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Three point starter can be used for?
asked
Mar 20, 2018
by
anonymous
three
point
starter
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1
Answer
answered
Mar 20, 2018
by
anonymous
Three point starter can be used for
both shunt and compound motor.
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Related questions
asked
Mar 20, 2018
by
anonymous
A three point starter is considered suitable for?
Last answer:
A three point starter is considered suitable for shunt as well as compound motors.
three
point
starter
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1
answer
asked
Nov 30, 2017
by
anonymous
what is the difference between four point starter and three point starter?
what is the difference between four point starter and three point starter?
Last answer:
The only difference is in the NO VOLT COIL connection in the starter, in three point starter NVC is connected to the field whereas in four point starter it is connected separately. The advantage of using ... (for above rated speed) and lead to DEENERGISE the NVC leading to turning off of the motor.
four
point
starter
three
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87
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1
answer
asked
Mar 20, 2018
by
anonymous
A direct online starter is used for starting motors?
Last answer:
A direct online starter is used for starting motors up to 5 H.P.
direct
online
starter
starting
motors
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59
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1
answer
asked
Mar 20, 2018
by
anonymous
For starting a D.C. motor a starter is required because?
Last answer:
For starting a D.C. motor a starter is required because it limits the starting current to a safe value.
starting
dc
motor
starter
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62
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1
answer
asked
Mar 15, 2018
by
anonymous
What is an auto transformer starter?
What is an auto transformer starter?
auto
transformer
starter
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48
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0
answers
asked
Mar 15, 2018
by
anonymous
Which type of starter is used to start the DC motor?
Which type of starter is used to start the DC motor?
type
starter
used
start
dc
motor
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0
answers
asked
May 8, 2018
by
anonymous
If the % reactance upto the fault point is 20%, then the short circuit current will be
If the % reactance upto the fault point is 20%, then the short circuit current will be
Last answer:
If the % reactance upto the fault point is 20%, then the short circuit current will be 5 times the full load current
reactance
fault
point
short
circuit
current
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1
answer
asked
May 22, 2020
by
anonymous
Explain the necessity of starter for D.C. motor. State various types of D.C. motor starter.
Explain the necessity of starter for D.C. motor. State various types of D.C. motor starter.
Last answer:
Necessity of Starter for D.C. Motor: Armature current is given by equation Ia = (V−Eb)/Ra i) If the motor is at standstill or rest, back emf Eb is zero (as Eb= ZNP/(60A), at start speed N ... . Types of D.C. motor starters: i) Two point starter ii)Three point starter iii) Four point starter
starter
dc
motor
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1
answer
asked
Mar 15, 2018
by
anonymous
Why starter is required for starting an induction motor?
Why starter is required for starting an induction motor?
starter
starting
induction
motor
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93
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0
answers
asked
Jul 30, 2019
by
anonymous
Draw the wiring diagram of fluorescent tube. Explain the working of choke and starter.
Draw the wiring diagram of fluorescent tube. Explain the working of choke and starter.
Last answer:
Fluorescent lamp:- Operation:- When switch is ON current flows through the choke-filament no1- starter-filament no. 2- to neutral, At that time choke induces high voltage which is applied to ... at the time of starting. ii) Starter: To make and break the circuit to start the tube.
wiring
diagram
fluorescent
tube
choke
starter
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2.5k
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1
answer
asked
Sep 23, 2018
by
anonymous
State any four advantages of soft starter.
State any four advantages of soft starter.
Last answer:
Advantages of soft starter: 1. Very low line voltage drops on motor operation 2. Reduced energy losses in the lines 3. System efficiency increases 4. Very smooth starting & operation 5. As ... may lead to lower MD billing. 13. Less mechanical maintenance. 14. Saving in operating costs.
advantages
soft
starter
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106
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1
answer
asked
Sep 18, 2018
by
anonymous
State function of starter and ELCB. (Earth Leakage Circuit Breaker)
State function of starter and ELCB. (Earth Leakage Circuit Breaker)
Last answer:
i) Function of Starter:- 1. To prevent the high starting current OR to minimize the starting current. 2. To give supply failure protection 3. To give over load and short circuit protection ... an installation and cut off the circuit from power supply and avoid electrical shock to the person.
function
starter
elcb
earth
leakage
circuit
breaker
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370
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1
answer
asked
Mar 20, 2018
by
anonymous
In a manual shunt motor starter?
Last answer:
In a manual shunt motor starter over load relay is connected in series and no volt relay in parallel with the load.
manual
shunt
motor
starter
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46
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1
answer
asked
Mar 10, 2018
by
anonymous
What is the best Arduino starter kit?
What is the best Arduino starter kit?
arduino
starter
kit
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60
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0
answers
asked
Apr 29, 2018
by
anonymous
The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is
The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is
Last answer:
The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is 4 percent
slip
three
phase
4
-pole
induction
motor
rotating
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166
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1
answer
asked
Mar 17, 2018
by
anonymous
How is a three phase cage induction motor self starting?
How is a three phase cage induction motor self starting?
Last answer:
Any type of induction motor is self starting. Because the reason for torqe production require two flux displaced by some angle theta.If theta is constant with time then torqe will be constant;if ... torqe also pulsating. In induction motor this angle theta is not pulsating.so it is self starting
three
phase
cage
induction
motor
self
starting
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95
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1
answer
asked
Mar 3, 2018
by
anonymous
What is mean by plugging in three phase induction motor?
What is mean by plugging in three phase induction motor?
Last answer:
Plugging in three-phase induction motor means interchanging of any two phases of a stator for quick stopping.
plugging
three
phase
induction
motor
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127
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1
answer
asked
May 7, 2020
by
anonymous
Single point Cutting tool signature
Single point Cutting tool signature
Last answer:
The shape of a tool is specified in a special sequence and this special sequence is called tool signature. The tool signature is given below (i) Back rake angle (ii) Side rake angle (iii) ... rake, end relief, side relief, end cutting edge, side cutting edge angle and 0.8 mm nose radius.
single
point
cutting
tool
signature
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33
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1
answer
asked
May 3, 2020
by
anonymous
Illustrate with neat wiring diagram a single lamp control by two point method.
Illustrate with neat wiring diagram a single lamp control by two point method.
Last answer:
Single lamp control by two point method: This system is commonly used for stair case wiring. It consists of two way switches (the switch operates always in one of the two possible positions) the ... the person will change the position of switch S2, so that the lamp will be switched OFF'.
illustrate
with
neat
wiring
diagram
a
single
lamp
control
by
two
point
method
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72
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1
answer
asked
Jul 1, 2019
by
anonymous
A charge of 0.1 C moves past a given point every 0.01 s. How much is the current?
A charge of 0.1 C moves past a given point every 0.01 s. How much is the current?
Last answer:
The current is 10.0A. 1ampere = 1 Coulomb per 1 second. 0.1Coulombs ÷ 0.01seconds = 10.0amperes.
a
charge
of
0
1
c
moves
past
given
point
every
01
s
how
much
is
the
current
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166
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1
answer
asked
May 8, 2018
by
anonymous
The operating point of a protective current transformer is near the
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
operating
point
protective
current
transformer
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84
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1
answer
asked
May 8, 2018
by
anonymous
Blind spot is a point in the zones of protection where
Blind spot is a point in the zones of protection where
Last answer:
Blind spot is a point in the zones of protection where No protection is available.
blind
spot
point
zones
protection
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577
views
1
answer
asked
Mar 20, 2018
by
anonymous
In a load curve the highest point represents?
Last answer:
In a load curve the highest point represents peak demand.
load
curve
highest
point
represents
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78
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1
answer
asked
Mar 14, 2018
by
anonymous
What are three ways you can increase the strength of an electromagnet?
What are three ways you can increase the strength of an electromagnet?
three
ways
increase
strength
electromagnet
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59
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0
answers
asked
Oct 4, 2017
by
anonymous
how can we reverse the direction of rotation of three phase induction motor?
how can we reverse the direction of rotation of three phase induction motor ?
Last answer:
The direction of rotation of three phase induction motor can be reversed by plugging i.e by changing any two out of three phases of the supply to the stator of the Induction motor terminal.
three
phase
induction
motor
rotation
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100
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1
answer
asked
Sep 2, 2019
by
anonymous
Why is a capacitor used in a single phase motor and not in three phase motor ?
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.
capacitor
single
three
phase
motor
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127
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6
answers
asked
May 17, 2018
by
anonymous
A 4-point starter is used to start and control the speed of a
A 4—point starter is used to start and control the speed of a A) DC shunt motor with armature resistance control B) DC shunt motor with field weakening control C) DC series motor D) Thyristor controlled d.c. motor
Last answer:
A 4—point starter is used to start and control the speed of a DC shunt motor with armature resistance control
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171
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1
answer
asked
May 7, 2020
by
anonymous
List different starting methods of three phase synchronous motor. Explain any one of them.
List different starting methods of three phase synchronous motor. Explain any one of them.
Last answer:
Different Starting Methods of Three Phase Synchronous Motor: As synchronous motor is not self starting, different methods of starting are as follows: 1) By using an Induction (Pony) motor 2) ... . The rotor gets pulled into synchronism and starts running at constant speed as a synchronous motor.
list
different
starting
methods
of
three
phase
synchronous
motor
explain
any
one
them
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64
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1
answer
asked
May 3, 2020
by
anonymous
Describe control of a single lamp from three places. Draw the relevant circuit diagram.
Describe control of a single lamp from three places. Draw the relevant circuit diagram.
Last answer:
Single lamp control from three places- It consists of two way switches & intermediate switch, the circuit diagram is as shown in figure. We require two 2-way switches and one intermediate switch and a lamp ... position of any one switch is changed, then the lamp will be turned off.
describe
control
of
a
single
lamp
from
three
places
draw
the
relevant
circuit
diagram
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87
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1
answer
asked
Apr 16, 2020
by
anonymous
Explain with neat circuit diagrams the procedures to perform no load and blocked rotor tests on three phase induction motor
Explain with neat circuit diagrams the procedures to perform no load and blocked rotor tests on three phase induction motor.
no
load
and
blocked
rotor
tests
on
three
phase
induction
motor
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85
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0
answers
asked
Apr 16, 2020
by
anonymous
Explain the need and steps to conduct the reduced voltage running up test on the three phase induction motor.
Explain the need and steps to conduct the reduced voltage running up test on the three phase induction motor.
explain
the
need
and
steps
to
conduct
reduced
voltage
running
up
test
on
three
phase
induction
motor
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57
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0
answers
asked
Aug 18, 2019
by
anonymous
Why is a three phase denoted by R, Y, B ?
Why is a three phase denoted by R, Y, B ?
Last answer:
phase 1 ,R =Red colour cable terminal, phase 2 Y=Yellow colour terminal cable,Phase 3 B=Blue colour cable terminal, N =Neutral. For identification.
three
phase
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170
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2
answers
asked
Jul 30, 2019
by
anonymous
State any four advantages of three phase induction motor.
State any four advantages of three phase induction motor.
Last answer:
Advantages of three phase induction motor https://youtu.be/27OIOCKN05U
three
phase
induction
motor
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100
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2
answers
asked
Jun 29, 2019
by
anonymous
List three important characteristics of an electric circuit.
List three important characteristics of an electric circuit.
list
three
important
characteristics
of
an
electric
circuit
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203
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0
answers
asked
Sep 6, 2018
by
anonymous
Define balanced and unbalanced load in three phase circuit.
Define balanced and unbalanced load in three phase circuit.
Last answer:
Balanced Load: When all the imedances of 3 phases are equal in magnitude and of same nature then load is said to be balanced. Unbalanced Load: When all the imedances of 3 phases are not equal in magnitude and of different nature then load is said to be unbalanced.
balanced
unbalanced
load
three
phase
circuit
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55
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1
answer
asked
Aug 12, 2018
by
anonymous
State any four application of three phase circuit.
State any four applications of three phase circuits.
Last answer:
The application of three phase circuits are 1. Three phase circuit is used for power transmission over long distances. 2. Three phase circuit can produce rotating magnetic field 3. Three phase ... three phase Motors and Transformers. 4. Three phase circuit is used for power converters circuits.
applications
three
phase
circuit
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163
views
1
answer
asked
Aug 11, 2018
by
anonymous
Draw the waveform of three phase AC supply voltage.
Draw the waveform of three phase AC supply voltage.
waveform
three
phase
ac
supply
voltage
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158
views
0
answers
asked
Aug 11, 2018
by
anonymous
State advantages of three phase over single phase.
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.
advantages
three
phase
single
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2.8k
views
4
answers
asked
Apr 29, 2018
by
anonymous
Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch
Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these
Last answer:
Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these
circuit
three
parallel
branches
connected
dc
supply
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167
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1
answer
asked
Apr 29, 2018
by
anonymous
When three resistors with unequal values are connected in parallel, _______
When three resistors with unequal values are connected in parallel, _______ A) The current across the resistors is the same B) The voltage drop across the resistors is the same C) The voltage drops across the resistors is proportional to the resistance of each resistor D) None of these
Last answer:
When three resistors with unequal values are connected in parallel, The voltage drop across the resistors is the same
three
resistors
unequal
values
connected
parallel
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70
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1
answer
asked
Apr 28, 2018
by
anonymous
When a V-V three phase transformer system is converted into a Δ-Δ system, increase in capacity of the system is
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%
three
phase
system
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71
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1
answer
asked
Mar 25, 2018
by
anonymous
In a three-phase supply floating neutral is undesirable because it way give rise to?
In a three-phase supply floating neutral is undesirable because it way give rise to?
Last answer:
In a three-phase supply floating neutral is undesirable because it way give rise to unequal line voltages across the load.
three
phase
supply
floating
neutral
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87
views
1
answer
asked
Mar 18, 2018
by
anonymous
Three phase synchronous motor will have how many sliprings?
Three phase synchronous motor will have how many sliprings?
Last answer:
Three phase synchronous motor will have two sliprings.
three
phase
synchronous
motor
slipring
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66
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1
answer
asked
Mar 11, 2018
by
anonymous
Explain power relations in three phase circuit.
Explain power relations in three phase circuit.
power
relations
three
phase
circuit
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70
views
0
answers
asked
Mar 8, 2018
by
anonymous
Explain three phase half wave controller or three phase unidirectional controller.
Explain three phase half wave controller or three phase unidirectional controller.
Last answer:
Three phase half wave controller or unidirectional controller:
explain
three
phase
half
wave
controller
unidirectional
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175
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1
answer
asked
Mar 7, 2018
by
anonymous
Explain Three Phase Bidirectional Delta Connected Controller.
Explain Three Phase Bidirectional Delta Connected Controller.
Last answer:
Three Phase Bidirectional Delta Connected Controller:
three
phase
bidirectional
delta
connected
controller
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396
views
1
answer
asked
Feb 19, 2018
by
anonymous
Explain three phase bridge inverter.
Explain three phase bridge inverter.
Last answer:
Three phase bridge inverter: Three phase bridge inverter converts DC voltage input to three-phase variable frequency variable voltage output. DC voltage source can be a DC source or output of the rectifier. ... in proper sequence. The switch may be thyristor or IGBT etc.
three
phase
bridge
inverter
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346
views
1
answer
asked
Feb 14, 2018
by
anonymous
Explain three phase full wave controller.
Explain three phase full wave controller.
Last answer:
Three phase full wave controller: Three phase full wave controller is also called as the three-phase bidirectional controller. Let the load is star connected so at each phase there are antiparallel connected SCRs. ... conduct at the same time and the third phase will be open.
explain
three
phase
full
wave
controller
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230
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1
answer
asked
Dec 22, 2017
by
anonymous
What is a three phase connection?
What is a three phase connection?
Last answer:
RYB, 440 volt/phase
three
phase
connection
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99
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1
answer
asked
Nov 16, 2017
by
anonymous
three phase to single phase cycloconverter
three phase to single phase cycloconverter
Last answer:
three phase to single phase cycloconverter
three
single
phase
cycloconverter
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395
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1
answer
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