Difference Between A Four Point Starter And Three Point Starter?

1 Answer

Answer :

The shunt connection in four point stater is provided separately form the line where as in three point stater it is connected with line which is the drawback in three point stater.

Related questions

Description : Difference between a four point starter and three point starters?

Last Answer : The shunt connection in four point starter is provided separately from the line where as in three point starter it is connected with line which is the drawback in three point starter

Description : what is the difference between four point starter and three point starter?

Last Answer : The shunt connection in four point starter is provided separately form the line where as in three point starter it is connected with line which is the drawback in three point starter.

Description : To check the three line fuses of a three-phase system consisting of a three-phase motor, you must _____________. A. place the starter in the 'stop' position B. make sure the motor is operating at full ... leads across the 'hot' ends of the fuses D. place the leads across the bottom ends of the fuses

Last Answer : Answer: A

Description : Which of the following actions must be carried out before a voltage tester can be used to test the three line fuses to a three-phase motor? A. The fuses must be removed from the circuit. B. The ... disconnected and tagged. D. Nothing need be done as long as the motor is running under a light load.

Last Answer : Answer: B

Last Answer : Three point starter can be used for both shunt and compound motor.

Last Answer : A three point starter is considered suitable for shunt as well as compound motors.

Description : The electrical schematic shown in the illustration represents a/an ____________. EL-0017 A. across-the-line starter B. primary-resistor starter C. autotransformer starter D. part-winding starter

Last Answer : Answer: A

Description : When a fluorescent lamp fails to light, the trouble can be in the _____________. A. lamp B. starter C. ballast D. all of the above

Last Answer : Answer: D

Description : When a fluorescent lamp has reached the end of its useful life, it should be replaced immediately, or the resultant flashing may _____________. A. blow the lamp's circuit breaker B. explode, ... fly in all directions C. short circuit the ballast transformer D. damage the starter and the ballast

Last Answer : Answer: D

Description : Motor starter or controller contacts may become welded together if the contacts _____________. A. open too quickly and arc B. close under excessive pressure C. open or close too quickly D. close under excessive starting current

Last Answer : Answer: D

Description : Motor controller or starter contacts may become pitted and welded together if the contacts _____________. A. open under loaded conditions B. close slowly with light pressure C. open too quickly and arc D. close quickly with proportionate pressure

Last Answer : Answer: B

Description : Excessive heat in an operating motor controller can result from _____________. A. a closed starter contact B. loose connections C. missing arc chutes D. low motor starting torque

Last Answer : Answer: B

Description : An across-the-line starter provides ___________________. A. maximum torque B. slow starting power C. high speed D. reduced voltage

Last Answer : Answer: A

Description : If the contacts of a motor starter or controller fail to drop out when the 'stop' button is depressed the ____________. A. contacts are carrying excessive current B. contacts have become welded together C. shading coil is broken D. shading coil is loose

Last Answer : Answer: B

Description : Low voltage releases as used in some shipboard motor starter and control equipment will have which of the following characteristics? A. They trip circuit contactors when the motor starts to overspeed. B. ... coil of the starter. D. They allow the motor to restart upon restoration of normal voltage.

Last Answer : Answer: D

Description : Which of the following components are used to assemble a fluorescent lighting system? A. Lamp B. Starter C. Ballast D. All of the above

Last Answer : Answer: D

Description : In a faceplate-type motor starter, the starting arm is held in the 'OFF' position by a/an _____________. A. cotter pin B. magnet C. electrical circuit D. strong spring

Last Answer : Answer: D

Description : The rotor slots of a repulsion-type motor are generally skewed (placed nonparallel to the rotor axis) to _________. A. produce a constant starting torque B. permit a greater air gap with the starter C. permit a smaller air gap with the starter D. reduce eddy current losses

Last Answer : Answer: A

Description : An across-the-line starter is typically used for which of the following applications? A. Reduced-current starting of large motors B. Low torque starting of small motors C. Low resistance starting of DC motors D. Full-voltage starting of motors

Last Answer : Answer: D

Description : Which component of the circuit shown in the illustration is the starter? EL-0081 A. A B. B C. C D. D

Last Answer : Answer: B

Description : The diagram shown in the illustration represents a _________. EL-0058 A. dual speed, 2-winding motor controller B. navigation running light circuit C. single phase, 2-motor selectable starter D. common fluorescent lighting circuit

Last Answer : Answer: B

Description : What is the Necessity of Starter of an Induction Motor?

Last Answer : Induction motors, when direct-switched, take five to seven times their full-load current and develop only 1.5 to 2.5 times their full-load torque. This initial excessive current is ... electrical equipment connected to the same lines. Hence, a starter is necessary to overcome this objection.

Description : What is the necessity of starter?

Last Answer : Its function is to reduce starting current and also provide protection against over load and over voltage.

Description : What is the purpose of static starter? How current setting adopted?

Last Answer : The static starter limits the starting current of the motor to 2.5 times the motor rated current instead of 6 times the rated current. If the motor is directly on UPS, the UPS fuse will blow, ... set to limit the starting current. This is achieved by firing angle control of back to back thyristor. 

Description : Based on what factors will you select rating of components for a starter cell?  

Last Answer : Factors for selecting rating of components are, a. Capacity of load. b. Type of starting. c. Duty (continuous or intermittent). d. Type of protection. e. Nature of starting (acceleration time is slow or fast). 

Description : Why starter is necessary to start the AC motor?

Last Answer : a. At the time of starting motor starting current is high (4 to 5 times). Therefore if motor is directly started the supply voltage may be disturb. b. By the help of starters starting and ... . d. Protect the motor from no-voltage and its difficulties. e. Permits automatic control when required.

Description : What are the types of DC motor starter?

Last Answer : a. DC two point starter for series motor. b. DC three point starter for shunt motor. c. DC four point starter for compound motor.

Description : What is the necessity of DC motor starter?

Last Answer : Eb = V - Ia ra. ∴ Ia = V - Eb / ra. At the time of starting from the rest there is no any back emf (Eb) in the armature. So a large current flows through the armature based on ... develops back emf (Eb) which regulates it's speed and armature current. This can be achieved by the help of starter.

Description : What are the advantages of star-delta starter with induction motor?

Last Answer : The main advantage of using the star delta starter is reduction of current during the starting of the motor. Starting current is reduced to 3-4 times of current of Direct online starting Hence the starting current is reduced , the voltage drops during the starting of motor in systems are reduced

Description : Why star delta starter is preferred with induction motor?

Last Answer : Star delta starter is preferred with induction motor due to following reasons: Starting current is reduced 3-4 times of the direct current due to which voltage drops and hence it causes less ... caused. In addition, starting torque is increased and it prevents the damage of motor winding.

Description : 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.

Description : 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 

Description : In the flow of one cycle of single phase AC current past any given point in a circuit, the maximum current peak occurs _____________. A. one time B. two times C. three times D. four times

Last Answer : Answer: B

Description : Has anyone on the planet ever started a fire with a Harbor Freight Magnesium Fire Starter Kit?

Last Answer : Nope In high school, the chemistry teacher, on a cold winter's day (15* F the night before) made a hole in the soccer field and poured a mixture of a kilo of rust and a half kilo of aluminum ... Zippo lighter, It thawed the ground for ten inches around the hole, and the flame was over 2 foot high.

Description : Opinions on Ovation guitars as a starter instrument?

Last Answer : answer:You can't have too much instrument for a beginner! A bad instrument will hold you back and put you off because you will be fighting with it. The consensus on Ovation guitars over here is that recently they ... should be great! (Would love to see a pic!) And yes, sounds like a great price :-)

Description : Good no-styling starter blogger template?

Last Answer : answer:I know you're on Blogger but if all you're trying to do is learn from some existing templates on a well-known blogging platform, then perhaps you should try Tumblr instead. They offer ... started with selecting the template you want. All of the HTML/CSS/JS is completely editable by you.

Description : For testing websites, Can I test for Windows 7 on Windows 7 Starter and can it get IE9?

Last Answer : answer:Yes, IE9 installs on all versions of Windows 7, so you'd be fine there. There may be a better way to do this than buying a dedicated computer though. Have you looked into ... with windows 7 as an option? Something like VirtualBox might be a simpler (and less expensive) solution.

Description : Where can I find a good starter bagpipe?

Last Answer : May I recommend you get a bagpipe chanter first, that way you could learn the fingering of the instrument before you go for the full bagging and the stuff. Couldget one for as low as ten bucks at eBay.

Description : Wallpaper dilemma on windows7 starter?

Last Answer : Is the copy of Windows you have a legal copy?

Description : Is the installation of an auto alarm/remote starter causing my check engine light to come on?

Last Answer : Check engine is usually emission related isn’t it? I don’t know how the alarm was installed but unless some electrical malfunction is occurring I’d say unrelated.

Description : What does the "starter" do in bread recipes such as ciabatta?

Last Answer : The starter gives the yeast time to activate and grow as yeast is the primary rising agent. The longer the yeast activates for the more flavourful your bread will be. I like to have my bread rise slowly, ... hours and then again, on the counter, for another 5 or 6 hours. Makes for very tasty bread.

Description : Windows Starter 7 or XP service pack 3?

Last Answer : answer:Win 7. Future-proof yourself. Though it’s kind of a coin flip. Aside from cosmetics (Aero!), both will do 99% of what you want. Wait, Starter does not do Aero. Coin flip!

Description : How much will a new starter cost me?

Last Answer : Should be anywhere from 30–60 US dollars. You might be able to order one off Ebay or find one at a junkyard for cheaper. I found the starter for my car at a junkyard, and payed $5 for it. It hasn’t had a single problem.

Description : I have just piked up the D&D starter set, what is the next logical step in the word of D&D?

Last Answer : What word? What’s “piked”?

Description : Can anyone recommend a starter website building tool for novices?

Last Answer : Try wordpress.com. If you don't know how to build one yourself, than you want to focus on content and not design. In addition to it being for blogging, you can actually build Web sites with the ... and tutorials for how to use Wordpress on the Internet and even a Wordpress for dummies book at B&N.

Description : Will frequently shutting off the engine to prevent long idling shorten the life of the starter?

Last Answer : answer:A friend of mine just sent me a link to an article on Hypermilling…I have the same question as you do about this. I would think that the pieces and parts used to run the car would get worn out a lot quicker. http://ecomodder.com/forum/EM-hypermiling-driving-tips-ecodriving.php

Description : If you could be a major league pitcher, would you rather be a starter or a closer?

Last Answer : If it were any other sport, I might say the former. But there are so many damn games in one baseball season! I’m going to have to go with starter.

Description : My daughter has been taking riding lessons for over a year. She's mentioned that she'd really like to have a horse, and I'm considering getting one for her. What breed is best for starters? Is it better to get a male or female horse?

Last Answer : Quarter horses have a calm demeanor. But the truth is that any horse you bond with will be a good choice. When you're ready to purchase, take someone with you who is knowledgeable about horses to help you with your choice of horse.

Description : my avacado leafs are turning brown on my starter plant

Last Answer : Need Answer

Description : I have some matchsticks set up like this: I + XI = X. If you do not know Roman numerals, here is a quick starter: I=1 II=2 III=3 IV=4 V=5 VI=6 VII=7 VIII=8 IX=9 X=10 XI=11 ... are told to move the minimum number of matchsticks to make the question correct. So, how many do you have to move? -Riddles

Last Answer : Most people would get to one move at the least, but the real answer is zero moves. If you rotate the whole question around 180 degrees, it will display this: X = IX + I