Annex A; Overload Characteristic; Overload Protection In The Lower Speed Range; Figure 15: Overload Characteristic - KEB COMBIVERT F5 Instruction Manual

A.

Annex A

A.1

Overload characteristic

Time [s]
300
270
240
210
180
150
120
90
60
30
0 105 110 115 120 125 130 135 140 145 150 160
In this range the characteristic declines dependent on the overcurrent limit
(see unit identification).
Figure 15:
On exceeding a load of 105% the overload integrator starts. When falling below the integrator
counts backwards. If the integrator achieves the overload characteristic that corresponds to
the inverter, the error E.OL is triggered.
A.2

Overload protection in the lower speed range

(only operating mode MULTI and SERVO)
OC-tripping current
Short time current limit
Start of overload inte-
grator at 105%
Stand still current
(see technical data)
Figure 16:
A PT1 element (τ = 280 ms) starts if the permissible current is exceeded. After its sequence of
operation the error E.OL2 is triggered.
Overload characteristic
Load [%]
Overload protection in the lower speed range
170 180 190 200 210 220
E.OL2
Min. frequency at continuous full load
(see technical data)
Annex A
Load [%]
E.OL
f [Hz]
27