Shaft voltage is for what use in Generator?
Shaft voltage is for what use in Generator?
(OP)
What is the main purpose of shaft voltage in generator?
How it is connectedin generator?
Regards
How it is connectedin generator?
Regards
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
Shaft voltage is for what use in Generator?
|
RE: Shaft voltage is for what use in Generator?
To avoid this current flowing the loop is broken by insulating one pedestal /usually the non-driving end/or the top bracket in a vertical machine. The voltage will still exist, but no current will flow. Theoretically that is.
To check the integrity of the bearing insulation some clever methods have been used-
1.- A small slip ring or surface is provided on the shaft end to measure the presence of this voltage, if it exists then the bearing insulation must be ok. A few volts to millivolts.
2.- a special split core CT is put around the shaft at the driven end to detect the presence of current. No current: ok. A special relay type was developed by ASEA for this a couple of decades ago.
Other ways?? Who else can respond?
rasevskii