Damaged or frayed wires that can cause shocks or short circuits, loose wire connections that cause sparking, overloaded circuits that consistently trip breakers and overloading extension cords beyond their rated capacity.
In three-phase systems, a fault may involve one or more phases and ground. This functionality is not as common on underground systems as faults.
Earth wire is meant to protect the user in case there is earth fault in the device or circuit. Only earth wire alone is not sufficient. It needs to be provided with suitable circuit breaker that breaks the circuit automatically.
Electrical discrimination is when a smaller circuit breaker (fuse) located closer to an electrical fault, operates before a bigger circuit breaker which is further away from the fault. This then stops disruption to other circuits by knocking out the fuse which not only knocks out the fault, but all the other circuits with no faults on them.
An earth-fault loop is the path taken by the fault current, when an earth-fault occurs within an electrical installation, and comprises a series circuit made up ofthe utility company tranformer's low-voltage winding,the utility company's distribution cable's line conductor,the consumer's line conductor to the point of an earth fault,the consumer's earthing conductor,and the resistance of the earth path back to the transformer.The combined opposition of this series circuit to the flow of fault current is termed the earth-fault loop impedance, expressed in ohms.
we use grounded electrical circuit to prevent high voltage from any type of electrical source. with the help of grounded electrical circuit we by pass the high voltage to the ground. in common language we call it earthing.
It could be a phase to phase, ph to neutral or earth fault. In single ph wiring ph to ph exhibits no short ckt faultAnswerYes, but you have got the terminology wrong. There is no such thing as 'phase-to-phase', the correct term being 'line-to-line'. So you can have a short circuit as a result of a line-to-line fault, a line-to-neutral fault, or a line-to-earth fault.
Earth wire is meant to protect the user in case there is earth fault in the device or circuit. Only earth wire alone is not sufficient. It needs to be provided with suitable circuit breaker that breaks the circuit automatically.
An electrical fault is where the electrical current goes where it is not intended to go. Usually this is the quickest and shortest return path to the electrical supply service. An electrical fault will trip breakers and blow fuses in the circuit as protection to stop the short circuit.
An electrical fault is where the electrical current goes where it is not intended to go. Usually this is the quickest and shortest return path to the electrical supply service. An electrical fault will trip breakers and blow fuses in the circuit as protection to stop the short circuit.
The main purpose of earthing electrical circuits is to provide a low-impedance route back to the substation transformer which, in the event of an earth-fault will allow sufficient fault current to flow in order to operate a circuit's overcurrent protection.
An electrical breaker is a safety device used to open a circuit that has an electrical fault on it.
Electrical discrimination is when a smaller circuit breaker (fuse) located closer to an electrical fault, operates before a bigger circuit breaker which is further away from the fault. This then stops disruption to other circuits by knocking out the fuse which not only knocks out the fault, but all the other circuits with no faults on them.
A Fuse or a circuit breaker can be used to protect an electric circuit from over loads. A surge arrestor / over voltage relay can be provided for voltage protection An ELCB/ Earth fault Relay may be provided for earth fault protection. Electrix Chennai, India.
An earth-fault loop is the path taken by the fault current, when an earth-fault occurs within an electrical installation, and comprises a series circuit made up ofthe utility company tranformer's low-voltage winding,the utility company's distribution cable's line conductor,the consumer's line conductor to the point of an earth fault,the consumer's earthing conductor,and the resistance of the earth path back to the transformer.The combined opposition of this series circuit to the flow of fault current is termed the earth-fault loop impedance, expressed in ohms.
In an electrical context, 'tripping off' means the circuit breaker breaking the circuit because of a fault.
I am assuming that its a 240 Volt AC circuit supplying an inductive load with a fault loop impedance of 1.9 ohms at the time of the short circuit. The power factor is assumed to be 0.8 The instantaneous earth fault current value would be; Current = (Voltage x Power Factor) / Impedance (240 x 0.8) / 1.9 192 / 1.9 = 101 Amps. However this may be a trick question as it doesn't ask for an instantaneous value, the fuse will limit the fault current to 15 amps and should disconnect the circuit within 0.4 seconds.
They mean the same thing, a current to ground/earth that shouldn't exist in the circuit.
To prevent overheating/damage/fire of the electrical components in a circuit.