Stainless Steel Bolts Used for Switchboard Connections
Stainless Steel Bolts Used for Switchboard Connections
(OP)
I am involved with a project where the electrical contractor has used stainless steel bolts and nuts for the connection of the Hv feeder and LV mains cables onto the 11kV/433V 1.5MVA transformer as well as on the connection of the mains cables onto the LV main switch. In the past I have always used high tensile bolts and was under the impression high tensile bolts are preferrable to stainless steel because of strength. Fault current is about 27kA at the 415V connections.
Can I get peoples opinions of using stainless stell bolts instead of high tensile steel bolts and nuts.
Thanks.
Can I get peoples opinions of using stainless stell bolts instead of high tensile steel bolts and nuts.
Thanks.






RE: Stainless Steel Bolts Used for Switchboard Connections
Dik
RE: Stainless Steel Bolts Used for Switchboard Connections
Less eddy currents in stainless. Less current through the bolt.
Bill
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"Why not the best?"
Jimmy Carter
RE: Stainless Steel Bolts Used for Switchboard Connections
RE: Stainless Steel Bolts Used for Switchboard Connections
RE: Stainless Steel Bolts Used for Switchboard Connections
My first question would be what bolts were used for attaching the cables during short circuit test?
The stainless bolts maybe okay provided that they can be tightened to obtain the same preload as the original bolts without being over tightened.
I assume the contractor was given some instruction as to torque settings he should use, if you have that information and details of the joint we might be able to help further.
desertfox
RE: Stainless Steel Bolts Used for Switchboard Connections
Dik
RE: Stainless Steel Bolts Used for Switchboard Connections
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