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In parallel operation of diesel generators why one neutral contactor is used?
Wiki User
∙ 6y ago
To avoid possible current loop through multiple neutral points
Wiki User
∙ 6y ago
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How many wires to control a mechanically held contactor?
A contactor is a type of switch. However this switch uses electricity to power an electromagnetic coil to switch on or off power. Hence a contactor needs 2 wires - A live/hot wire and a neutral wire. Generally these are connected across the A1 and A2 terminals of the contactor.
How do you avoid floating neutral?
The neutral of a generator should never get into a condition where is is floating. All generators have the neutral tied to the frame of the generator set. It comes this way from the manufacturer. If it is floating then someone has disconnected the neutral wire from the frame. Just reconnect the neutral to the generator frame again to stop it from floating. Larger generators should also have a ground rod connected to the generator frame for grounding purposes.
Can loose neutral wire effect the operation of Earth Leakage Circuit Breaker?
Yes, a loose neutral wire can effect the operation of Earth Leakage Circuit Breaker.
Can you put one phase of a three phase ditribution board through a contactor so that the other phases stay on?
Yes, but you must have your neutral wire to form a return path for your current.
How do you wire a three phase forward - reverse starter?
You start with a normal one way circuit consisting of a three phase contactor and an three phase overload in series for the forward circuit. Then you add the reverse contactor in parallel with the forward contactor but with line one and line two crossed over i.e. when the reverse contactor is made, line one of the supply will be connected to line two of the motor and line two of the supply to line one of the motor. The control circuit must also be interlocked to prevent forward and reverse being energized at the same time.
How do you calculate voltage drop of the first generator when two generators are in series with a neutral?
Restate your question. Generators don't run in series. Generators always run on parallel synchronizing so your question is wrong.
What is the purpose of neutral contactor?
Presumably, you are asking the purpose of a neutral conductor, rather than 'contactor'?A alternating-current supply has two conductors, a lineconductor and a neutral conductor. The line conductor is at system potential (e.g. 230 V in Europe), whereas the neutral conductor is at approximately earth (ground) potential because it is earthed (grounded) at the supply transformer. The neutral conductor acts as the 'return' path to the transformer, carrying the same load current as the line conductor.
Why only one neutral contactor kept on line during synchronizing condition of two or more gen sets?
AnswerDistributed generator systems (gensets) are electric generating facilities that are close to the electric user's home or business.there is only a three phases for the generator output,generators usually connected Y-delta.Y- side is grounded solidly or through resestive or impedance.i think the nutral contactor your talking about is an grounding on the Y side of the generator.the condetion of synchrounizing two generators is:1- the same sequance ABC or ACB2- the same voltage level3- the same frequancyhave a nice day:)
Why neutral is necessary in a single phase operation?
Neutral is a return path.
How many wires to control a mechanically held contactor?
A contactor is a type of switch. However this switch uses electricity to power an electromagnetic coil to switch on or off power. Hence a contactor needs 2 wires - A live/hot wire and a neutral wire. Generally these are connected across the A1 and A2 terminals of the contactor.
How do you avoid floating neutral?
The neutral of a generator should never get into a condition where is is floating. All generators have the neutral tied to the frame of the generator set. It comes this way from the manufacturer. If it is floating then someone has disconnected the neutral wire from the frame. Just reconnect the neutral to the generator frame again to stop it from floating. Larger generators should also have a ground rod connected to the generator frame for grounding purposes.
Can loose neutral wire effect the operation of Earth Leakage Circuit Breaker?
Yes, a loose neutral wire can effect the operation of Earth Leakage Circuit Breaker.
What would be the effect on the neutral bar of a 3 phase D B if the main incoming neutral is lost?
A three phase delta system does not use a neutral in its operation.
How relay is used to control induction motor?
If you want to control induction motor using a control relay give neutral directly to the one point of coil of relay & one point of coil of contactor then give control supply through push button to second point of coil of relay. use one NO point of relay and give supply to coil of contactor. and also use one NO of contactor for holding the contactor & take OFF (NC) in the starting to stop motor after complition of work. It is jut like an Direct On-line starter.
Can you put one phase of a three phase ditribution board through a contactor so that the other phases stay on?
Yes, but you must have your neutral wire to form a return path for your current.
When do you need to connect the generator in parallel?
When you wish to bring a second generator on-line in order to do maintenance on the first one. They would be connected in parallel, but not yet switched on together, until you are sure they are both in phase. This is simply accomplished by connecting a light bulb between the Phase of one to the Neutral of the other. The bulb will wax and wane as the generators come in and out of phase. When the bulb is brightest, switch them together.
What is meant by neutral grounding reactor?
Neutral-earthing reactors or Neutral grounding reactors are connected between the neutral of a power system and earth to limit the line-to-earth current to a desired value under system earth fault conditions.
