[Sneap] sparking problem

[Miller, Thomas Edward]

SNEAPERs:

 

I need your advice. For our 2 drive motors inside the tank we have PI
filters inside a metal box in series with the 2 motors. Connections from
the tank feedthrus are made with copper conduit to the box and then to
the motor. It was found that spark damage inside the copper conduit
between the wires and the copper conduit had damaged the wires that are
between the motor and PI filter box. What was done was the PI filter box
was mounted outside the tank and the conduit connecting both the PI
filter box to the tank feedthrus and the tank feedthrus to the motors
was replaced with plastic conduit. What this did was bring the spark
energy outside the tank where it can now damage equipment outside the
tank. 

 

What is your recommended solution, i.e. how have you guys done it?

 

I would like to have a better robust filtering for the motors on the
inside to prevent the spark energy from getting out of the tank and a
better conduit system. Seems like spark energy is traveling thru the
motor 208 VAC wires and needs to be removed right at the motor. Any help
would be great.

 

Thank you. Cheers!!!!

 

  Tom Miller

  Purdue University

  millerte at purdue.edu

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