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A current transformer's secondary must never be open-circuited. If the instrument fed by a CT needs to be removed, then the secondary terminals must be short-circuited first. This is because a large, and potentially-dangerous, secondary voltage will appear across an open-circuited CT. Normally, a set of links is provided at those terminals for this purpose.
What else can I help you with?
What is a shunted winding?
A winding that has several coils shorted together.
Why capacitor allows ac and not dc?
CAPACITOR BLOCKS DC SUPPLY .THERE ARE MAINLY TWO ANSWERS 1.CAPACITIVE REACTANCE Xc=1/( 2*3.1416*F*C) , HERE THE FREQUENCY OF DC SUPPLY IS ZERO .HENCE THE REACTANCE VALUE IS INFINITY .SO IT BLOCKS THE DC SUPPLY. 2.CURRENT THROUGH A CAPACITOR IS PROPORTIONAL TO THE RATE OF CHANGE OF CURRENT . BUT IN THE CASE OF DC SUPPLY, THE RATE OF CHANGE OF CURRENT IS ZERO. HENCE THE CAPACITOR CURRENT IS ALSO ZERO. H.L.kiran
What is the Difference between shunt capacitor and shunt reactor?
One is a capacitor and one is a reactor. Shunted capacitors are used to raise th voltage in the power system, while shunt reactors are used to lower it. Capacitors are typically installed close to load because of this; reactors are typically on very high power lines where the capacitance of the power line can cause severe overvoltages when loading is light, and at large generating stations.
Why earthing is required for electrical installation?
If an electrical device fails it can send current to the housing of the device or to any of the controls that are available to the user. "Earthing" or "Grounding" as we generally call it in the United States, causes that current to be shunted to ground, making life a lot safer for people and other living creatures. In the scenario above, the "hot" wire touching an ungrounded metal box would become a death trap -- anyone touching it could "complete" the circuit and be electrocuted. If the box were grounded, then the hot would be short-circuited and the over-current protection should shut off the power before anyone touches it. Similarly, a broken neutral wire in an ungrounded component could prove lethal to anyone who contacts the component and completes the circuit. Unfortunately,a neutral short to a grounded box would not trip the breaker, like a hot would, but at least there is a "path to ground" through the safety ground rather than through a person.
In what two ways can the speed of a dc motor be varied?
speed of a dc motor can be varied by mainly two methods:- 1)field control method 2)armature control method further , field control method can be divided in 3 parts:- 1)field rhestat control method---speed variation is acomplished by means of a variable resistance inserted in series with shunt field 2)reluctance control method---by changing the reluctance of magnetic circuit by choosing right material.. 3) field voltage control method-requires variable field voltage supply. and armature control method can be divided in 3 parts :- 1)armature resistance control---variable resisitance connected in series with armature 2)shunted armature control. 3)armature voltage control. ------------mrityunjay pandey (kiit university ,btech 2nd year)
What does shunted mean?
Shunted means to divert or switch a flow of something, often to a different path or direction. This term is commonly used in the context of electrical circuits where a shunt is a device used to redirect electrical current.
What are the differences between shunted and non-shunted tombstones and how do they affect the performance of lighting fixtures?
Shunted tombstones have internal connections between the two sockets, while non-shunted tombstones do not. This affects the performance of lighting fixtures because shunted tombstones are used with electronic ballasts, while non-shunted tombstones are used with magnetic ballasts. Using the wrong type can cause the fixture to not work properly or even damage the ballast.
What are the differences between shunted and non-shunted tombstones?
Shunted tombstones have internal wiring that connects both ends of the lamp holder, allowing for use with instant-start ballasts. Non-shunted tombstones do not have this internal wiring and are used with rapid-start or programmed-start ballasts.
Can you bring shunted magnets on an airplane?
no
What is a shunt reactor?
A shunt reactor absorbs reactive power and increases the energy efficiency of any system. It is a small device used for power compensation in high voltage transmission lines and cable systems.
What is a shunted winding?
A winding that has several coils shorted together.
What is shunted?
A conductor having low resistance in parallel with another device to divert a fraction of the current. It is sometimes called a Resistor. The causative diversion of venous blood into oxygenated arterial blood and thus mixing is also a shunt. "shunting"
What are the benefits of using non-shunted tombstones in fluorescent lighting fixtures?
Non-shunted tombstones in fluorescent lighting fixtures provide better electrical contact, reduce the risk of electrical shorts, and improve overall safety and efficiency of the lighting system.
What is a shunted motor?
A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.
What are the common issues associated with a shunted lamp holder and how can they be resolved?
Common issues associated with a shunted lamp holder include flickering lights, dimming, or the lamp not turning on at all. These issues can be resolved by checking and replacing the wiring connections, ensuring the lamp holder is properly grounded, and replacing the lamp holder if necessary.
What can cyanosis cause?
Typically oxygen deprivation, but it is common it conditions like hypothermia and hypovolemic shock, where blood is shunted away from the skin to preserve the vital organs. Another cause in neonates is a congenital heart defect known as tetrology of fallot, where venous blood is shunted back through the systemic circulation instead of the pulmonary circulation.
What causes cyanosis?
Typically oxygen deprivation, but it is common it conditions like hypothermia and hypovolemic shock, where blood is shunted away from the skin to preserve the vital organs. Another cause in neonates is a congenital heart defect known as tetrology of fallot, where venous blood is shunted back through the systemic circulation instead of the pulmonary circulation.
