0
Three phase Delta motors can continue to operate when one phase has an earth (ground) fault, when the motors are powered from an ungrounded Delta or Wye (star) service. This feature can be helpful in agricultural and oil rig pumping because it allows the operation to continue until the affected motor can be replaced. Motors on a grounded service will trip and the pumping will stop immediately after one phase goes to ground.
What else can I help you with?
What is meant by ground fault?
The ground ('earth'), because of its mass, is a reasonably-good conductor and is used as a 'reference' for a distribution transformer's neutral terminal. A ground fault ('earth fault') occurs when the line conductor from the distribution transformer makes accidental contact directly with the ground ('earth'). The resulting low-resistance earth path back to the transformer's neutral is such that the resulting ground-fault current('earth-fault current') will operate the transformer's overcurrent protection device (e.g. fuse).
What is an earth or ground continuity conductor?
An earth or ground conductor that is used for continuity throughout the home is the ground conductor that is found in cable wire sets. What it is used for is to bring everything that it is connected to down to the same potential which is zero. The grounding circuit is a low impedance circuit. If a fault occurs on any equipment and shorts out to ground, this conductor being directly connected to the distribution panel, carries the fault and trips the breaker feeding the faulted circuit.
What neutral ground resistor?
Neutral Ground Resistor is using for minimizing the fault current of system. It is a resistor which connected between ground and neutral and increase the resisting path for fault current.
Why neutral of generator is resistance grounded and neutral of motor is reactance grounded?
You can use resistance or reactance grounding on generators and motors. My understanding is resistance grounding is often used to limit ground fault currents to a few amperes, while reactance grounding will limit fault current to less than the three phase fault current. If reactance grounding is used to limit fault current o very little (like resistance grounding), transient overvoltage problems can occur.
What is the GFCI?
The Ground Fault Circuit Interrupter (GFCI) is an electrical device designed to protect against electric shock by quickly cutting off power to a circuit if it detects a ground fault, such as current leakage. It is commonly used in areas where water and electricity may come into contact, such as bathrooms, kitchens, and outdoor outlets.
What is the difference between a fault and a fold?
a fault is a large crack in the earth. a fold is when the ground gets bent.
What happens along fault beneath Earth's surface when an earthquake occurs?
if your on a fault it will shake and shift ground above
When the ground slips at fault lines the movement the earth undergoes is called what?
earthquakes
When the ground slips at fault lines the movement the earth undergoes is called?
an earthquake
What is a circuit connected to the Earth called?
Grounding?AnswerIf a line conductor is unintentionally connected to earth, then it is an earth fault.
What is meant by ground fault?
The ground ('earth'), because of its mass, is a reasonably-good conductor and is used as a 'reference' for a distribution transformer's neutral terminal. A ground fault ('earth fault') occurs when the line conductor from the distribution transformer makes accidental contact directly with the ground ('earth'). The resulting low-resistance earth path back to the transformer's neutral is such that the resulting ground-fault current('earth-fault current') will operate the transformer's overcurrent protection device (e.g. fuse).
Can you glow led by using neutral and earth?
If you connected neutral and earth (ground) to each lead in an LED and it glowed then this would be evidence of a ground fault.
What is the difference between balanced earth fault and restricted earth fault?
There is such a thing as a three phase to earth fault, so maybe this is what you mean by a "balanced earth fault". I don't believe any earth or ground currents would flow in this case. A restricted earth fault is a typical phase to earth fault, where the zone of protection is restricted to a specific area, such as around a transformer. "Restricted" is referring to the protection method, not what is actually going on with the currents and voltages.
What effect of of earthquake?
The ground shakes, and the earth is displaced along a section of the earthquake fault.
Why neatural ground resistor using in 33kv transformer?
The function of a neutral earth resistor is to limit any fault current resulting from fault between a line conductor and earth.
Will earth fault affect batteries discharging in an equipment?
If one terminal of a battery is earthed (and, by this, we normally mean a 'chassis earth'), then an earth fault within the circuit supplied by the opposite terminal will result in the battery being discharged. The rate of discharge depends on the resistance of the earth fault.
Can earth fault current go up passing through the downstream panel and directly cause a trip at the upstream panel which have higher set point of earth fault protection?
If the fault is a direct short to ground, the fault current can be high enough to trip the upstream protection.
