KFU 2-/4-
27
3.9
KFU 4- (18.5 to 30.0 kW, 400 V)
Type
KFU 4-
-27 -29 -31
Construction Size
5
Output, motor side
Recommended motor shaft power
P
kW
18.5 22.0 30.0
Output current
I
A
40.0 45.0 60.0
Long-term overload current (60 s)
I
A
60.0 67.5 90.0
Short-time overload current (1 s)
I
A
80.0 90.0 120.0
Output voltage
U
V
Maximum input voltage, three-phase
Protection
-
-
Short circuit / earth fault proof
Rotary field frequency
f
Hz
0 ... 1000, depending on switching frequency
Switching frequency
f
kHz
2, 4, 8
Output, brake resistor
Min. brake resistance
R
Ω
16
Recommended brake resistor
(U
dBC
= 770 V)
R
Ω
26 22 16
Input, mains side
Mains current
2)
3ph/PE
I
A
42.0 50.0
58.0
1)
Mains voltage
U
V
320 ... 528
Mains frequency
f
Hz
45 ... 66
Fuses 3ph/PE
I
A
50 63
UL type 600 VAC RK5, 3ph/PE
I
A
50 60
Mechanics
Dimensions
HxWxD mm
250x200x260
Weight (approx.)
m
kg
8
Degree of protection
- -
IP20
(EN60529)
Terminals
A
mm
2
up to 25
Form of assembly
- -
vertical
Ambient conditions
Energy dissipation
(2 kHz switching frequency)
P
W
445 535 605
Coolant temperature
T
n
°C
0 ... 40 (3K3 DIN IEC 721-3-3)
Storage temperature
T
L
°C
-25 ... 55
Transport temperature
T
T
°C
-25 ... 70
Rel. air humidity
-
%
15 ... 85, not condensing
If required by the customer, the switching frequency may be increased if the output current is reduced at the
same time. Comply with the applicable standards and regulations for this operating point.
Output current
3)
Switching
frequency
Frequency inverter nominal power
2 kHz
4 kHz
8 kHz
18.5 kW
40.0 A
40.0 A
40.0 A
22 kW
45.0 A
45.0 A
45.0 A
30 kW
60.0 A
1)
60.0 A
1)
60.0 A
1)
1)
Three-phase connection requires a commutating choke.
2)
Mains current with relative mains impedance
≥
1% (see chapter„Electrical installation“)
3)
Maximum current in continuous operation
