An Earth Resistance Tester and a Megger are both instruments utilized in electric screening, but they offer various purposes and operate on various concepts.
Below’s a contrast in between the two:
Earth Resistance Tester:
Purpose: An Earth Resistance Tester is especially designed to measure the resistance of the planet or ground electrode systems. It is made use of to make certain that the resistance of the grounding system is within appropriate restrictions for electrical security and correct operation of electric systems.
Operation: Planet resistance testers usually run by infusing a well-known current into the ground with the grounding system and measuring the resulting voltage decline. The resistance is then computed making use of Ohm’s Regulation (Resistance = Voltage/ Current).
Applications: Planet resistance testers are typically utilized in electric setups, lightning security systems, telecommunications, and industrial facilities to verify the integrity and efficiency of the grounding system.
Megger:
Objective: A Megger is a general-purpose instrument utilized to measure insulation resistance in electric systems. It is mainly utilized to examine the insulation problem of cords, wires, electric motors, transformers, and other electric devices by determining the resistance in between conductors and ground.
Procedure: A Megger runs by applying a high DC voltage to the insulation under examination and gauging the resulting leakage current. The tool calculates the insulation resistance based upon the proportion of used voltage to leak current.
Applications: Meggers are widely used in electrical upkeep, commissioning, and troubleshooting tasks to identify insulation issues, deterioration, or mistakes in electric equipment and electrical wiring.
In summary, the primary difference between an Earth Resistance Tester and a Megger lies in their specific applications and the parameters they measure. Planet resistance testers concentrate on determining the resistance of the ground or grounding system, while Meggers are made use of to determine insulation resistance in electrical insulation and elements. Both tools are vital tools for guaranteeing electrical safety and security and reliability in different applications.
