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The contact-free rotating field and rotation tester TV 411 shows the phase sequence and direction of rotary field of the outer conductor and is particularly suitable for service tasks in motor installations and multi-phase networks. The contact-free measurement with the color insulated terminals speeds up the service use and minimizes the risk of the beruhrens electrically active conductors. The built-in rotation tester is determined by measuring the alternating magnetic field also contact the direction of rotation of the motor shaft.This text is machine translated.