write short notes on single phase system.

109 views
write short notes on single phase system.
by

1 Answer

Answer :

A "phase" in an electrical system is often referred to as the waveform (may be voltage or the current) of the power supply.

The waveform in an AC system is typically bipolar symmetrical sine wave and it varies periodically with time.

In a single phase AC system ,there are two conductors. One of the conductor is the supply (often called  as the "Live" or "Phase" ) and another conductor is a return path (called as "Neutral"). The operating voltage and frequency of the AC system may be 230V,50 Hz or 110V,60 HZ respectively  (depending on the region)
 
Single phase supply is generally used for domestic household or commercial supplies and street lighting. Industrial  supplies requires three phase electrical supply .
Like 0 like
by

Please log in or register to answer this question.

Related questions

761 views
A single core cable is designed to work for a single phase system with a peak voltage of 220 kV. The maximum

Description : A single core cable is designed to work for a single phase system with a peak voltage of 220 kV. The maximum permissible stress in the dielectric is not to exceed 20 kV/mm. For economical size, the overall core diameter of the cable is (A) 28.2 mm (B) 26.4 mm (C) 24.4 mm (D) 22.0 mm

Last Answer : A single core cable is designed to work for a single phase system with a peak voltage of 220 kV. The maximum permissible stress in the dielectric is not to exceed 20 kV/mm. For economical size, the overall core diameter of the cable is 22.0 mm

1 answer
120 views
Write short notes on 3 phase AC system.

Description : Write short notes on 3 phase AC system.

0 answers
117 views
Explain the procedure to perform Short Circuit test on single phase transformer with circuit diagram.

Description : Explain the procedure to perform Short Circuit test on single phase transformer with circuit diagram.

0 answers
598 views
Explain MCB and ELCB with connection diagram supplying single phase load.

Description : Explain MCB and ELCB with connection diagram supplying single phase load. 

Last Answer : OR OR Explanation: * MCB provides short circuit protection. * MCB provides overload protection * ELCB provides earth fault protection. * MCB is in series with ... occurs, the ELCB cuts off the power within the time of 0.1 sec. automatically to protect the personnel. 

1 answer
281 views
Why is a capacitor used in a single phase motor and not in three phase motor ?

Description : Why is a capacitor used in a single phase motor and not in three phase motor ?

Last Answer : In 1-phase induction motor capacitor work is generate the auxiliary winding current than excite the main winding to rotor starts rotate. After rotor start rotating about 75% of their speed than auxiliary ... emf to start the motor.so,in 3-phase induction motor is self start induction motor.

6 answers
188 views
working principle of single phase motor

Description : working principle of single phase motor

Last Answer : The Stator of single phase induction motor houses two windings  1. Main (Running) winding 2. Auxiliary (Starting ) winding Rotor of single phase induction motor is ... with starting winding or a capacitor may be permanently connected in series with Auxiliary (Starting ) winding.

1 answer
452 views
Explain the working of a single phase capacitor start induction motor.

Description : Explain the working of a single phase capacitor start induction motor. 

Last Answer : Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc

2 answers
135 views
What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is

Description : What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is rotating at speed of 1140 rpm? A) 60% B) 5% C) 10% D) None of these

Last Answer : What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is rotating at speed of 1140 rpm? A) 60% B) 5% C) 10% D) None of these

1 answer
213 views
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016

Description : What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

Last Answer : What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

1 answer
25 views
SINGLE PHASE INDUCTION MOTORS MCQ

Description : SINGLE PHASE INDUCTION MOTORS MCQ

Last Answer : 101. After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on (a) running winding (b) rotor winding (c) field winding (d) compensating winding Ans: a ... motor is usually reduced by using (a) gearing (b) belts (c) brakes (d) chains Ans: a

3 answers
558 views
Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it.

Description : Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it. 

Last Answer : Circuit Diagram: Waveforms:

1 answer
263 views
Single phase transformer

Description : Single phase transformer

Last Answer : Single phase Transformer Transformer

1 answer
101 views
State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders

Description : State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders

Last Answer : Application Suitable Single Phase Motor Table Fan 1) Capacitor split phase motor 2) Capacitor start capacitor run motor Mixers and Grinders 1) Universal motor 2) A.C. Series motor

1 answer
1.2k views
Explain construction and working principle of single phase transformer.

Description : Explain construction and working principle of single phase transformer.

Last Answer : A single phase transformers is an electrical device that accepts single-phase AC power and outputs single-phase AC. PRINCIPLE... The single-phase transformer works on the principle of ... and secondary windings. Thin steel laminations shall be employed to prevent power losses from the core.

4 answers
955 views
Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.

Description : Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.

Last Answer : Single phase fully control bridge converter with RL load: 1. During positive half cycle of input voltage, T1 and T2 are forward biased and during negative half cycle, T3 and T4 are forward biased. Therefore, T1-T2 ... cycle till the firing of next pair of SCRs as shown in the waveform.

1 answer
2.9k views
State advantages of three phase over single phase.

Description : State advantages of three phase over single phase.

Last Answer : Advantages of 3-phase system over 1-phase system: -  1. More output: For the same size, output of poly-phase machines is always higher than single phase machines.  2. Smaller size: For ... are self- starting: The three phase ac motors are self starting, while single phase induction motor are not.

4 answers
380 views
A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage

Description : A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he

Last Answer : A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he 0.52

1 answer
229 views
The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is

Description : The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is (A) 1.2 kW (B) 1 kW (C) 600 W (D) 500 W

Last Answer : The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is 500 W

1 answer
325 views
The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is

Description : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is (A) 11% (B) 9% (C) 1.1% (D) 3%

Last Answer : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is 11%

1 answer
300 views
The power factor of a single phase load can be calculated if the instruments available are?

Last Answer : The power factor of a single phase load can be calculated if the instruments available are three ammeters or three voltmeters.

2 answers
372 views
In a single phase power factor meter the phase difference between the currents in the two pressure coils is?

Last Answer : In a single phase power factor meter the phase difference between the currents in the two pressure coils is exactly 90°.

1 answer
167 views
The two pressure coils of a single phase power factor meter have?

Last Answer : The two pressure coils of a single phase power factor meter have the same dimensions and the same number of turns.

1 answer
489 views
Induction type single phase energy meters measure electric energy in?

Last Answer : Induction type single phase energy meters measure electric energy in kWh.

1 answer
172 views
If a single phase induction motor runs slower than normal, the most likely defect is?

Last Answer : If a single phase induction motor runs slower than normal, the most likely defect is worn bearings.

1 answer
217 views
Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a?

Last Answer : Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a magnetic relay.

1 answer
130 views
Single phase induction motor usually operates on?

Last Answer : Single phase induction motor usually operates on 0.6 power factor lagging.

1 answer
244 views
A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by...

Description : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will?

Last Answer : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will not start at all.

1 answer
117 views
The running winding of a single phase motor on testing with meggar is found to be ground...

Description : The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?

Last Answer : The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the slot edge where coil enters or comes out of the slot.

1 answer
277 views
In a single phase motor the centrifugal switch?

Last Answer : In a single phase motor the centrifugal switch disconnects auxiliary winding of the motor.

1 answer
201 views
For the parallel operation of single phase transformers it is necessary that they should have?

Last Answer : Necessary conditions required to be satisfied in order to ensure successful parallel operation of single phase transformers:  1. Only transformers having the same phase displacement between primary and secondary ... . 7. The phase sequence must be followed strictly on HV and LV side connection.

2 answers
170 views
An unexcited single phase synchronous motor is ?

Description : An unexcited single phase synchronous motor is ?

Last Answer : An unexcited single-phase synchronous motor is reluctance motor.

1 answer
128 views
How does a single phase induction motor work?

Description : How does a single phase induction motor work?

Last Answer : As we know that single phase induction is not self started because for self started we require atleast two revolving field but single phase induction motor has only one. So we provide extra ... 1phase IM classified as split phase IM, capacitor start capacitor run, capacitor start induction run.

1 answer
79 views
What are the five types of single phase motors used in the industry?

Description : What are the five types of single phase motors used in the industry?

0 answers
82 views
Explain power in single phase AC circuit.

Description : Explain power in single phase AC circuit.

0 answers
72 views
Describe the gate circuit for a single phase full converter.

Description : Describe the gate circuit for a single phase full converter.

0 answers
525 views
three phase to single phase cycloconverter

Description : three phase to single phase cycloconverter

Last Answer : three phase to single phase cycloconverter

1 answer
123 views
single phase full converter

Description : single phase full converter

Last Answer : single phase full converter

1 answer
194 views
explain the working of single phase induction motor.

Description : explain the working of single phase induction motor.

Last Answer : Stator has two winding namely main winding and auxiliary winding.when single phase ac supply is given to the motor,its produces alternating field.this field cut by a cage rotor.so some emf ... due to this emf,rotor flux produced.the interaction between two fluxes produce torque.so rotor rotates.

1 answer
540 views
Single Phase Induction Motor

Description : Single Phase Induction Motor

Last Answer : Single Phase Induction Motor Single phase induction motor is mostly used in home, office, shop and many single phase appliances like pumps,  ... torque and silent operation. It is uses where silent operation is required.

1 answer
120 views
Write short notes on diode.

Description : Write short notes on diode.

Last Answer : Diode is made from semiconductor material like silicon or germanium. Diode may use as rectifier which convert AC to DC. It is a electronic component. It is two terminal device, one is anode and second is ... in one direction. Diode is made from P-type and N-type material. Diode have a PN junction.

1 answer
114 views
In a single bus-bar system there will be complete shut down when?

Last Answer : In a single bus-bar system there will be complete shut down when fault occurs on the bus itself.

1 answer
146 views
When a V-V three phase transformer system is converted into a Δ-Δ system, increase in capacity of the system is

Description : When a V-V three phase transformer system is converted into a Δ-Δ system, increase in capacity of the system is (A) 86.6% (B) 50% (C) 57.7% (D) 73.2%

Last Answer : When a V-V three phase transformer system is converted into a Δ-Δ system, increase in capacity of the system is 73.2%

1 answer
254 views
Write short notes on Arduino.

Description : Write short notes on Arduino.

Last Answer : Arduino: Arduino is a open source hardware and software. Arduino is a microcontroller. Since Arduino is open source it have many manufacturer. Arduino project was started in about year 2005 ... many sensors to the Arduino. Arduino board have microprocessor, crystal oscillator, 5V voltage regulator.

1 answer
425 views
Write short notes on: 1) Phosphor characteristics 2) Liquid crystal display

Description : Write short notes on:  1) Phosphor characteristics  2) Liquid crystal display

0 answers
1.3k views
write short notes on BH curve.

Description : write short notes on BH curve.

Last Answer : The B-H curve is the relation between Flux density B in Wb/m2 (on Y Axis) and H in AT/m (on X axis) It is also known as magnetization characteristics. This curve particularly useful ... occurs. At point A' material gets magnetically saturated and the curve becomes flat (parallel to X axis) 

3 answers
145 views
write short notes on Low-pass filter.

Description : write short notes on Low-pass filter.

Last Answer : low-pass filter (1) filter exhibiting frequency selective characteristic that allows low-frequency components of an input signal to pass from filter input to output unattenuated all high-frequency components are ... the bandwidth of the filter. A filter whose impulse response is a low-pass signal.

2 answers
74 views
write short notes on Linear motor.

Description : write short notes on Linear motor.

Last Answer : Normal electrical motor produces rotatory motion same the linear motor produces linear motion. Linear motors have low efficiency. Linear motor can directly produce straight line motion linear motor do not required gears or crank shaft to produce linear motion.

1 answer
4 views
Soil as a three phase system

Description : Is it possible for a soil to consist only of one phase?

0 answers
...