An acceptable resistance for a ground to ground plate system is 2 ohms with a maximum allowance to 5 ohms. If the measured resistance is above 5 ohms more grounding rods or plates have to be added to reduce the resistance down to the acceptable levels.
400mega ohms acceptable....
30 micro ohms
415v air circuit breaker acceptable value of 0.01 ohms and lessthan
The PI value depends on the type of equipment being tested and the voltage level. Roughly it shall not be below the value of 2.0
The minimum acceptable insulation resistance value is calculated using the following formula: Rinsulation= (Vrated + 1 ) x (304.8 / L ) Where: Rinsulation is the minimum acceptable insulation resistance value, in mega-ohms; Vrated is the rated voltage of the cable (typically printed on the cable), in kilovolts; and L is the length of the cable, in meters (if the cable length is in feet, replace the number 304.8 with 1000).
400mega ohms acceptable....
30 micro ohms
132kv MOCB acceptable value of somthing 150 micro ohms.
It depends completely on the application
415v air circuit breaker acceptable value of 0.01 ohms and lessthan
more than 1 G ohms is acceptable. cheers
The PI value depends on the type of equipment being tested and the voltage level. Roughly it shall not be below the value of 2.0
-determine the direction and value of current -determine the potential difference -determine the value of resistance
The advantages of grounding module Grounding module this product is also commonly known as grounding or grounding network, mainly to help improve the internal conductivity of the grounding conductor to reduce resistivity, the grounding module has good ability and good conductivity, low damage rate and other advantages, is also the "God of protection" of each electricity, the following on the use of grounding module advantages through the following a up to understand the following. Sichuan Sunlight Intelligent Long service life Grounding module using copper clad steel process material made of force is particularly good, long-term buried in the ground will not be a variety of moisture and other elements of corrosion, grounding module metal skeleton used is also processed metal materials, so improve the entire capacity of the service life of up to decades or more. Grounding buried deep Grounding module can be used in a variety of different and underground, and can be buried according to different occasions, in order to meet the low resistance value requirements to a variety of occasions, because the grounding module connection drive way, so can carry out a variety of different connections and use. Strong resistance reduction function Grounding module can be combined with the soil as a whole and can increase the contact area of the grounding body and soil, reduce the contact resistance to improve the efficiency of the grounding module, and grounding module in the use of the process can keep the surrounding soil wetness, grounding module can play a conductive function, reduce the contact resistance resistance resistance value. Wide range of use Grounding module can be used in different soil environment, including different temperature, temperature and PH value or resistivity change conditions of the soil environment, but also suitable for use in a variety of different power, construction, petrochemical, communications and other important industries, so grounding module can be called "omnipotent" grounding conductive materials. Grounding module is resistance reduction supplies. In the grounding ground network resistance can not meet the requirements. With the module and resistance reducing agent to reduce resistance, so that the resistivity of the ground network can be reduced to the ideal value. When the cores of the grounding module are connected in parallel with each other or with the ground, welding is performed. It is required to use the same metal material welding, the sex of the connection. The welding length should be no less than 80mm, and no false welding or leakage. Grounding module processing is very important, first of all, the correct installation of lightning protection grounding module is an important part of the ground network construction, lightning protection grounding module its design at the beginning, has taken into account the ability of the product itself, and the technology into the grounding module products, however, in the lightning protection grounding module installation process, incorrect installation will inevitably produce harm to the product's own materials, thus failing to achieve the use of the effect. In recent years, the gradual adoption of non-metallic grounding module. We are professional grounding module supplier, if you are interested in this, please contact Sichuan Sunlight Intelligent Co.
The minimum acceptable insulation resistance value is calculated using the following formula: Rinsulation= (Vrated + 1 ) x (304.8 / L ) Where: Rinsulation is the minimum acceptable insulation resistance value, in mega-ohms; Vrated is the rated voltage of the cable (typically printed on the cable), in kilovolts; and L is the length of the cable, in meters (if the cable length is in feet, replace the number 304.8 with 1000).
A low voltage (less than 1000 VAC) circuit breaker for 15 A typically has a contact resistance of 0.01 Ohm or less.
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.