Insulation resistance testers, commonly referred to as digital megohmmeters or high resistance meters, are widely used to measure generators, motors, power transformers, wiring, electrical appliances, and other electrical devices such as control, signal, communication, and power cables. Insulation resistance. They are often used in routine maintenance procedures to indicate changes in insulation resistance of the motor over months or years. A large change in insulation resistance may indicate a potential failure. Therefore, it is necessary to periodically calibrate the megohmmeter to ensure that the meter itself does not change over time.
Digital megohmmeters are essential instruments for power, post and telecommunications, communications, electromechanical installation and maintenance, and industrial enterprises that use electricity as an industrial power or energy source. It is suitable for measuring the resistance value of various insulating materials and the insulation resistance of transformers, motors, cables and electrical equipment.
working principle:
The digital megohmmeter consists of medium and large scale integrated circuits. This watch has large output power, high short-circuit current value and many output voltage levels (four voltage levels). The working principle is that the DC high voltage generated by the DC/DC conversion of the battery in the machine is passed from the E pole to the L pole through the tested product, thereby generating a current from the E to the L pole, and is completed by the I/V conversion through the divider. The calculation directly displays the measured insulation resistance value by the LCD.
If a multimeter is used to measure the insulation resistance of the device, then the measured value of the insulation resistance at low voltage is not really reflected in the insulation performance under high voltage conditions. The difference between a digital megohmmeter and a multimeter is that it has a high voltage power supply with a voltage of 500 to 5000V. Therefore, measuring the insulation resistance with a digital megger can obtain the insulation resistance value in accordance with the actual working conditions.
Dear Customer:
Thank you for your attention to our products. In addition to this product introduction, the company also has insulation ladder, high voltage insulation pad, cable fault tester, high voltage measuring instrument, insulated boots gloves pressure test device, electric safety tool cabinet, etc. Introduction, if you are interested in our products, please contact us. Thank you!
Polyester patio screens have gained popularity among homeowners seeking a versatile and durable solution for their outdoor spaces. These screens are crafted from high-quality polyester material, known for its strength and resistance to wear and tear. Polyester patio screens effectively keep out insects and pests while allowing fresh air and natural light to permeate through. With their fine mesh construction, they provide excellent visibility and ventilation, creating a comfortable and inviting atmosphere. Additionally, polyester screens are easy to install and maintain, making them a convenient choice for patio enclosures. Whether you're hosting a gathering or simply enjoying a quiet moment outdoors, polyester patio screens offer a reliable and aesthetically pleasing option.
Polyester pool screen,Pool enclosure, Insect protection
Jinwu Glass Fiber Co., Ltd , https://www.jwnetwindows.com