DocumentCode :
1618781
Title :
Incendivity of electrical sparking due to circulating currents in the enclosures of large electrical machines
Author :
Bartels, A.L. ; Bradford, M. ; Thompson, M.G.
Author_Institution :
ERA Technology Ltd., Leatherhead, UK
fYear :
1988
Firstpage :
141
Lastpage :
148
Abstract :
An explosion occurred within an electric motor on an off-shore platform in late 1985. It is considered that this ignition could have been the result of electrical sparking at the joints of the motor enclosure, due to circulating currents. The authors show that where circulating currents are interrupted by discontinuities at joints in the current path, arcing or sparking can occur which may be incendive, despite the very low voltages involved. The energy available for ignition depends upon the inductance of the current path and the magnitude of the circulating current. Test results indicate that in machines of interest, the effective inductance of the current path is typically 1 μH to 2 μH
Keywords :
electric motors; explosions; ignition; safety; sparks; arcing; circulating currents; current path; electric motor; electrical machines; electrical sparking; explosion; ignition; inductance; motor enclosure; safety;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Electrical Safety in Hazardous Areas, 1988., Fourth International Conference on
Conference_Location :
London
Print_ISBN :
0-85296-370-X
Type :
conf
Filename :
9557
Link To Document :
بازگشت