Admin What is the purpose of a megohmmeter?
Megohmmeters provide a quick and easy way to determine the condition of the insulation on wire, generators, and motor windings. A megohmmeter is an electric meter that measures very high resistance values by sending a high voltage signal into the object being tested.
What is the purpose of insulation test?
An insulation resistance (IR) test measures the total resistance between any two points separated by electrical insulation. The test, therefore, determines how effective the dielectric (insulation) is in resisting the flow of electrical current.
What is a megohmmeter test?
A megohmmeter, or megger as it is more commonly known, is an electrical test instrument designed to test extremely high resistances by producing a DC (direct current) voltage of between 300 and 15,000 volts. Megohmmeters produce this high voltage via battery powered internal circuitry or a manually operated generator.
What is an insulation resistance tester used for?
Portable insulation resistance testers and megohmmeters are designed to help prevent hazards such as electric shock and short-circuits caused when the insulation in electrical devices, parts, and equipment used in industrial plants, buildings, and other settings degrades over long periods of use.
Why is the test for insulator necessary in power system?
When installing new electrical machinery or equipment, testing insulation resistance is important for two reasons. First, it ensures that the insulation is in adequate condition to begin operation. Due to fluctuating factors like moisture and temperature, insulation testing is mostly based on relative measurements.
Can you apply a megohmmeter to electronics?
Megohmmeter measurements can now be more accurate, rapid and safer than ever before. A considerable number of electronics personnel working throughout the electrical industry are military trained. A technician uses a hand-cranked megohmmeter to check the insulation resistance of motor windings.