Overload And Derating; Figure 1: Maximum Load And Derating Depending On The Switching Frequency - KEB COMBIVERT G6 Instructions For Use Manual

TeCHNICAL DATA 400V DeVICeS
The service life of the drive controller with voltage DC link depends on the current load
of the electrolytic capacitors in the DC link. The use of mains chokes can increase the
service life of the condensators to a considerable extent, especially when connecting to
„hard" power systems or when under permanent drive load (continuous duty).
The term "hard" power system means that the nodal point power (S
very high (>> 200) compared to the rated apparent output power of the drive controller
(S
out
S
net
k = –––– >> 200
S
out

3.2.1 Overload and derating

I / %
N
220
I
(13/14.G6)
OC
200
I I
(13/14.G6)
HSR
180
160
I
(15.G6)
HSR
140
120
100
80
60
f (0Hz)
0
Legend
I Rated current
N
Overcurrent
I
OC
Hardware current limitation
I
HSR
Figure 1: Maximum load and derating depending on the switching frequency
The technical data are for 2/4-pole standard motors. With other pole numbers
the drive controller must be dimensioned onto the rated motor current. Contact
KEB for special or medium frequency motors.
).
2 MVA (supply transformer)
e.g. k = –––––––––––––––––––––
6.6 kVA (12G6)
13.G6 (4/8 kHz) & 14/15.G6 (4kHz)
(15.G6)
OC
f (6Hz)
d
= 303 ––> Choke required
14.G6 (8 kHz)
15.G6 (8 kHz)
I
N
f / Hz
out
f Output frequency
out
Standstill
f
0
Corner frequency
f
d
) of the mains is
net
29