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38kV overcurrent protection

38kV overcurrent protection

38kV overcurrent protection

(OP)
Has anybody ever used a SCADA-Mate by S&C.  My problem exists because we have connected to the utility at an overhead pole and our wire needs protection.  I would like to install a fused cutout to match my wire size, but have been told that I can't install a fused cutout because they have to feed underground distrubtion and we are going overhead.  At the point of connection I have an S&C scada-mate which says it has overcurrent fault protection on page 7.  I would just have to connect the CT's to that device and would have the necessary protection. That would satisfy my requirement?

Thanks,

RE: 38kV overcurrent protection

I set one up about a month ago.  It was pad mounted switchgear, but I believe the over current unit is the same.  In my case the CT's were integral to the unit.  

The only problem I ran into was that the required communication and power cables for the unit were not supplied.  To S&C's credit, they found a local sales rep about an hour away that lent me the cables.

There was no easy way to test the unit with traditional secondary injection methods.  I have an old Sverker that I used to test via primary injection.  I don't recall if S&C makes a secondary cable adapter.  The unit was accurate and fairly user friendly (uses hyper-terminal to configure with a menu based system).

RE: 38kV overcurrent protection

Page 7 indicates that the control is capable of fault detection.  The switch only has a 600A interrupting rating, so it is not capable of fault interruption.  I guess the fault detection capability is for distribution automation purposes, not for fault protection.

Quote:

I would like to install a fused cutout to match my wire size, but have been told that I can't install a fused cutout because they have to feed underground distrubtion and we are going overhead.
I don't understand this; can you explain further?  

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