KEB COMBIVERT F5 BASIC - Page 199

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KEB COMBIVERT F5
Name: Basis
18.04.02
6
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Kapitel
Functional DescriptionProtective Functions
Description for F5-S The internal overload counter counts downwards (100 % to o % in 5 s) with overload
factors < 300 %. Above 300 % it is counted upwards according to following
characteristic.
The tripping time is 200...500 ms; at overload factors above 500 % it is always 200
ms. If an error is triggered, it can be reset immediately. However, in this case the
tripping time can be very short, since the counter decrements only slowly.
Bild 6.7.8.c Tripping time for F5-S
5,5
0,1
0,2
0,3
0,4
0,5
0,6
2,5 3 3,5 4 4,5 5
Is/Id
s
Formeln für den
Überlastfaktor
Inverter apparent current (ru.15)
Overload factor = ----------------------------------------
Rated current
(Motor rated current (dr.23) - Standstill current (dr.28)) • Real speed
Continuous current = ---------------------------------------------------------------------------------------------- + Standstill current (dr.28)
Motor rated speed (dr.24)
Continuous current = Motor rated current (dr.23), if real speed > Motor rated speed (dr.24)
A level of 0...100 % of the tripping time is adjustable with Pn.15. On reaching the
adjusted level, the switching condition „OH2-warning“ is set (also see „Digital outputs“).
The response to the warning signal is defined with Pn.14.
Motorschutzfunktion Pegel
(Pn.15)
Motorschutzfunktion Reaktion
(Pn.14)
This parameter determines the behaviour of the drive if the motor protective function
responds. The function is described in Chapter 6.7.6.