloys solder joints soldering SOLDERS OR SOLDER ALLOYS are well-known metal-based...