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What is difference between high impedance busbar protection scheme and low impedance busbar protection scheme?
Wiki User
∙ 12y ago
high impedance circit provides a varistor unit which has stabilising resistor which ll protect the relay from being operating for maloperations like through fault, CT faults whereas this varistor unit is provided internally in an numerical relay where the CT of class 5P can be used.
Wiki User
∙ 12y ago
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What is difference between to busbar and feeder?
The busbar is used as a conductor and is used as a connection between the parallel and the feeder. The feeder is the supply, and it handles the relays.
What is the difference between busbar and busbar trunking system?
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What Happen if BUS BAR Protection relay fails?
In the event of a busbar fault, the next level of protection will operate and disconnect the busbars.
What are the major equipment of substation?
Transformers, circuit breakers, isolators, busbar systems, earthing systems, protection systems.
What is meant by 1.55 in busbar current calculation?
Busbar current rating for 1 square inch is 1000a.
What is difference between to busbar and feeder?
The busbar is used as a conductor and is used as a connection between the parallel and the feeder. The feeder is the supply, and it handles the relays.
What is the difference between busbar and busbar trunking system?
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What Happen if BUS BAR Protection relay fails?
In the event of a busbar fault, the next level of protection will operate and disconnect the busbars.
What are the major equipment of substation?
Transformers, circuit breakers, isolators, busbar systems, earthing systems, protection systems.
What is difference between bus and wire?
One of them is a form of transport and the other one allows electricity through it.AnswerA 'bus' (busbar) is a conductor that provides a common point of connection for several circuits.
What is unit protection?
Unit protection is one whereby the power network system is divided into discrete zones of protection. Each zone is provided with relays and circuit breakers to allow for the detection and isolation of its own internal faults. Example of zones of protection by Unit protection schemes are Generator protection, Busbar protection, Feeder protection, Transformer protection and Motor protection.By Makenote Tshuma
What is the torque for a 800Amps electrical busbar?
65 N/m is sufficient for 800A Busbar.
What is meant by 1.55 in busbar current calculation?
Busbar current rating for 1 square inch is 1000a.
What is the use of check zone in bus bar protection?
It provides stability in case of problems with disconnectors auxiliary contacts (stuck contacts or wiring problems). Ir relies on the feeder currents in the busbar. Disconnectors positions are not required. There is no selectivity using check zone. It's usefully because it prevents external faults to be considered as a busbar fault.
What a bus bar?
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.
What is mean by busbar in electrical engineering?
it is an infinite current carrying conductor which doesn't have voltage drop.
What is bus bar and how it is connected to the genarator?
The term, 'bus', is derived from the word, 'omnibus', meaning to 'serve all', and that's exactly what a busbar does.A busbar is a length of conductor which offers a common point of connection for several circuits. For three-phase systems, one busbar is required for each of the three lines and (where necessary) for any neutral. A separate busbar is used to interconnect the various earth (ground) connections.In the case of a power station, one or more generators can be connected to the same busbar system, as are the various transformers supplying the circuits leaving the power station. Normally, each input/output circuit is connected to the busbar system, not directly, but through circuit breakers and isolators.
