I have found myself in an interesting scenario that is actually more mechanical in nature but maybe you guys can point me in the right direction.
I am having a hard time finding any ISO, IEC, or ANSI specs that dictate a proper way to calculate the force required needed to make a bolted-jointed connection using a terminal on top of a bus bar.
Problem Statement: I need to find the torque value required for my bolted connection that can easily see 2,000Volts.
I am using a Burndy compression lug with M12 hardware. Burndy gives no recommended torque value and said it is dependent on the hardware.
For the 10.9 Grade hardware I am using, with a 75% proof load, this value is 70FT*lb. Very easy to get this information, no problem here.
The problem is, I am using a belleville washer, the supplier for the belleville washer is saying I should not exceed 40 ft-lb, and they are recommending 26-34ftlb. 34ftlb will fully flatten the belleville washer. Let's go with the average here and roll with 30Ft*lb.
Assuming the bus bar and terminal I am using will not yield to 30ft-lb (I am still waiting for exact copper grade from these suppliers so I can get the exact yield strength), but now I am worried that maybe 30FT-lb isn't enough for this connection regarding the clamp force needed between my terminal and bus bar.
Any advice? Any standards that someone may know of? Any electrical drive guys out there? :)