Rockwell-automation 20C PowerFlex 700H Drives Programming Bedienungsanleitung PDF herunterladen (Seite 90)

90 Rockwell Automation Publication 20C-PM001F-EN-P - March 2012

Appendix B Application Notes

[Motor OL Hertz]. For all settings of [Motor OL Hertz] other than zero, the

overload capacity is reduced to 70% at an output frequency of zero.

[Motor NP FLA] is multiplied by [Motor OL Factor] to select the rated current

for the motor thermal overload. This can be used to raise or lower the level of

current that will cause the motor thermal overload to trip. The effective overload

factor is a combination of [Motor OL Hertz] and [Motor OL Factor].

Changing Overload Hz

0102030405060708090100

% of Base Speed

Continuous Rating

OL Hz = 10

OL Hz = 25

OL Hz = 50

100

120

Changing Overload Factor

0102030405060708090100

% of Base Speed

Continuous Rating

OL % = 1.20

OL % = 1.00

OL % = 0.80

100

120

140

Note: This graph represents a motor with a speed range of 2:1.

1 2 ... 85 86 87 88 89 90 91 92 93 94 95 ... 115 116

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Rockwell-automation 20C PowerFlex 700H Drives Programming Bedienungsanleitung Seite 90