This test is performed by connecting the meter leads between the nearest available grounding electrode and the busbar in the Telecom Room. 1 ohms (100 milliohms)Busbars simplify high-current distribution, reduce clutter, and can improve reliability if sized correctly. Busbar design is still resistance/heat engineering: thickness, width, material, and mounting affect performance. Plan for continuous current + surge; hotspots often occur at studs and. Voltage drop is well known to electrical engineers and is defined by Ohm's Law and the simplest of equations: V = I × R. Although the percentage of loss is obviously far greater. Line protection concepts, such as overcurrent and distance arrangements, satisfy this requirement, even though short circuits in the busbar zone are cleared after certain time delay. In determining the impedance of a power distribution. On the basis of the traditional busbar induction electric model, considering the factors that have a greater influence on the busbar induced voltage, such as the breaking capacitance of the circuit breaker and the lead wire capacitance to the ground, the busbar induction electric model based on. Design of busbars and connections in air insulated substation This chapter focusses on the design implications of connecting or rigid, single or bundled conductors to HV equipment with connectors/clamps, either bolted, welded or compressed.