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Since electricity is a natural force that exists in our world, it didn't have to be invented. It did, however, have to be discovered and understood. Most people give credit to Benjamin Franklin for discovering electricity.
A power quality analyzer to measure the power in W, kWh or to analyze and measure harmonics. This power analyzer is a multi-function power analyzer device that measures precisely direct current, alternating current, AC-voltage, DC-voltage the intensity of DC or AC, phase rotation and idle, apparent and effective power. The reading of AC power is considered the real value and has a maximum range of 6000 Watts. While a reading is being taken, the polarity changes automatically, if negative values are taken then a minus sign will appear on the device display
Most facilities have grounded electrical systems, so that in the event of a lightning strike or utility overvoltage, current will find a safe path to earth. A ground electrode provides the contact between the electrical system and the earth. To ensure a reliable connection to earth, electrical codes, engineering standards, and local standards often specify a minimum impedance for the ground electrode. The International Electrical Testing Association specifies ground electrode testing every three years for a system in good condition with average up-time requirements.