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345kv Disconnect - 64C Rise

345kv Disconnect - 64C Rise

345kv Disconnect - 64C Rise

(OP)
Attached are two images of a 345KV manual disconnect.

http://maintenanceforums.com/evefiles/attachments/7/0/7/7071076041/7071076041_Y601_Disconnect.ppt?ts=429F65B9&key=4529C3CDE765E9681CD74132E5D8D178&referrer=http%3A%2F%2Fmaintenanceforums.com%2Feve%2Fubb.x%2Fa%2Fga%2Ful%2F8071076041%2FY601_Disconnect.ppt

This is one of two parallel paths through which flows a total of 1250MW. (You can calculate the total current from that if you want).

(This is the generator bay in a breaker and a half scheme.)

First reading waS 64c rise in a 7.5 mph wind.

Second reading two days later approx 10C rise in a 2.5 mph wind.

The total loading has not changed. Division of load between the two parallel paths is unknown (I assume it splits based on impedance of the two paths).

How serious would you view this? What do you make of the fact that it has gone down? What would you consider the risks would be if switching was done that opened the parallel path to put all the load through this hotspot?

Thx

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