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What is the Difference between restricted earth fault and earth fault?
Wiki User
∙ 14y ago
short circuit and fault current are not related or comparable practically or mathematically. a short circuit is a break down in insulation causing contact between live/line conductors. fault current is different. it is measured in the value kA and is the benchmark as to whether your overcurrent device is adequate. this is determined by measurement or enquiry to the local provider.ohms law applies- I=V divided by R.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoRestricted earth fault protection (REF) is a function available in some microprocessor based relays. In these relays, what this means is it is protection for earth faults within the protected zone, but will not operate for faults outside this zone. Hence, it is restricted.
Wiki User
∙ 13y agoNA fault is where there is a crack in the earth surface. Some faults push tward each other and others are pushed away. When this motion happens with the faults we call them earthquakes. NOT ALL Earthquakes are on faults but most are close to one
Wiki User
∙ 13y agoIn a typical electrical circuit, current flows through the "hot" and "common" wire, or the two "hot" wires of a 240 circuit. In a condition such as that, an equal amount of electrical energy flows through both wires with one being the positive and the other being the negative. Naturally, since the power is alternating current, the positive and negative states are constantly changing.
As long as the current through one wire is identical to the current through the return wire, there is no earth fault or earth leakage.
In the case of a damaged appliance, the insulation on a field winding may become burned or otherwise damaged, causing leakage to the case of the appliance or otherwise "leak" current to earth (or ground). That is the leakage condition.
Specially designed safety devices have been created to protect from injury due to that kind of leakage.
The ground fault circuit interrupter (GFCI) constantly compares the current across the two wires and shuts down a circuit whenever an inequality exists that can potentially cause harm. When a GFCI detects the inequality, it's called a ground fault.
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What is the difference between fault lines and plate boundaries?
Fault lines are simply where cracks appear in the earth's crust from the movement of the plates.
Difference between compartmental fault and tear fault?
It is the same
What is the difference between earthquauke and fault?
A fault is the zone where two tectonic plates meet. An earthquake is vibration through the earth caused when the two plates on a fault line slide past each other.
What is the difference between trench and fault?
putapete
What is the difference between a strike slip fault and a normal fault?
strike-slip has a horizontal motion
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 is the difference between a crack in the earths crust and a fault?
There is no difference. The definition of fault is precisely: a crack in the Earth's crust.
What is a restricted earth neutral system?
appropriate resistance is to be inserted between the neutral point of the transformer and the earthing mat to restricted earth fault current. for this purpose a sensitive earth leakage relay is used. in the event of a fault, fault current returning to the system neutral trips an earth leakage relay and disconnects the supply. anand r. ambekar
What is a difference between ground fault and earth fault?
They mean the same thing, a current to ground/earth that shouldn't exist in the circuit.
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.
Restricted earth fault protection circuit?
Restricted earth fault protection is used to protect a specific zone, and should not trip for a fault outside of that zone (usually limited to a transformer, and possibly extending to lowside, highside, and tertiary breakers).
What is the difference between fault lines and plate boundaries?
Fault lines are simply where cracks appear in the earth's crust from the movement of the plates.
What is an Unrestricted Earth Fault?
I'm guessing this is in reference to a restricted earth fault, and you want to know what the opposite is? Restricted earth fault protection is designed to operate for earth faults within a specific zone. Unrestricted protection will operate for faults "anywhere", as long as the pickup can be satisfied. For example, REF (restricted earth fault) transformer protection looks for a small amount of neutral current, and if this exists, and the relay identifies this current as being within the zone of protection, the relay will trip. If it were unrestricted, the small amount of neutral current alone would be enough to cause a trip.
Difference between compartmental fault and tear fault?
It is the same
What is the difference between earthquauke and fault?
A fault is the zone where two tectonic plates meet. An earthquake is vibration through the earth caused when the two plates on a fault line slide past each other.
What is the difference between Earth Fault Relay and Earth Leakage Relay?
Earth leakage relays are instantaneous tripping relays where as earth fault relays have the option of time and ampere setting i.e. for a setted ampere the circuit breaker will be tripped off after the setted time (in second).
What the difference between an earthquake and a fault?
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