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What is the reason why the neutral is not used on high resistance grounding?
Wiki User
∙ 12y ago
The question doesn't provide enough detail to give a definitive answer. The neutral PD is often used in protective functions on high resistance grounded generators (when grounded through a transformer).
High resistance grounding limits the use of Transformers - you must be using balanced loads, since very little current will flow (typically around 5-20amperes max) to the neutral. Because of this, phase to neutral values (such as voltage) are meaningless. Any current flowing in the neutral will cause an offset in all three phases from neutral. Since the neutral is high resistance grounded, it does not take a significant amount of current to cause significant offset.
Wiki User
∙ 12y ago
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Does plastic have a high resistance?
Yes, it has a high resistance as it is an insulator.
What is definition of residual voltage?
Net voltage in the Neutral of a three phase electrical system is called residual voltage.
What is high resistance and low resistance?
Low resistance lets electrons through easy, and high makes it harder for them to pass. Basically electricity is harder to flow through high resistance and vice versa.
Why neutral is earthed?
Neutral earth is very necessary for observe the unbalaced laod of the 3 phase system. it is also useful for single phase supply and in lighting purpose. neutral earth is also earthed the short ciruit fauly current , which is flowing through neutral. this type it is very essencial for protection and safety purpose.AnswerThere are a number of reasons why the neutral of a supply is earthed (grounded). The first reason is to protect the low-voltage secondary side of the distribution tranformer in the event of a short circuit from the high-voltage secondary side (it will cause the protection on the high-voltage side to disconnect the transformer). The second reason is to establish a datum point for potentials measured on the secondary side of the tranformers -in particular, if the star-point of a three-phase transformer is not earthed, then an unbalanced load will result in unbalanced supply phase voltages, and a potential-difference between neutral and earth -both undesirable and dangerous.
Dc resistance of diode is a static resistance b dynamic resistance c high resistance d zero resistance?
B - Dynamic resistance
How to correct floating voltages in system neutral?
Floating means there's no reference to ground, so to fix this you supply a reference to ground (be it corner grounding, solidly grounding, high resistance grounding, etc.)
What is the use of the grounding wire in an electrical circuit?
The grounding pin of devices are connected to an independent ground wire. This wire is used for a direct path back to the distribution panel independent of the neutral. On a split phase secondary the neutral is used by other circuits on the system and indirectly makes its way back to the distribution panel. This indirect path introduces a resistance in the neutral which could interfere with an instantaneous trip of the over current device. Using a ground wire from the grounding pin on the three blade plug allows a direct low resistance path which takes the fault current back to the distribution panel which then causes an instantaneous breaker trip due to the high current in a short circuit.
What happens if you splice ground wire and neutral wire in a high hat fixture?
Ground and neutral are kept separate for a reason. They are only "bonded" at the main panel. The reason is that you can create what are called ground loops where current can flow. This is because all wires have some resistance and by connecting neutral and ground you open yourself to these ground loops which can cause shocks or can adversely affect electronic equipment.
Define earth voltage and neutral voltage?
As the neutral point of an electrical supply system is often connected to earth ground, ground and neutral are closely related. Under certain conditions, a conductor used to connect to a system neutral is also used for grounding (earthing) of equipment and structures. Current carried on a grounding conductor can result in objectionable or dangerous voltages appearing on equipment enclosures, so the installation of grounding conductors and neutral conductors is carefully defined in electrical regulations. Where a neutral conductor is used also to connect equipment enclosures to earth, care must be taken that the neutral conductor never rises to a high voltage with respect to local ground.
What is the purpose of ground wire?
A ground wire is used for a direct path back to the distribution panel independent of the neutral. On a split phase secondary the neutral is used by other circuits on the system and indirectly makes its way back to the distribution panel. This indirect path introduces a resistance in the neutral which could interfere with an instantaneous trip of the over current device. Using a ground wire from the grounding pin on the three blade plug allows a direct low resistance path which takes the fault current back to the distribution panel which then causes an instantaneous breaker trip due to the high current in a short circuit.
What is the purpose of groundings?
A ground wire is used for a direct path back to the distribution panel independent of the neutral. On a split phase secondary the neutral is used by other circuits on the system and indirectly makes its way back to the distribution panel. This indirect path introduces a resistance in the neutral which could interfere with an instantaneous trip of the over current device. Using a ground wire from the grounding pin on the three blade plug allows a direct low resistance path which takes the fault current back to the distribution panel which then causes an instantaneous breaker trip due to the high current in a short circuit.
How do you check with mega that you have good grounding on electrical circuit?
when you say "mega" I am asuming you mean meggar-ohmmeternot the lottery This instrument is not appropriate to test for good grounding Good grounding requires LOW resistanceA Meggar is used for measuring for HIGH resistances You need a MICRO-ohmmeter or ground resistance meter A company called AEMC makes nice ground testers
What is the problem when some house lights are bright and others dim?
Check the neutral connections. An open neutral or a high resistance neutral can cause this type of condition. The obvious place to start your search is in the switch boxes that connects to the light fixture.
Why you use multiple grounding?
Application of ALG Slow release ion grounding device Lightning protection grounding ion grounding system advantages ● Device automatic adjustment function is strong, constantly to the electricity around the soil to replenish conductive ions, improve the surrounding soil resistivity. ● The electric unit adopts corrosion-resistant alloy material, and the return packing adopts chemical material with performance and high pressure impact resistance as auxiliary material. Extend its service life. Use 30 years. ● The backfill is made of physical and chemical substances with strong water absorption, strong adsorption and ion exchange as the main material. Complete the electric unit and the surrounding soil Highly effective and close combination, and will reduce the surrounding soil resistivity, effectively enhance the lightning conductivity release capacity. ● Back filler can fully contact with the grounding and surrounding soil, reducing the contact resistance. And good fluidity and permeability, increase the contact area with the soil, thus increasing the drainage area. ● Due to the low permeability material used in the electric unit, the resistance to direct lightning induction pulse attack is strong, and the secondary effect of lightning is prevented. ● Due to its excellent grounding effect and the regulation function, it is mainly used in high soil rate areas and cities with high density of buildings. ● Because of its excellent grounding effect, covers an area of less, construction work volume is small, saving materials. ● All the materials used in ion grounding body are non-toxic, non-polluting, and are products. ● Mature program, economic, reasonable, to meet the grounding conditions, resistance reduction of practical functions, naturalness, long life, good weather resistance, maintenance-free. Electrolytic ion grounding grounding system first introduced by the United States technology, and then developed in cooperation with domestic famous colleges and universities. Electrolytic ion grounding system internal and external have two kinds of negative ion filling material, electrolytic ion grounding external filling material has the water absorption, internal filling material using the electric ion compound, in through the role of dampness, electrolytic ion grounding can be effective release of active electric ions into the soil, and then the conductor external slow release resistance reduction, and keep the resistance value of long-term stability. Electrolytic ion grounding grounding system in the design process Must be in accordance with the corresponding standards, electrolytic ion grounding system applied copper clad steel grounding rod, fire clay fusion, submerged deep grounding, resistance reduction and other four science and technology to a large extent to solve the problem of resistance reduction, sex and service life, so that the product in all grounding performance and adaptability has obvious advantages, the application is very wide. Ion grounding according to the operating characteristics of grounding, welding point in addition to the general strength requirements, side emphasis on its electrical performance and sex. Electrical performance performance in the contact resistance of the joint should be similar to the steel rod raw material is good, generally require no greater than 10% of the same length of raw materials (150 a 180mitt) (Note: refer to the previous project acceptance standards), while the joint corrosion resistance performance should be equal to or better than the steel rod, so that the grounding steel rod joint (including feeder cable) can withstand the normal design of long-term human ground current, grounding safety operation. We are a professional ion grounding manufacturer, committed to providing customers with quality products, if you are interested in this, please contact Sichuan Sunlight Intelligent Co.
1.low resistance in n-p direction . 2. High resistance in n-p direction . 3. Very low resistance in n-p direction . 4. Double the resistance in n-p direction. Reason for rectifying action ofdiode?
The question doesn't describe1). What is low resistance ?2). What is high resistance ?3). What is very low resistance ?4). Double the resistance compared to what ?The reason for the rectifying action of a diode is the difference between itsresistance in one direction compared to its resistance in the other direction.In other words, its non-linearity.
Why you use grounding?
Application of ALG Slow release ion grounding device Lightning protection grounding ion grounding system advantages ● Device automatic adjustment function is strong, constantly to the electricity around the soil to replenish conductive ions, improve the surrounding soil resistivity. ● The electric unit adopts corrosion-resistant alloy material, and the return packing adopts chemical material with performance and high pressure impact resistance as auxiliary material. Extend its service life. Use 30 years. ● The backfill is made of physical and chemical substances with strong water absorption, strong adsorption and ion exchange as the main material. Complete the electric unit and the surrounding soil Highly effective and close combination, and will reduce the surrounding soil resistivity, effectively enhance the lightning conductivity release capacity. ● Back filler can fully contact with the grounding and surrounding soil, reducing the contact resistance. And good fluidity and permeability, increase the contact area with the soil, thus increasing the drainage area. ● Due to the low permeability material used in the electric unit, the resistance to direct lightning induction pulse attack is strong, and the secondary effect of lightning is prevented. ● Due to its excellent grounding effect and the regulation function, it is mainly used in high soil rate areas and cities with high density of buildings. ● Because of its excellent grounding effect, covers an area of less, construction work volume is small, saving materials. ● All the materials used in ion grounding body are non-toxic, non-polluting, and are products. ● Mature program, economic, reasonable, to meet the grounding conditions, resistance reduction of practical functions, naturalness, long life, good weather resistance, maintenance-free. Electrolytic ion grounding grounding system first introduced by the United States technology, and then developed in cooperation with domestic famous colleges and universities. Electrolytic ion grounding system internal and external have two kinds of negative ion filling material, electrolytic ion grounding external filling material has the water absorption, internal filling material using the electric ion compound, in through the role of dampness, electrolytic ion grounding can be effective release of active electric ions into the soil, and then the conductor external slow release resistance reduction, and keep the resistance value of long-term stability. Electrolytic ion grounding grounding system in the design process Must be in accordance with the corresponding standards, electrolytic ion grounding system applied copper clad steel grounding rod, fire clay fusion, submerged deep grounding, resistance reduction and other four science and technology to a large extent to solve the problem of resistance reduction, sex and service life, so that the product in all grounding performance and adaptability has obvious advantages, the application is very wide. Ion grounding according to the operating characteristics of grounding, welding point in addition to the general strength requirements, side emphasis on its electrical performance and sex. Electrical performance performance in the contact resistance of the joint should be similar to the steel rod raw material is good, generally require no greater than 10% of the same length of raw materials (150 a 180mitt) (Note: refer to the previous project acceptance standards), while the joint corrosion resistance performance should be equal to or better than the steel rod, so that the grounding steel rod joint (including feeder cable) can withstand the normal design of long-term human ground current, grounding safety operation. We are a professional ion grounding manufacturer, committed to providing customers with quality products, if you are interested in this, please contact Sichuan Sunlight Intelligent Co.
Car is in the red on the temp gage then goes back to cool then back up to red what cause this?
Hopefully your car isn't really getting that hot. I've heard that if the temperature sensor is grounding out accidentally it can read the maximum temp. Check for a loose wire or frayed one. Perhaps you can get someone to jiggle the wires to it while you watch to see if the gauge jumps. If you can find the specs of what the temp sensor should be reading then you can check it's resistance with a digital multimeter. Normally the temperature sensor is just a resistor that changes it's resistance based on it's temperature. Usually a high resistance when cold and a low resistance when hot. And if it's periodically grounding out - the resistance would be low, causing the high temp reading.
