
8520-32MB1 A-B Servo Controller
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IN STOCK8520-32MB1 A-B Servo Controller
Some events on the power system supplying a drive can cause component damage or shortened product life. These events are divided into two basic categories that are described: • All Drives – The power system has power factor correction capacitors that are switched in and out of the system, either by the user or by the power company. – The power source has intermittent voltage spikes in excess of 6000V. These spikes could be caused by other equipment on the line, or by events such as lightning strikes. – The power source has frequent interruptions. • 5 Hp or Less Drives (in addition to all drives above) – The nearest supply transformer is larger than 100 kVA, or the available short circuit (fault) current is greater than 100,000 A. – The impedance in front of the drive is less than 0.5%. If any or all of these conditions exist, we recommend that you install a minimum amount of impedance between the drive and the source. This impedance could come from the supply transformer itself, the cable between the transformer and drive, or an additional transformer or reactor. To calculate the impedance, use the information that is supplied in the Wiring and Grounding Guidelines for Pulse Width Modulated (PWM) AC Drives, publication DRIVES-IN001.
Single-phase Input Power The PowerFlex 70 drive is typically used with a three-phase input supply. Underwriters Laboratories (UL) lists the drive to operate on single-phase input power. Single-phase operation provides 50% of the three-phase rated current. See 208/240V AC Single-phase Input Drive Ratings and Input Protection Devices on page 24 through 600V AC Single-phase Input Drive Ratings and Input Protection Devices on page 26. Generator Input Power Contact technical support for details on how to power a drive properly when using generator power. See Rockwell Automation Support on the back cover
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