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Switchgear

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001389
EISBN: 978-1-62708-215-0
... and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 , p 761 – 795 10.31399/asm.hb.v11.a0003548 During routine quality control testing, electrical switchgear devices exhibited high contact resistance and, in some cases, insulation of contacts by a surface film. The...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048120
EISBN: 978-1-62708-225-9
.... Blanking Switchgear Telephone equipment 1095 UNS G10950 Fatigue fracture The pawl spring shown in Fig. 1(a) was part of a selector switch used in telephone equipment. Three of these springs that broke and strip specimens of the raw material used to fabricate similar springs were examined to...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0091538
EISBN: 978-1-62708-233-4
... Abstract Electrical contact-finger retainers blanked and formed from annealed copper alloy C65500 (high-silicon bronze A) failed prematurely by cracking while in service in switchgear aboard seagoing vessels. In this service they were sheltered from the weather but subject to indirect exposure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001719
EISBN: 978-1-62708-231-0
... axle and wick assembly Fig. 2 Cutaway view of traction motor. Electrical power from the main diesel power driven generator is transferred to the traction motor, which in turn drives the axle/wheel set. Traction motors can also be used for braking the train. The switchgear is used to...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
... at the grain boundaries (arrows C). SEM. 320× After a fire in an electrical switchgear building, some cadmium-plated, high-hardness (47 HRC) steel fuse-holder clips were found to have broken. The fractures were intergranular, and cadmium was identified on the fracture face and in secondary...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006786
EISBN: 978-1-62708-295-2
... electrical switchgear building, some cadmium-plated, high-hardness (47 HRC) steel fuse-holder clips were found to have broken. The fractures were intergranular, and cadmium was identified on the fracture face and in secondary cracks by EDS. The cadmium on the surface appeared to have melted. It was concluded...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001811
EISBN: 978-1-62708-180-1
... a limited area. The types of metal components used in lifting equipment include gears, shafts, drums and sheaves, brakes and brake wheels, couplings, bearings, wheels, electrical switchgear, chains, steel wire rope, and hooks. This article will primarily deal with many of these metal components of...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... service in switchgear aboard seagoing vessels. In this service they were sheltered from the weather but subject to indirect exposure to the sea air. About 50% of the contact-finger retainers failed after five to eight months of service aboard ship. Figure 9(a) shows one of the contact retainers that...