Build up of voltage

[msq]

What would cause the following to happen:
In a high voltage switchyard, a three step platform near SF6 breaker has a build up of voltage i woul expect it resulting from induction from the nearby overhead exposed buses. The platform is grounded at one end.

 

[bennie]

Re: Build up of voltage

How are you detecting this voltage?

 

[paul renshaw]

Re: Build up of voltage

How far is the platform from the buss? What is the voltage in the station? Is the platform connected to a common grounding grid in the substation? Is the breaker frame connected to the grid?

[ March 19, 2003, 11:55 AM: Message edited by: paul renshaw ]

 

[bphgravity]

Re: Build up of voltage

Are you sure that this is actually induced potential in the platform? It sounds to me like this might be static build up and discharge. You stated the platform is grounded, so I imagine that it is actually a person approaching the platform that has the charge and in effect creates a potential between themselve and the platform.