Rockwell-automation 20D PowerFlex 700S Phase II Drive Frames 1...6 Ins User Manual download pdf (Page 33)

Rockwell Automation Publication 20D-IN024C-EN-P - July 2013 33

PowerFlex 700S Adjustable Frequency AC Drive - Phase II Control

AC Supply Source Considerations

PowerFlex drives are suitable for use on a circuit capable of delivering up to a

maximum of 200,000 rms symmetrical amperes, 600 volts with recommended s/

circuit breakers.

If a residual current detector (RCD) is used as a system ground fault monitor,

only Type B (adjustable) devices should be used to avoid nuisance tripping.

Input Power Conditioning

Certain events on the power system supplying a drive can cause component

damage or shortened product life. These conditions are divided into two basic

categories:

1. All Drives

• The power system has power factor correction capacitors 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 6000

volts. These spikes could be caused by other equipment on the line or by

events such as lightning strikes.

• The power source has frequent interruptions.

2. 5 Hp or Less Drives (in addition to “1” 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, it is recommended that the user 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. The impedance

can be calculated using the information supplied in Wiring and Grounding

Guidelines for Pulse Width Modulated (PWM) AC Drives, publication

DRIVES-IN001

Single-Phase Input Power

The PowerFlex 700S drive is typically used with a three-phase input supply.

Single-phase operation of the drive is not currently rated under the UL508C

listing. Rockwell Automation has verified that single-phase operation with

output current derated by 50% of the three-phase ratings identified in the Fusing

and Circuit Breakers tables on page 44

will meet all safety requirements.

ATTENTION: To guard against personal injury and/or equipment damage

caused by improper fusing or circuit breaker selection, use only the

recommended line s/circuit breakers specified in Fusing and Circuit Breakers on

page 44

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Rockwell-automation 20D PowerFlex 700S Phase II Drive Frames 1...6 Ins User Manual Page 33