Testing Theory of Insulation Resistance Tester
October 31st 2015 Posted at Uncategorized
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Insulation resistance tester is extensively utilized to test engine, motor, electric adapter, attached wires, digital items and also of electric equipment such as cables for control, signal, telecommunication and electricity. Insulation resistance tester is applied to illustrate the change of insulated resistant of electric machines for months and yrs. The insulated resistance can be with giant changes. That would illustrate the possible troubles. Therefore, we might require to rectify the insulation resistance tester from time to time with the ambition to make sure no change of the tester throughout the long-term utility.
Nearly all kinds of insulation resistance tester would applycccm of protecting the ends is to remove the possible stream leakage and optionally reduce the influence to the output resistant gadget to 0.
One of main difficulties to rectify the insulation resistance tester is to find the proper resistance. The 1st requirement should certainly be on adequate precision. And, the resistance level should be big enough to endure the high level of DC stream. Besides, there exists no universal standard for Megger machine manufacturers to apply specific sorts of resistant range. So, users may need to have all kinds of resistance levels. By understanding different kinds of insulation resistance tester goods, users can know different feature testing points of them.
Multifunctional electrical/electronic calibrator cannot be utilized to correct the insulation resistance tester due to the limited voltage they can only deal with. The best voltage is not over 20V. Also, the strategy for composite voltage would be excluded based on the restrain of design cost and size. The rectification of insulation resistance tester applies vertical high-voltage resistant matrix to provide over 500 thousand output resistant levels. In the rectifier of insulation resistance tester, there are 8 ranges of resistances. Each range can provide 4.5-digit stable output. It would be another challenge to collect proper high-voltage resistances and then integrate them into a device. The protector of insulation resistance tester can form a resistance multiplier to efficiently multiplie a known resistance.
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