0
It is essentially a safety feature. The "neutral point" of the star (or Y) configuration in three-phase circuits would normally be at an electrical potential of 0 (zero) volts, but if the circuit is unbalanced the voltage at this point could rise considerably. If this point is earthed and any voltage appears at this point due to a circuit imbalance, an "earth leakage current" will begin to flow. This earth leakage current can be detected and used to trip a circuit-breaker to cut off the electrical supply for safety. Earth Leakage Circuit Breakers (ELCB) are commonly used in industry and around the home for reasons of safety.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What is the connection between pulsars and the Crab Nebula?
At the centre of the Crab Nebula is the neutron star - Crab pulsar.
What is the difference between the eastern star and the masons?
They are both fraternal organizations but the only connection is in order to be in the Order of Eastern Star (OES) you must have a male relative that is/was a mason.
Measurements of a binary star system are required to determine what property of the stars?
Luminosity
What star is the source of the earth's light and heat?
That would be the sun. It is a star and provides the light and warmth required to support life and flowing water.
What color is the youngest star?
A colour cannot be assigned to a young star. It all depends on the mass of the star as to what temperature it will reach, and this temperature will dictate what colour it is.
What is the difference between earthing boss and earthing lug and where to use?
An earthing boss and earthing lug are parts of a grounding connection. An earthing boss is in a casting that allows for the drilling and tapping of hole. A earthing lug is used to bond a wire to the ground.
Where will be earthing swithing used?
there is never a switch in an earthing conductor in portable equipment the plug is constructed so that the earth connection is made first and broken last when removed
How do you connect an earthing transformer with star connected secondary?
transformers transform
How many earthing are required to install transformer?
Four number earthing are essential for installation of transformer as under : 1) Two earthing for transformer body. 2) Two earthing for Neutral Point. Note : Numbers of earthing may be increase as per the client requirement.
Is grounding or earthing required for diesel tank?
Thats a good question
Why is double earthing required?
R = r1*r2/r1+r2
Is the star-delta transformer commissioned without earthing transformer or NGR?
Yes, possible. NGR or earthing transformers are used when it is necessary to limit the fault current.
Is earthing required in Underground transmission line?
Earthing is always required. It is necessary so that a fault or overvoltage, such as caused by a lightning strike, may be conducted to earth (ground), either dissipating the energy and/or tripping the protective device.
How much salt and charcoal need for earthing?
For earthing pipe of 40mm dai & 3 mtr. Long required 5 kg. Of salt & 6.5 kg of charcoal. This type of earthing is done for distribution transformers of various rating.
What is the definition of star connection?
The definition of star connection is a connection of the ends of phase windings at the star point.
What is the difference between chemical earthing and conventional earthing?
Chemical Earthing and Conventional Earthing are different types of earthing techniques. Conventional Earthing is based on plate earthing and pipe type earthing but Chemical Earthing on GI or Copper.
When is earthing required?
As it's a safety factor, earthing is essential and mandatory. It's an electrical connection between the exposed metallic parts of an electrical appliance or installation and the earth, regarded to have zero potential. Proper earthing provides an alternative and easy path for leakage or faulty current to flow. It ensures that any exposed conductive part of the appliance does not reach a dangerous level of potential or voltage that endangers the user's life. A proper earthing system should have least electrical resistance, good corrosion resistance and ability of dissipating high faulty current.
