Annex A; Overload Characteristic; Overload Protection In The Lower Speed Range; Calculation Of The Motor Voltage - KEB Combivert F5 series Instruction Manual

Annex

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
The characteristic declines device-dependently in this range (see unit identification).
On exceeding a load of 105% the overload integrator starts. When falling below the integrator counts backwards.
Error E.OL is triggered if the integrator achieves the inverter appropriate overload characteristic.
A.2

Overload protection in the lower speed range

(only for F5-M and F5-S)
OC-tripping current
Short time current limit
Start of overload integrator at
Stand still current
(see technical data)
A PT1-element (τ = 280 ms) starts if the permissible current is exceeded. After its sequence of operation error
E.OL2 is triggered.
A.3

Calculation of the motor voltage

The motor voltage for dimensioning of the drive is depending on the used components. The mains voltage redu-
ces according to the following table:
Mains choke Uk
Inverter open loop
Inverter closed loop
Motor choke Uk
Non-rigid supply system
Characteristic 1
Load [%]
170 180 190 200 210 220
Load [%]
105%
4 %
4 %
8 %
1 %
2 %
E.OL2
Min. frequency at continuous full load
(see technical data)
Example:
Closed loop inverter with mains- and motor choke at non-
rigid supply system:
400 V mains voltage - 15 % = 340 V motor voltage
E.OL
f [Hz]
GB - 27