KEB COMBIVERT S6 Series, Instructions For Use Manual

Page: 37 / 66

3.3.7 Dc link / braking transistor function
Unit size 12 13 14
DC link rated voltage @ U
N
= 400 V U
N_dc
/ V 565
DC link rated voltage @
U
N
= 480 V
U
N_dc_UL
/ V 672
DC link voltage working voltage range U
in_dc
/ V 260...750 ±0
DC switch-off level „Error! Underpotential“ U
UP_dc
/ V 240
DC switch-off level „Error! Overpotential“ U
OP_dc
/ V 840
Rated current DC @ U
in_dc
= 565 V I
in_dc
/ A 16 20 26
Rated current DC @ U
in_dc
= 680 V I
in_dc_UL
/ A 13 19 22
Rated current DC @ U
out_dc
= 565 V I
out_max_dc
/ A 16 20 26
Rated current DC @ U
out_dc
= 680 V I
out_max_dc_UL
/ A 13 19 22
DC switching level braking resistor
1)
U
B_dc
/ V 780
Max. braking current I
Bmax
/ A 28 34 34
Min. brake resistance value R
Bmin
/ Ω 33 25 25
DC link capacity
C
/ uF 470 560 680
Protection function for braking transistor (GTR7)
2)
—
Table 20: DC link / braking transistor function of the 400 V units
1)
The DC switching level for the braking transistor is adjustable. The default value is the value spec -
ified in the table.
2)
No protective function, => “Wiring of an intrinsically safe braking resistor”.
NOTICE
Destruction of the drive converter if the value has fallen below the
minimum brake resistance value
► The minimum brake resistance value must not fall below!
Net
Rectifier
DC link
Inverter
Braking
transistor
(GTR7)
Motor
DC Out
Braking
resistor
DC in
I
in
I
N
I
out_dc
I
B
I
in_dc
Figure 7: Block diagram of the energy flow
Activation of the braking transistor function
The function must be activated with parameter "is30 braking transistor func-
tion" in order to use the braking transistor (GTR7).
Further information can be found in the download area of
www.keb.de
under
the search term „
S6 Programming Manual“
.
37
UNIT DATA