Please Log in or Register for more.

D.C. shunt relays are made of?

2.7k views

1 Answer

Answer :

D.C. shunt relays are made of many turns of thin wire.

Like 0 like

Please log in or register to answer this question.

Related Questions


List the main parts of D.C. motor
Last Answer : Main parts of D.C. motor and their functions:  Part Functions Yoke i) Provides mechanical support for poles. ii) Acts as protecting cover for machine. iii) Carries magnetic flux. ... a fixed physical position relative to the stator.  Shaft Used to transfer mechanical power 

Show More

149 views 1 answer







Write two applications of D.C. series motor. 
Last Answer : The applications of D.C. series motor: 1. Cranes 2. Hoists 3. Trolley and cars 4. Conveyors 5. For traction work i.e. electric locomotives 6. Elevator 7. Air compressor

Show More

117 views 1 answer







State the principle of operation of d.c. motor.
Last Answer : When a current carrying conductor is placed in a magnetic field, the conductor experiences the force. The magnitude of force is given by F = BIL newton  where F – Force   B – maximum flux density   I – Current   L – Length of conductor

Show More

142 views 1 answer













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

Show More

3.1k views 1 answer








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

Show More

2.6k views 1 answer








Last Answer : The single phasing relays are used for the protection of three phase motors.

Show More

296 views 1 answer








Last Answer : Impedance relays are used for phase faults on long line.

Show More

82 views 1 answer








Last Answer : Discrimination between main and back up protection is provided by the use of relays which are slow.

Show More

396 views 1 answer








Last Answer : To protect most of the electrical equipment handling low power, the types of relays used are thermocouple, electronic and bimetallic.

Show More

106 views 1 answer








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.

Show More

132 views 1 answer








Last Answer : Directional relays are based on flow of power.

Show More

165 views 1 answer








Last Answer : Thermal overload relays are used to protect the motor against overcurrent due to heavy loads.

Show More

252 views 1 answer








Last Answer : Overload relays are of induction, solid state, thermal, electromagnetic type.

Show More

72 views 1 answer








Last Answer : Relays can be designed to respond to changes in resistance, reactance or impedance voltage and current, light intensity, temperature.

Show More

145 views 1 answer








Last Answer : Shunt capacitance is neglected while considering short transmission line.

Show More

114 views 1 answer







How many types of types of relays are there?

Show More

50 views 0 answers







Consider the following statements. Which of these statements are correct ?  (1) Reactance relays are preferred for ground fault relaying  (2) Impedance relays are most suitable for:protecting long transmission lines  (3) Mho relays are best ... (1) and (3) (C) (2) and (4) (D) (1), (2) and (4)
Last Answer : Consider the following statements. Which of these statements are correct ?  (1) Reactance relays are preferred for ground fault relaying  (2) Impedance relays are most suitable for:protecting long transmission lines  (3) Mho relays are ... (1) and (3) (C) (2) and (4) (D) (1), (2) and (4)

Show More

129 views 1 answer







A 4-pole, dc shunt motor working on 250V takes a current of 2A when running at no load on 1000 rpm. Calculate its back emf and speed at load if the motor takes 51A. Armature and shunt field resistance are 0.2Ω and 250Ω respectively

Show More

14 views 0 answers







Describe the operation of shunt capacitor filter with the help of circuit diagram and waveforms.

Show More

46 views 0 answers







Describe the operation of shunt capacitor filter with the help of circuit diagram and waveforms.

Show More

5 views 0 answers







DC shunt motor
Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

Show More

140 views 2 answers







If field current is decreased in shunt dc motor, the speed of the motor (a) remains same. (b) increases. (c) decreases. (d) none of the above.
Last Answer : increases

Show More

2.8k views 4 answers







State any four applications of DC shunt motor.
Last Answer : Applications of DC shunt motor: 1) Lathe machines 2) drilling machines 3) milling machines 4) Printing machinery 5) Paper industry 6) centrifugal and reciprocating pumps 7) blowers 8)fans

Show More

115 views 2 answers







66 views 0 answers







Why does the speed of a DC shunt motor decrease as the load increases?
Last Answer : Because if the load is increasing then the torque must also be increase. If not then the speed of motor will decrease.

Show More

2.7k views 1 answer







State the use of shunt and series resistance used in extension of meter.
Last Answer : Use of shunt and series resistance: i) Use of shunt: To extend the range of Ammeter. ii) Use of series resistance: To extend the range of Voltmeter.

Show More

88 views 1 answer







In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line
Last Answer : In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line

Show More

520 views 1 answer







A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be
Last Answer : A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be 474 V

Show More

481 views 1 answer







Shunt compensation in an EHV line is used to (A) Improve stability. (B) Improve the voltage profile. (C) Reduce the fault level. (D) Substitute for synchronous phase modifier.
Last Answer : Shunt compensation in an EHV line is used to Improve the voltage profile.

Show More

5.3k views 1 answer







A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is
Last Answer : A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is 36 Ohm

Show More

329 views 1 answer







A shunt fault is characterized by (A) Increase in current, frequency and pf (B) Increase in current, reduction in frequency and pf (C) Increase in current and frequency, reduction in pf (D) Decrease in current and frequency
Last Answer : B

Show More

1.0k views 2 answers








Last Answer : The function of shunt in an ammeter is to by pass the current.

Show More

462 views 1 answer







A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave?
Last Answer : A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will be of 5 Hz.

Show More

177 views 1 answer








Last Answer : A cumulatively compounded long shunt generator when operating as a motor would be differentially compounded long shunt.

Show More

111 views 1 answer







The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be?
Last Answer : The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be 580 V.

Show More

668 views 1 answer







In a shunt generator the voltage build up is generally restricted by?

Show More

145 views 0 answers







A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly?
Last Answer : 200V/E2 = 1000/1200 E2= 240 V

Show More

1.8k views 2 answers








Last Answer : If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens this will make armature to take heavy current, possibly burning it.

Show More

158 views 1 answer








Last Answer : The purpose of retardation test on D.C. shunt machines is to find out stray losses.

Show More

74 views 1 answer








Last Answer : In a manual shunt motor starter over load relay is connected in series and no volt relay in parallel with the load.

Show More

76 views 1 answer








Last Answer : D.C. shunt motors are used for driving machine tools.

Show More

85 views 1 answer








Last Answer : If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will increase.

Show More

201 views 1 answer








Last Answer : For a D.C. shunt motor if the excitation is changed torque will change but power will remain constant.

Show More

168 views 1 answer








Last Answer : The speed of a D.C. shunt motor can be increased by increasing the resistance in field circuit.

Show More

134 views 1 answer








Last Answer : The armature torque of the D.C. shunt motor is proportional to armature current.

Show More

210 views 1 answer








Last Answer : As the load is increased the speed of D.C. shunt motor will reduce slightly.

Show More

142 views 1 answer








Last Answer : The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is 0.5.

Show More

324 views 1 answer








Last Answer : In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be more than full-load current.

Show More

366 views 1 answer








Last Answer : In case of D.C. shunt motors the speed is dependent on back e.m.f. only because flux is practically constant in D:C. shunt motors.

Show More

250 views 1 answer






Show More⇦ PreviousNext ⇨