Cable and Bus Bar
Electrical cables are used to connect two or more devices, which enables the transfer of electrical signals or power from one to the other. Cables can serve a wide range of functions such as long-distance communication through undersea cables, bulk transmission of alternating and direct current, lighting, power and control circuits in buildings etc. Cables are tailored for the specific functions they serve. For example, high-voltage cables are necessary for the bulk transmission of direct and alternating current.
Fault-handling strategies for electric cables
Typical faults in electric cables can be caused by factors such as improper joints, ageing and insulation damage caused by external factors like water, moisture and the shifting or depression of soil. These may lead to short circuits between conductors, earth faults or an open circuit. An effective strategy in handling faults in electric cables is to first ascertain the type of fault, and then to pinpoint the exact location of the fault. A series of tests are available to fulfill these functions.
Which parameters should be monitored?
Tests to measure fault resistance, earth resistance, voltage drop and several other parameters help in pinpointing cable faults.
A bus bar is a metallic bar or strip housed in switchgear, panel boards and busway enclosures for high current power distribution. It finds application in connecting high voltage as well as in low voltage equipment.
Fault-handling strategies for bus bars
Since bus bars are the point of coupling of many circuits, transmissions, generations or loads, a single fault in a bus bar can be as damaging as multiple faults in the system. Given the cascading effect of a bus bar fault, speed and stability are two recommended factors to be built into a maintenance strategy.