Bus bars are simple in principle, complicated in practice:
Voltage drop is well known to electrical engineers and is defined by Ohm''s Law and the simplest of equations: V = I × R. The voltage drop is a
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Circuit Breaker Failure to Operate or Maloperation: Check the energy storage mechanism, closing/tripping coils, auxiliary switches, and secondary circuits. High-Voltage Fuse Blown: Measure voltage across the fuse terminals; inspect busbar joints, cable terminations, and. The voltage drop is a function only of the current value and the path resistance and is independent of the rail voltage. We have installed a 1970's vintage BVP17 type 11kV switchboard, made up of 17 CB's, manufactured by GEC (same as Reyrolle etc), and are in the process of connecting 2 new panels to the end of the board, with new 11kV busbar extensions. Busbars are exposed to high electrical stresses, and any failure in their insulation can lead to dangerous short circuits, arc flash events, or equipment damage.
