Three-phase dv/dt Reactor for Efficient Motor Protection
Load Reactors RWK 305
Reduction of drive output voltage dv/dt
Reduction of motor temperature
Increase of motor service life
Approvals
Compact and economic open frame design
Standard catalog reactors up to 1100 A
UL rated materials used
(UL508C up to 182 A. For use with AC or DC drives
(power conversion equipment) only
Features and benefits
Efficient reduction of high output voltage dv/dt
from IGBT motor drives.
Protection of motor coil insulation from premature
aging and destruction.
Significantly increased servie life of electric motors.
High reliablility and secured production up time for
mission critical applications.
Reduced converter pulse load.
Less interference propagation towards neighboring
equipment of lines.
„Output filter“ with low impedance, ideal for
processes requiring exceptional pre- cision and
reproducibility of movements.
Technical specifications
Maximum continuous operating voltage
Motor frequency
Switching frequency
Rated currents
Motor cable length
3 x 500/288 VAC
2 to 16 kHz
Vacuum impregnation for reduced humming noise
and high durability.
Typical applications
Servo drives
Close loop vector drives
Impedance (uk)
Typical dv/dt reduction
4 to 1100 A @ 40°C
30 m max. @ 16 kHz (derating curve next page)
0.8 % @ 400 VAC, 50 Hz & rated current
≥ factor 5
P –> E 3000 VAC for 3 sec
P –> P 3000 VAC for 3 sec
Motor drive applications with short motor cables
Machinery comprising servo or torque motors
Robots
Pick and place machines
High potential test voltage
Protection category
Overload capability
Temperature range (operation and storage)
Insulation class
IP00 (KL types according to VBG 4)
2 x rated current at switch on for 30 seconds
Typical electrical schematic
1.5 x rated current for 1 minute, once per hour
-25 °C to +100 °C (25/100/21)
T40/N (200 °C) for ≤ 182 A types
T40/F (155 °C) for ≥ 230 A types
Flammability corresponding to
Design corresponding to
MTBF @ 40°C/400V (Mil-HB-217F)
UL 94 V-2 or better
EN 61558-2-20 (VDE 0570-2-20), UL508C,
CSA C22.2 NO.14
> 500,000 hours
2
Load Reactors
Schaffner Group
Datasheets
2014
Reactor selection table
Reactor
Rated current
@ 40 °C
[A]
4
power rating*
Typical motor
[kW]
inductance
Nominal
[mH]
power loss**
Typical
[W]
Input/Output
connections
Weight
Total
1.2
[kg]
RWK 305-4-KL
RWK 305-7.8-KL
RWK 305-10-KL
RWK 305-14-KL
RWK 305-17-KL
RWK 305-24-KL
RWK 305-32-KL
RWK 305-45-KL
RWK 305-60-KL
RWK 305-72-KL
RWK 305-90-KL
RWK 305-110-KL
7.8
10
14
17
24
32
45
60
72
110
124
143
156
170
182
230
280
330
400
500
600
680
790
1100
910
90
1.5
4
3
5.5
7.5
11
15
22
30
37
45
55
55
75
75
90
132
160
160
200
250
355
400
450
500
630
90
0.588
0.754
0.42
1.47
22
30
25
34
KL
KL
KL
KL
1.8
1.2
2.2
0.245
0.184
0.131
0.098
0.082
0.065
0.346
45
55
60
65
70
75
38
KL
KL
KL
KL
KL
KL
KL
2.5
3.9
6.1
6.1
6.1
7.4
KS
KS
KS
KS
KS
KS
KS
KS
S
S
S
S
S
S
S
2.5
RWK 305-124-KS
RWK 305-143-KS
RWK 305-156-KS
RWK 305-170-KS
RWK 305-182-KS
RWK 305-230-KS
RWK 305-280-KS
RWK 305-330-KS
RWK 305-400-S
RWK 305-500-S
RWK 305-600-S
RWK 305-680-S
RWK 305-790-S
RWK 305-910-S
*
**
RWK 305-1100-S
0.053
0.047
0.041
0.038
0.035
0.032
0.026
0.021
0.018
0.015
0.012
0.009
0.007
0.006
0.005
0.01
110
115
120
130
140
180
220
240
330
380
340
410
590
740
760
90
KL
8.2
10.7
10.7
10.7
16
22
29
32
34
35
38
43
49
66
8.2
37
General purpose four-pole (1500 r/min) AC induction motor rated 400 V/50 Hz.
Exact value depends upon the motor cable type and length, switching frequency, motor frequency and further stray parameters within the system.
Reactor derating
The maximum admissible motor cable length depends mainly on the switching frequency and the drive output voltage. The applicable value for a given application
can be found in the derating curve below.
3
Load Reactors
Schaffner Group
Datasheets
2014
Mechanical data
4 to 45A types
60 to 110 A types
124 to 330 A types
400 to 1100 A types
4
Load Reactors
Schaffner Group
Datasheets
2014
Dimensions
A
4 and 7.8 A
10 A
14 A
17 A
24 A
32 A
45 A
90 A
60 and 72 A
110 A
124 A
143 A
182 A
230 A
280 A
330 A
400 and 500 A
600 and 680 A
790 A
910 A
156 AND 170 A
B
max. 60
max. 70
max. 70
max. 75
max. 75
max. 110
max. 125
max. 115
max. 130
max. 180
max. 180
max. 180
max. 180
220
235
240
220
230
218
228
250
max. 95
C
max. 115
max. 115
max. 135
max. 135
max. 135
max. 170
max. 190
max. 190
max. 225
max. 220
max. 160
max. 160
max. 160
max. 185
220
220
220
325
325
355
355
380
D
56
100
100
100
130
130
130
170
170
170
170
170
175
190
190
190
190
190
240
240
310
56
E
34
43
45
55
55
56
72
70
57
67
67
77
77
119
133
135
119
128
136
148
144
95
F
4.8 x 9
4.8 x 9
5x8
5x8
8 x 12
5x8
G
2.5 mm2
2.5 mm2
2.5 mm2
10 mm2
4 mm2
2.5 mm2
100
100
125
125
125
155
155
155
190
190
190
190
190
210
240
240
240
240
240
300
300
360
8 x 12
8 x 12
8 x 12
8 x 12
8 x 12
8 x 12
8 x 12
8 x 12
10 mm2
16 mm2
35 mm2
35 mm2
Ø8
Ø8
Ø 10
Ø 10
Ø 12
Ø 12
Ø 12
Ø 11
2 x Ø 11
2 x Ø 11
2 x Ø 11
Ø 14
11 x 15
11 x 15
11 x 15
11 x 15
11 x 15
11 x 15
11 x 15
11 x 15
1100 A
All dimensions in mm; 1 inch = 25.4 mm
Tolerances according: ISO 2768-m / EN 22768-m
Please visit www.schaffner.com to find more details on filter connectors.
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