95 views
what are the uses of current transformer ?

1 Answer

Answer :

Uses of current transformer are as follows :

A current transformer is use to measure Alternating current.

A current transformer is used in meters.

A current transformer is used in ammeters.

Current transformer is use with compensator.

Current transformer is use in power factor meters.

Current transformer is use in watthour meters.

Current transformer is use with relay.

Current transformer is use with circuit breaker.

Current transformer is use for overcurrent fault protection.

Like 0 like

Please log in or register to answer this question.

Related questions

163 views

Description : The core of a transformer (medium size) uses to provide high flux densities (a) diamagnetic (c) ferromagnetic core (b) paramagnetic (d) none of these

Last Answer : The core of transformer is made up colled rolled grain oriented. It is a ferromagnetic material..

2 answers
160 views

Description : With the help of neat diagram, explain the construction of current transformer. 

Last Answer : Construction of current transformer:   C.T. has bar type conductor, which behaves as primary winding. The primary of C.T. carries large current Ip which is to be measured, so the bar ... sectional area is small. An ammeter of small range is connected across the secondary as shown in figure. 

1 answer
111 views

Description : For a traction transformer circuit breaker state: 1) Rated current and rupturing capacity 2) Any two tests it should be capable of withstanding 3) Overall tripping time and relay time.

Last Answer : Ans: 1) Rated current --- 750 A and Rupturing capacity --- 500 MVA  2) Any two tests it should be capable of withstanding --- Breaking test , Reclosing test , Endurance test ( any two )  3) Overall tripping time --- 0.14 sec and Relay time --- 0.04 sec 

1 answer
153 views

Description : A single phase 230 V/ 150 V , 1 kVA, 50 Hz transformer is supplied by 230 V AC supply. Find the full load primary and secondary current. 

0 answers
130 views

Description : Step-down transformer converts high voltage and low current into:  (A) How voltage and high current (B) High voltage and low current (C) Low voltage and high current (D) None of the above

Last Answer : Step-down transformer converts high voltage and low current into: Low voltage and high current

1 answer
213 views

Description : The kVA rating of Three-phase transformer with Voltage = 200V and Current = 100A will be :  (A) 34.64 kVA (B) 75 kVA (C) 20 kVA (D) None of the above

Last Answer : The kVA rating of Three-phase transformer with Voltage = 200V and Current = 100A will be : 34.64 kVA

1 answer
102 views

Description : A transformer at 25 Hz develops 20 W hysteresis loss and 50 W eddy current loss. If the applied voltage and frequency are doubled, the new core losses are (A) 140 W (B) 180 W (C) 240 W (D) 480 W

Last Answer : A transformer at 25 Hz develops 20 W hysteresis loss and 50 W eddy current loss. If the applied voltage and frequency are doubled, the new core losses are 240 W

1 answer
217 views

Description : Eddy current losses in transformer cores can be reduced by the use of  1. Solid cores  2. Laminated cores  3. Ferrites  Select the correct answer using the codes given below : (a) 2 and 3 only (b). 1 and 2 only (c) 1 and 3 only (d) 1, 2 and 3

Last Answer : Eddy current losses in transformer cores can be reduced by the use of  1. Solid cores  2. Laminated cores  3. Ferrites  Select the correct answer using the codes given below : (a) 2 and 3 only (b). 1 and 2 only (c) 1 and 3 only (d) 1, 2 and 3

1 answer
135 views

Description : The kVA rating required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV will be: A. 4 kVA B. 0.25 kVA C. 16 kVA D. 8 kVA

Last Answer : The kVA rating required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV will be: 16 kVA

1 answer
128 views

Description : In case of a power transformer, the no load current in terms of rated current is (1) 10-20% (2) 15-30% (3) 2-6% (4) 30-50% 

0 answers
123 views

Description : The ratio error in current transformer is due to:  (1) Power factor of primary. (2) Wattless component of the current in the primary (3) Exciting current (4) Leakage flux

Last Answer : The ratio error in current transformer is due to: Exciting current.

1 answer
183 views

Description : A large transformer operating at no load draws an exciting current Io of 5A, when the primary is connected to a 120 V, 60 Hz source. From a wattmeter test, it is known that iron losses are equal to 180 W. Calculate ... power absorbed by the core.  (A) 600 var (B) 572 var (C) 180 var (D) 360 var 

Last Answer : 572var

1 answer
126 views

Description : How eddy current is produced in a transformer?

0 answers
7 views

Description : Which of the listed transformer uses a single winding to produce voltage transformation? A. Stepup transformers B. Stepdown transformers C. Autotransformers D. Isolation transformers

Last Answer : Answer: C

1 answer
6 views

Description : Most mobile satellite array uses ___________ in transforming 50 to 150 Ω impedance. A. stub B. balun C. quarter-wavelength transformer D. microstrip tapers.

Last Answer : C. quarter-wavelength transformer

1 answer
4 views

Description : What are the typical uses of auto transformer ?

Last Answer : i) As a booster to compensate the voltage drop for better regulation ii)As induction motor starters. iii) In locomotive iv) As furnace transformer

1 answer
1.7k views

Description : a single phase full wave midpoint thyristor converter uses a 230/200V transformer with centre tap on the secondary side. The P.I.V per thyristor is   (A) 100V (B)141.4V (C)200V (D)282.8V

Last Answer : d

2 answers
...