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Why protection of electrical systems is important?
what is the electrical system protection
What advantage does an animal with endoskeleton have over an exoskeleton?
It gives it support rather than protection.
What is the balance chemical equation for the first law of thermodynamics?
dU=q-w where dU is the differential change in internal energy q is the differential quantity of heat added to a system w is the differential quantity of work done by a system on its surroundings
What advantage does the country who does not use the metric system have?
The country that does not use the metric system has the advantage that its old equipment continues to work. Its old measuring system continues to work. It does not need to make changes to sell in its own markets.
Which system of functions support protection of soft tissue mineral storage and blood formation?
Skeletal System
What is biased differential protection realy?
this is additionl of differential realy......
What is the type of generator protection to protect against unequal phase current?
differential protection
What is the definition of differential relay and how does it function?
In power transformer, a differential relay is a relay that verifies the balance of current between the primary and the secondary face of a transformer. It is also employed in other components of the power system like in protecting cables. Differential relay is also called a unit protection.
Why percentage differential protection is preferred over differential protectionfor internal faults?
if we are seeking for internal protection of transformer only, then if any external fault occurs then it will show the fault though it should not. what a percentage differential protection will do means, it will include a restraining coil which is excited by the current in the transformer itself. Also the percentage differential relay ha taps. So it is easy to avoid the external fault. for reference check 'theory and applications of transformer differential protection' by GEORGE W.McKENNA, AIEE transactions 1950,volume 69
What is advantages and disadvantages of endoskeleton and exoskeleton?
Advantage - Protection Disadvantage - Movement
What is differential transformer protection?
The current input (primary) to a transformer is proportional to the output (secondary) current. Differential protection relays monitor these via current transformers (CT). The percentage of difference between primary and secondary can be adjusted. If it is over the seting the relay will trip the primaryand secondary feeder breakers. Thus indicating an inbalance between internal phasewindings and or shorts to earth.
Which relay is used to protect generators and motors?
differential protection relay
Advantage of using differential Manchester coding than plain Manchester coding?
differential Manchester gives better noise immunity.
Application of differential pair while routing?
i want exact meaning of differential pair(or)definition & where its used ie.,(application) & advantage &disadvantage.
Dear all what direct consequences can be from Current transformer on generator with respect to differential protection relay?
CT's are used as inputs to the differential. If the CT is bad, or it is not wired to the differential correctly, it will cause differential current to be seen by the relay, resulting in a trip.
What is the advantage of having a gun in your home?
Protection
Why percentage differential relays do not normally need to be coordinated with the action of any other relay?
Differential relays should only operate for faults within the zone of protection, so there is no coordination issue. The reason to coordinate relays is for backup protection (a relay at a remote substation sees faults that should be cleared by another relay, for example). A differential will not see this fault, since it is external to it's zone of protection.
