GUID-6E9B7247-9009-4302-A79B-B326009ECC7A V2 EN
Figure 381: Typical motor-starting and capability curves
Setting of Cumulative time Lim
Cumulative time Lim is calculated by
t n t margin
si
∑
= − × +( )1
GUID-0214B677-48D0-4DD4-BD1E-67BA9FD3C345 V1 EN (Equation 134)
n
specified maximum allowed number of motor start-ups
t start-up time of the motor (in seconds)
margin safety margin (~10...20 percent)
Setting of Counter Red rate
Counter Red rate is calculated by
GUID-E7C44256-0F67-4D70-9B54-1C5042A151AF V1 EN (Equation 135)
t
specified start time of the motor in seconds
t
reset
duration during which the maximum number of motor start-ups stated by the manufacturer can be
made; time in hours
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 759
Technical Manual
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