GUID-6E9B7247-9009-4302-A79B-B326009ECC7A V2 EN
Figure 140:
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 30)
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
∆
t
t
t
s
reset
∑
=
GUID-E7C44256-0F67-4D70-9B54-1C5042A151AF V1 EN
(Equation 31)
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
Section 4
1MRS757454 D
Protection functions
298
611 series
Technical Manual
Summary of Contents for Relion 611 Series
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