dU/dt output Filters for 3-phase frequency inverter
FMAC - 0A Series, Protection Class I
Nominal current:
Rated voltage UR (Umax):
Voltage rise rate dU/dt:
Leakage current:
Test voltages:
Application class:
Inrush current:
8 - 32 A @ ϑ
ϑa 40°C
550 V 50/60 Hz
≤ 500 V/µs
Standard
L → E 3 kVDC, 2 sec
L → L 2.25 kVDC, 2 sec
25/100/21 acc. to IEC 60068-1
1.5 x IN 1 min. per hour
Approvals obtained
or pending:
TIMONTA dU/dt output filters reduce the voltage rise rate of
inverter output voltage and limits the peak voltage, protecting the
motor winding.
Inverters are powerfull semiconductor devices working in Pulse Width
Modulation (PWM), generating very high edge stepness of its output
voltage (ca. 3000V/µs).
This brings to several disadvantages: overheating and damage of motor
windings / bearings, high electromagnetic radiated disturbances (EMI)
and also acoustic noise.
• Standard versions include insulated safety screw terminals (IP 20)
• Key features of this dU/dt output filter range include:
− motors can be fed through long cables
− enhancement of the system efficiency
− reduction of EMI, increased EMC performances
− increase the system reliability
− 550 Vac rated voltage for world wide applications
These disadvantage bring to oversizing the motor and overcost due to
the use of screened cables.
Timonta dU/dt filters reduce the voltage rise rate down to 500V/µs
and limits the peak voltage under 1000V peak (at 550 Vac output
voltage).
• Range of use:
− inverter switching frequency: 4-16kHz
− max. lenght of motor cable: 40m
− the power dissipation of the filter depends upon the switching
frequency of the inverter, the lengh of the motor cable and the
voltage. The given values refer to 20m cable and 4kHz switching
frequency. For other conditions check the application range table and
inquire by Timonta.
− Compact cases
Technical Data
Type
IN (1)
@ ϑa 40°C
FMAC-0A24-0813
FMAC-0A27-1613
FMAC-0A40-2513
FMAC-0A38-3213
UR
(Umax)
[A]
[V]
3 x 8
3 x 16
3 x 25
3 x 32
550
550
550
550
L
Resistance
L-L’
-30%+50%
± 15%
[mH]
[mΩ]
N
3
3
3
3
x
x
x
x
0.2
0.2
0.2
0.2
22.0
11.6
9.2
9.2
Max. leakage current
@ 50 Hz
In 3-phase
systems (2)
440 VAC
[mA]
< 0.5
< 0.5
< 0.5
< 0.5
(1) Current derating depening upon application conditions
(2) Measured according to IEC 60950 - 5.2.4 - 5.2.5
Circuit diagram
Drive Rating Converter
Motor rating
[PS / HP]
[kW]
5
10
15
20
90
3.7
7.5
11
15
Recommended Filter Type
Converter rating
[kVA]
to
to
to
to
6.8
12.2
20
26
Recommended filter
IN [A]
8
16
25
32
C
Case
Terminal
blocks
±10%
2
[nF]
4.7
4.7
4.7
4.7
[mm ]
24
27
40
38
4
4
6
10
Block diagram
Voltage at the motor
Application range with output voltage 400 VAC, @Ta
40°C, function of type, motor cable length, switching frequency and duty cycle.
Type
Motor cable length
[m]
at inverter switching frequency
continuous operation
FMAC-0A24-0813
FMAC-0A27-1613
FMAC-0A40-2513
FMAC-0A38-3213
4 kHz
8kHz
duty cycle
25%, 60min.
16kHz (*)
30
30
40
40
10
10
20
20
10
10
20
20
(*) These filters can also work at 16 kHz switching frequency with same cable
length specified for 8 kHz, but with reduced duty cycle (25%, 60min.) or
with filter cooling to limit the case temperature to 85°C max.
Mounting instructions
The filter case has hot points when working: do not mount it near to inflammable objects. Leave free space around it for air circulation and mount it
on a metal surface.
Case 24
Case 27
Case 40
Case 38
91