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Can u imagine a merrygoround with so many kids on it that three kids can hardly turn it? now imagine that same merrygoround with only two kids trying to turn it. Same thing with one line missing. it will sit there and burn until a breaker goes or the other kids burn out.

If you have a motor running it will run until it is stopped but it wont start again.



called single phasing,, the other 2 phases ampers increase and trip the motor overloads.. or blow fuses

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โˆ™ 2015-07-14 15:52:46
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Q: What happens when a phase gets disconnected in a 3 phase four wire and 3 phase three wire system?
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Related Questions

What happens if one phase fails in three phase system?

If one phase fails in a three phase system it will cause the voltage to drop.

What happens if the source of 220 Volts originates from two legs of a 3-phase circuit?

Nothing happens. This is a normal way to obtain a single phase system from a three phase system.

What happens when a three phase motor losses a phase?

The overload protection system of the motor should activate immediatly to save the motor from burning.

How many volt each phase in three phase?

The voltages in each of the three coils of a three phase system will be equal no matter what voltage the system uses.

How does a two-phase system differ from a three phase system?

A two-phase system is archaic and you are unlikely to find it in use anywhere these days, so it is mainly of historical interest. A two-phase, three-wire system, consists of two phase voltages, displaced from each other by 90 electrical degrees, and a phase voltage which is 1.414 x phase voltage.A three-phase system consists of three phase voltages which are displaced from each other by 120 electrical degrees. In the case of a three-phase, three-wire, system, the line voltages are numerically equal to the phase voltages; in the case of a three-phase, four-wire, system, the line voltages are 1.732 x phase voltage.

What cannot be considered a single phase?

Any load that needs three legs from a three phase system can not be considered single phase. Single phase from a three phase system only needs a connection to two legs.

In a modern industrial plant the most likely polyphase power system in use is a a one-phase system. b two-phase system. c three-phase system. d four-phase system.?

A "three-phase system" is a polyphase system having three phases. The term "polyphase system" just means a system having multiple phases. If it is used by itself, "a polyphase system" doesn't mean "a three-phase system".

How do you convert 3phase to 2phase?

A two-phase system is an archaic system, in which two voltages are generated ninety electrical degrees apart. For a two-phase, three-wire, system the line voltage is 1.414 times the value of the phase voltage. This system has been long replaced by a three-phase system, in which three voltages are generated 120 electrical degrees apart. You cannot, therefore, convert a three-phase system to a two-phase system.

What is a balanced three phase system?

A balanced three phase system is where the currents into the loads placed on all three phases of the service are reasonably close to each other in amperage.Another opinionA 'balanced' three-phase system describes a three-phase load in which each phase current is identical in both magnitude and phase. If the phase currents are only 'reasonably close', then the load is not balanced.

What is the advantages of a three phase system over the single phase system?

The 3 phase system has an advantage for the single phase system for sure, the 3 phase system has more power than the single phase system, such that p=3vicos(theta).

How many degrees out of phase are the voltages of a three phase system?

3 phase is 120 degrees out of phase to each other <<>> There are 120 electrical degrees separation between phases in a three phase system.

How does a two phase system differ from a three phase system?

Two-phase is a system that was used before the advantages of three-phase were accepted. A two-phase system supplies two equal voltages 90 degrees apart in phase. This can be used to provide a rotating magentic field for motors, but it does not really provide the transmission efficiency of three-phase, which uses three voltages 120 degrees apart in phase, and has supplanted two-phase almost completely.

What is kando system?

it convert the single phase in to three phase.

What is the difference between three phase and single phase in losses?

in three phase you have lost moreAnswerFor a given (balanced) load, the line current in a three-phase system is lower than for a single-phase system by a factor of 1.732 and, since line losses are proportional to the square of the line current, three-phase systems have lower line losses than a corresponding single-phase system.

What is the advantage of three phase three wire system in metering system?

Compared with what?

What is the difference between 3 phase 480 and 2 phase 480?

In a three-phase system, the three phases are displaced from each other by 120 electrical degrees, whereas in a two-phase system, the two phases are displaced form each other by 90 electrical degrees.Three-phase systems may be three-wire or four-wire systems. Two-phase systems may also be three-of four-wire systems. However, a two-phase three-wire system is the equivalent of a three-phase, four-wire, system.For a three-phase, four-wire, system, the line voltage is 1.732 times the phase voltage.For a two-phase, three-wire, system, the line voltage is 1.414 times the phase voltage.Two-phase systems are extremely rare, so the point of your question is unclear.A two-phase system is not the same as the system (240/120 V) used in North America to supply residential premises, although it is occasionally but incorrectly referred to as such

In a modern industrial plant the most likely polyphase power system in use is a A. one-phase system. C. three-phase system. B. two-phase system. D. four-phase system.?

three phase system......

Do you have to use two wattmeters to measure the total three-phase power on a balanced three-phase three-wire system?

Yes. It is one proven method to measure power in a three phase system.

Is three phase induction motor continue running when any of the two phase is disconnected?

This question doesn't really make any sense - any of the two phase? A three phase induction motor requires 3 phases to start - if a single phase is lost while the motor is already running then yes the motor will continue to run. A three phase motor will not start if it is missing a phase.

How do you convert 220V two phase to 220V single phase?

Two phase systems are no more. They were replaced by the three phase system which is what we use today. If you are talking about drawing 220 volts from a three phase system then all that has to be done is use any two of the three phase legs. When this is type of connection is used it is known as taking single phase from a three phase system. In North America a common three phase wye system is 120/208 where between the phase wires the voltage is 208 volts and between any phase leg and the star point (neutral which is grounded) the voltage is 120 volts.

What happens when the power company connects a large single-phase load to a three phase power line?

They simply choose one of the three legs of the three phase power to supply the single phase load. Nothing special happens. This is done all the time.

Three phases of digestive system processes?

The Cephalic Phase, The Gastric Phase and The Intestinal Phase.

What is the purpose of a phase conductor?

There is no such thing as a 'phase conductor'; the correct term is 'line conductor'. In a single-phase system, the line conductor is the energised conductor; in a three-phase system, there are three (energised) line conductors.

What are the advantages of three phase to two phase electric power distribution systems?

There are two types of two-phase system, a four-wire system and a three-wire system. Like a three-phase system, a two-phase system has the advantage of producing a rotating magnetic field in induction motors.However, two-phase systems are archaic and probably don't exist any more, on the grounds that a two-phase, four-wire, system (with electrically-separate phases) is regarded as being 'cumbersome', while there is difficulty in maintaining balanced voltages at the load terminals of two-phase, three-wire, transmission systems.The problems associated with two-phase systems do not apply to three-phase systems.

Can three phase be converted to single phase?

Yes, very easily. In fact any two legs of a three phase system is classed as a single phase.