Stress Cones/Voltage Grading Sleeves for 15kV Connections
Stress Cones/Voltage Grading Sleeves for 15kV Connections
(OP)
A little background. I am a ME, working on a new project with EE overtones. We are designing a new (for us) generator with a terminal voltage of 13.8kV. For design purposes, we have assumed a voltage grading sleeve length of 16 inches, with a 3-inch lug to connect to the generator. The output connection enclosure manufacturer has assumed a sleeve length of 12 inches, but is unable to provide the make or model number and we don't have room to enlarge the enclosure. While we have access to EE's, my boss wants me to be knowledgeable of the situation. So, does anybody know of commercially available 13.8/15kV stress cones? Not to be rude, but I don't need theory or calculations, I need manufacturers and part numbers. My company's conservative approach is that the part is only good for what the manufacturer will back it for, not what I or anyone else calculates it is good for.
Thank you in advance.
Blacksmith
Thank you in advance.
Blacksmith






RE: Stress Cones/Voltage Grading Sleeves for 15kV Connections
RE: Stress Cones/Voltage Grading Sleeves for 15kV Connections
Thanks,
Blacksmith
RE: Stress Cones/Voltage Grading Sleeves for 15kV Connections
See http://www.3M.com/elpd
RE: Stress Cones/Voltage Grading Sleeves for 15kV Connections
Generator termination failures have fault contribution from two directions—the local stator and the rest of the system they’re tied to.
RE: Stress Cones/Voltage Grading Sleeves for 15kV Connections
RE: Stress Cones/Voltage Grading Sleeves for 15kV Connections
http://www.raychem.com/products/epd/rrg/3-15.pdf
RE: Stress Cones/Voltage Grading Sleeves for 15kV Connections
1. Grigsby L. L., "The Electric Power Engineering Handbook," CRC/IEEE Press, 2001
Reference 1 page 3-173 Par. "Capacitance - Graded Bushings"
RE: Stress Cones/Voltage Grading Sleeves for 15kV Connections
The recommendations made above regarding 3M and Raychem are where I would check first. Depending on the cable diameter, some of the 3M indoor terminations (the 7600 series) are under 12 inches, but I if your generator is large enough to require cables with greater capacity (anything larger than 4/0) then their terminations exceed your 12" limitation.
In the past, Raychem has been able to come up with some terminations for electrical testing that fit on remarkably short cutbacks, so they are also a good bet.
RE: Stress Cones/Voltage Grading Sleeves for 15kV Connections
http://www.chardonelectrical.com/terminat.html
http://www.bsescontracts.com/main.asp?clink=35msc#applications
etc. for more info