Marsh Bellofram Diversified Electronics Division PRT Series Phase Rotation Tester - Marsh Bellofram - #1

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PRT Series Diversified Electronics atcdiversified.com 800.727.5646 278Special Controls // PRT Series The PRT-100 is a hand-held tester that takes the guesswork out of connecting a 3-phase motor. The direction of rotation of a motor depends on phase sequence of the power line connections. If the sequence is reversed, the motor will run in the wrong direction, possibly damaging the equipment connected to the motor. The PRT-100 identifies the leads of a three-phase motor and detects the sequence of a three-phase power line. Once the motor and line leads are properly identified, the motor can be wired so that it turns in the desired direction on the first try. The unit also detects phase loss and no voltage conditions. To identify the leads of a three-phase line, connect the tester to the energized line and press the test button. Either the normal or reverse LED will glow. If the reverse LED glows, switch two leads and press the test button again. The normal LED should now glow. Label the three-phase line conductors according to the marking on the tester. If the loss LED glows, a phase loss or no voltage condition exists, and the normal and reverse LEDs are meaningless. Correct the loss condition and retest. To identify the leads of a three-phase motor, connect the tester to the de-energized motor, turn the rotor in the desired direction, and press the test button. If the reverse LED glows, switch two leads and repeat. The normal LED should now glow. Label the motor leads according to the markings on the tester. NOTE: the loss LED will glow during motor testing. This is normal since the turning motor generates less than 20 volts. De-energize the three-phase line and connect the line conductors to the matching motor leads. When the motor is energized, it will run in the desired direction. P h a s e R o t a t i o n T e s t er \\\OPERATION \\\DIMENSIONS (INCHES) \\\SPECIFICATIONS SUPPLY VOLTAGE 20 to 600 VAC, 50/60/400 Hz ABSOLUTE MAXIMUM VOLTAGE 700 VAC, Phase-to-Phase BATTERY 9V, Included ISOLATION 3000 VAC, Leads to User ROTATION/ SEQUENCE Red Phase Loss/No Voltage Yellow Low Battery OPERATOR CONTROL Momentary Test Button INDICATORS Green Normal Rotation/Sequence Red Reverse TEMPERATURE RATING Operate 32° to 113°F (0° to +45°C) Storage -40° to 140°F (–40° to +60°C) RESPONSE TIMES 100ms LEADS 18", color coded, battery clip type DIMENSIONS 3.75 x 2.625 x 1.5 inches WEIGHT NET: 4.16 oz \\\ORDERING INFORMATION MODEL NUMBER DESCRIPTION PRT-100 Phase Rotation Tester