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 Post subject: Labels on electric utility equipment
PostPosted: Mon Aug 11, 2008 9:48 am 
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Joined: Sat Jul 26, 2008 5:00 pm
Posts: 28
Are any utilities labeling padmount transformers placed at customer locations where the customer has access to the secondary side? I would think this would usually be category 4 or Dangerous due to the upstream fuse. Do you place the labels on the outside of the transformer?


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PostPosted: Wed Aug 27, 2008 6:53 am 
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Joined: Sun Dec 23, 2007 1:44 pm
Posts: 348
Location: Charlotte, NC
LLB,

Just curious....what are the circumstances in which the utility would allow customer access to the secondary side of the transformer? Don't know that I have seen that.

Thanks,
Alan


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PostPosted: Wed Aug 27, 2008 8:07 am 
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Joined: Thu Mar 13, 2008 4:23 am
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Location: Canton, OH
Is the transformer utility owned or customer owned? If it's a customer owned transformer the customer would have access to the secondary side of the transformer.
Hopefully the customer has done an arc flash study and knows what PPE is required for work on the secondary side of the transformer. However, if the utility owns the primary cable they could require access to the primary side of the transformer. Is the HV and LV in seperate compartments? If so do you need seperate labels? We are currently debating this. You would have to be PERFECTLY clear if you start placing two different labels on the transformer.
We have not decided how we will handle the transformer labeling yet. Not sure if we will laminate labels and secure them to the outside of the transformer or use a database which the lineman will check before work.


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PostPosted: Wed Aug 27, 2008 3:48 pm 
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Joined: Wed Jun 04, 2008 9:17 am
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Location: Spartanburg, South Carolina
Unless there is an internal secondary breaker, the incident energy is likely to be higher on the secondary side. You need to open the secondary side of a padmount transformer to access the primary side, so normally, a label giving the secondary requirements would be adequate.


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