When assembling a MCC (Motor Control Center) or any other switchgear, the bus bars have to be torqued. The torque specifications are laid out by the manufacturer of the equipment. To find what the specifications are for the specific equipment, you have to find the assembly manual that is shipped with the equipment. Where the bus has been torqued at the factory you will see black marks where the employee has checked each nut that they have done. This is done to verify that none have been missed.
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For connection plates = 10-15 Nm
There's a world of difference. A torque wrench is a hand tool used to tighten fasteners to a preset torque specification. An impact wrench is a power tool which uses power actuated hammers to tighten a fastener for high torque applications.
The term, 'bus', in 'busbar', comes from the word, 'omnibus', meaning 'to serve all'. A busbar, then, is a copper bar that connects several independent circuits together. For example, a generator might be connected to a busbar, serving several circuits all connected to that same busbar. There are separate busbars for line, neutral, and earthing (grounding) connections.
infinite
what do you mean by 50 KA for 1 sec