How to measure the insulation resistance of three-phase pump?
Test content, construction site, main test of electrical equipment, facilities and power, insulation resistance of lighting lines.
The insulation resistance of test instruments, test equipment, or circuits must be checked using a euro watch (shake table) and cannot be tested by a multimeter. The ohmmeter is an indicating instrument for testing large resistance with high voltage and easy to use. The scale unit is megohm, represented by the mu omega. In actual work, according to the object to be measured to choose different voltage levels and resistance measuring range of instrument. The principle of choosing the measuring range of the ohm meter is that the measuring range can not be too much, and the insulation resistance value is exceeded, so as to avoid greater errors. Construction site is generally measured below 500V of electrical equipment or wiring insulation resistance. Therefore most of the 500V resistance measurement range 0----250 Mu Omega megameter. There are three terminals: L (line), E (grounding), G (shielding), these three terminals are selected according to different measurement objects.
