Need info on GE SF6 CTs

[chiefwvfc]

I am trying to find instruction manuals and drawings on the following:

GE SF6 345 KV Current Transformer
Part# HTSH710921 The following numbers are also related to these CTs HTHD75B119 AND HTHD74A179

BIL is 1050 kV.

the nameplate had the following data:
GE NATL BD 55002 DIV.1 Sh. 250 1971
HTSH 710921
HTHD 74A179
CHG P 75
MAX WP 110
MAX T 212 F
HDELLIP 172

I have contacted GE, but they have been unable to track down any information. Is there anyone out there that may know where they were in GE they were manufactured, or any other info?

 

[scottf]

I know GE made gas-filled CTs in Toronto, Canada during that time frame, but I am not aware if they made them in the US or not.