The burden of protective Current Transformer (CT) is specified in

The burden of protective Current Transformer (CT) is specified in
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Answer :

The burden of protective Current Transformer (CT) is specified in Volt - Ampere

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Related questions

Burden of a protective relay is the power?

Last Answer : Burden of a protective relay is the power absorbed by the circuit of relay.

The operating point of a protective current transformer is near the

Description : The operating point of a protective current transformer is near the

Last Answer : The operating point of a protective current transformer is near the Ankle point

The burden value in Potential Transformer (PT) should be ______ to achieve low errors in PT:

Description : The burden value in Potential Transformer (PT) should be ______ to achieve low errors in PT: A) low B) high C) medium D) infinite

Last Answer : The burden value in Potential Transformer (PT) should be high to achieve low errors in PT: 

Burden of a protective relay is the power (a) required to operate the circuit breaker (b) absorbed by the circuit of relay (c) developed by the relay circuit (d) none of the above

Description : Burden of a protective relay is the power (a) required to operate the circuit breaker (b) absorbed by the circuit of relay (c) developed by the relay circuit (d) none of the above

Last Answer : (b) absorbed by the circuit of relay

Define the following terms with respect to protective relays i) Relay time ii) Reset current iii) Plug setting multiplier and iv) Time setting multiplier

Description : Define the following terms with respect to protective relays i) Relay time ii) Reset current iii) Plug setting multiplier and iv) Time setting multiplier

Last Answer : 1) Relay Time: The time interval between occurrence of fault and closure of relay contacts.  2) Reset Current: The value of current below which the relay resets and comes back to ... The adjustment arrangement provided for setting the operation time of relay is known as Time setting multiplier. 

If the fault current is 6000 A, the relay plug setting is 150% and the CT ratio is 400/5, the plug

Description : If the fault current is 6000 A, the relay plug setting is 150% and the CT ratio is 400/5, the plug setting multiplier will be

Last Answer : If the fault current is 6000 A, the relay plug setting is 150% and the CT ratio is 400/5, the plug setting multiplier will be 10

The boundary of the protective zone is determined by the (A) Location of CT (B) sensitivity of relay used (C) Location of PT (D) None of these

Description : The boundary of the protective zone is determined by the (A) Location of CT (B) sensitivity of relay used (C) Location of PT (D) None of these

Last Answer : Ans: B The boundary of the protective zone is determined by the sensitivity of relay used. If the relay is more sensitive, the protective zone will be increased.

State four functions of protective system.

Description : State four functions of protective system.

Last Answer : Functions of Protective System:  1) To switch ON or OFF the electric power during normal conditions for operation and maintenance.  2) To protect the power system by isolating the faulty ... major faults.  7) To ensure maximum safety conditions from generation stage to consumers premises.

Protective relays are devices that detect abnormal conditions in electrical circuits by measuring?

Last Answer : Protective relays are devices that detect abnormal conditions in electrical circuits by measuring constantly the electrical quantities which differ during normal and abnormal conditions.

An efficient and a well designed protective relaying should have?

Last Answer : An efficient and a well designed protective relaying should have good selectivity and reliability, economy and simplicity, high speed and selectivity.

How can we use CT and PT for protection purpose?

Description : How can we use CT and PT for protection purpose?

Last Answer : CT and PT for Protection purpose: Current transformer (CT) and Potential transformer (PT) are instrument transformers, which are used in conjunction with protective relays for protection purpose. The CT ... from the healthy part. In this way the CT and PT can be used for protection purpose.

Difference between Current Transformer (CT) and Potential Transformer (PT)

Description : Difference between Current Transformer (CT) and Potential Transformer (PT)

Last Answer : Current Transformers (CT) and Potential Transformers (PT) are used to measure the current and voltage in a circuit of the order of hundreds of amperes and volts respectively. A CT has large number of ... and flux density vary over a wide range whereas in PT, they vary over a limited range only

Explain over-current protection of transformer.

Description : Explain over-current protection of transformer.

Last Answer : Over-Current Protection of Transformer: Simple over-current & earth fault protection of transformer against external shortcircuit and excessive overloads is shown in the above figure. The ... trip command to the circuit breaker and the transformer is disconnected from load or fault.

The inrush current of a transformer at no load is maximum if the supply voltage is switched on

Description : The inrush current of a transformer at no load is maximum if the supply voltage is switched on  (1) at peak voltage value (2) at zero voltage value (3) at half voltage value (4) at 0.866 time voltage value

Last Answer : At 0.866 time voltage value

The inverse definite mean time relays are used for over current and earth fault protection of transformer against?

Last Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.

The harmonic currents in a power transformer does not cause increase in: a) Secondary voltage b) Core loss c) Copper loss d) Magnetic interference with protective relays

Description : The harmonic currents in a power transformer does not cause increase in: a) Secondary voltage b) Core loss c) Copper loss d) Magnetic interference with protective relays

Last Answer : Ans: A

List two limitations of Differential-Protection scheme for transformer.

Description : List two limitations of Differential-Protection scheme for transformer.

Last Answer : Limitations of Differential Protection Scheme of Transformer:  1) Due to the magnetization characteristics of the CTs used, the ratio errors change with respect to the circulating currents.  2) ... & improper operation.  5) Inrush of magnetizing current may lead to inadvertent operation.

Write down limitation of differential protection of transformer.

Description : Write down limitation of differential protection of transformer.

Last Answer : Limitations of differential protection of transformer: 1) Due to the magnetization characteristics of the CTs used, the ratio errors change with respect to the circulating currents. 2) The pilot wires ... current (higher imbalance) due to which accuracy of sensing & operation is decreased. 

Which of the following is not a part of transformer installation?

Description : Which of the following is not a part of transformer installation?  (A) Conservator (B) Breather (C) Buchholz Relay (D) Exciter

Last Answer : Which of the following is not a part of transformer installation?  (A) Conservator (B) Breather (C) Buchholz Relay (D) Exciter

The core construction is like spokes of a wheel in following transformer:

Description : The core construction is like spokes of a wheel in following transformer:  (A) Berry Type Transformer (B) Core Type Transformer (C) Shell Type Transformer (D) None of the above

Last Answer : The core construction is like spokes of a wheel in following transformer:  Berry Type Transformer

IDMT relays are used to protect the transformer against :

Description : IDMT relays are used to protect the transformer against :  (A) Internal short -circuits (B) Open circuits (C) External short circuits (D) Oil leakage

Last Answer : IDMT relays are used to protect the transformer against : External short circuits

To prevent mal-operation of differentially connected relay while energizing a transformer, the relay

Description : To prevent mal-operation of differentially connected relay while energizing a transformer, the relay restraining coil is based with  (1) second harmonic current  (2) third harmonic current  (3) fifth harmonic current  (4) seventh harmonic current

Last Answer : To prevent mal-operation of differentially connected relay while energizing a transformer, the relay restraining coil is based with  second harmonic current 

To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ?

Description : To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ?

Last Answer : To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ? Δ-Δ connection

The short circuit in any winding of the transformer is the result of?

Last Answer : The short circuit in any winding of the transformer is the result of impulse voltage.

What is the use of Buchholz relay in transformer?

Description : What is the use of Buchholz relay in transformer?

Last Answer : This is a transformer that is used to step up and down current. 

A commutator's protective oxide film can be destroyed by _________________. A. periods of low humidity B. very low brush current density C. improper brush grade D. all of the above

Description : A commutator's protective oxide film can be destroyed by _________________. A. periods of low humidity B. very low brush current density C. improper brush grade D. all of the above

Last Answer : Answer: D

Protective relays are devices that detect abnormal conditions in electrical circuits by measuring (a) current during abnormal condition (b) voltage during abnormal condition (c) constantly the electrical quantities which differ during normal and abnormal conditions (d) none of the above

Description : Protective relays are devices that detect abnormal conditions in electrical circuits by measuring (a) current during abnormal condition (b) voltage during abnormal condition (c) constantly the electrical quantities which differ during normal and abnormal conditions (d) none of the above

Last Answer : (c) constantly the electrical quantities which differ during normal and abnormal conditions

of what use are current and voltage transformers in protective systems

Last Answer : Current transformers (CT) : Current transformer (CT) actually step down the high current to low current for the operation of relays. Current transformer is use for measurement of ... use for relay. This is about potential transformer.

What are the errors of the following CT’ s 5p. 10p. 15p. At rated current?

Description : What are the errors of the following CT’ s 5p. 10p. 15p. At rated current?  

Last Answer : 5p - 1 % Ratio error ± 60 min phase error 10p - 3 % Ratio error ± 60 min phase error 15p - 5 % Ratio error ± 60 min phase error 

If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400:5, the plug setting multiplier will be

Description : If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400:5, the plug setting multiplier will be

Last Answer : If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400:5, the plug setting multiplier will be 10 A

The current coil of a wattmeter is connected to the CT of R-phase....

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Last Answer : The current coil of a wattmeter is connected to the CT of R-phase. The potential coil is connected across Y and B phases. The wattmeter measures Reactive power of R phase.

When the truth becomes not "power", as the saying goes, but a burden, what do you do?

Description : When the truth becomes not "power", as the saying goes, but a burden, what do you do?

Last Answer : You denounce it as “fake news”.

Who performs Chemical Body Burden Testing for human toxins?

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Do you have a burden that you just can't seem to put down?

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Last Answer : answer:Hmmm, I think it always helps to at least write down your feelings, even if your the only one to read it it allows you to express yourself and feelings more fully because you are forced to ... about it all the time. Even knowing that others sympathize with you can help you not feel so alone.

Is being more "aware/educated" a blessing or a burden?

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Jinx: Where does the burden of proof lie?

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Would you give a dog or cat away because it has become a financial burden?

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Last Answer : answer:Never. If I were Queen of the world (strangely, no one has nominated me), I would license people to own animals. One thing they would sign is a financial responsibility document. ... for irresponsibility. Genuine hardship is a different situation, but usually that is not what is involved.

If a man carried my burden He would break his back. I am not rich, but leave silver in my track.What am I? -Riddles

Description : If a man carried my burden He would break his back. I am not rich, but leave silver in my track.What am I? -Riddles

Last Answer : A snail.

If a man carried my burden he would break his back. I am not big but leave silver in my tracks. What am I? -Riddles

Description : If a man carried my burden he would break his back. I am not big but leave silver in my tracks. What am I? -Riddles

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If a man carried my burden He would break his back. I am not rich, But leave silver in my track. -Riddles

Description : If a man carried my burden He would break his back. I am not rich, But leave silver in my track. -Riddles

Last Answer : I am a Snail.

The Home Rule Leagues (1916-17) carried the burden of nationalist propaganda during the First World War. -SST 10th

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The concept of the white mans burden was used to justify American imperialism. The concept argued that native people in foreign lands like the Philippines?

Description : The concept of the white mans burden was used to justify American imperialism. The concept argued that native people in foreign lands like the Philippines?

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Last Answer : burdun Meaning.

What is the burden ?

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What organizations began as six neighboring countries that wanted to lessen their burden of import taxes?

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How has the use of camel as beast of burden been affected by jeeps?

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What cause president Van Burden to refuse the offer to Texas to become part of the US in 1837?

Description : What cause president Van Burden to refuse the offer to Texas to become part of the US in 1837?

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Which best describes the white man's burden?

Description : Which best describes the white man's burden?

Last Answer : help civilized nonwhites-apex