nord NORDAC PRO SK 511E Series - Combination of Brake Resistors

2 Assembly and installation
BU 0505 EN-3021 41
Frequency inverter BW
1)
Frequency inverter BW
1)
U
[V]
P
100%
[kW]
R
min
[Ω]
SK 5xxE- U
[V]
P
100%
[kW]
R
min
[Ω]
SK 5xxE-
115
0.25
240
250-112-
1 / -
400
0.55
390
550-340-
9 / -
0.37
190
370-112-
1 / -
0.75
300
750-340-
9 / -
0.55
140
550-112-
2 / -
1.1
220
111-340-
10 / -
0.75
100
750-112-
2 / -
1.5
180
151-340-
10 / -
1.1
75
111-112-
2 / -
2.2
130
221-340-
10 / -
230
0.25
240
250-323-
1 / -
3.0
91
301-340-
11 / 13
0.37
190
370-323-
1 / -
4.0
74
401-340-
11 / 13
0.55
140
550-323-
2 / -
5.5
60
501-340-
12 / 14
0.75
100
750-323-
2 / -
7.5
44
751-340-
12 / 14
1.1
75
111-323-
3 / -
11.0
29
112-340-
15 / -
1.5
62
151-323-
3 / -
15.0
23
152-340-
15 / -
2.2
46
221-323-
3 / -
18.5
18
182-340-
16 / -
3.0
35
301-323-
4 / 5
22.0
15
222-340-
16 / -
4.0
26
401-323-
4 / 5
30.0
9
302-340-
17 / -
5.5
19
501-323-
6 / -
37.0
9
372-340-
17 / -
7.5
14
751-323-
6 / -
45.0
8
452-340-
18 / -
11.0
10
112-323-
7 / -
55.0
8
552-340-
18 / -
15.0
7
152-323-
8 / -
75.0
6
752-340-
19 / -
18.5
6
182-323-
8 / -
90.0
6
902-340-
19 / -
110
3.2
113-340-
19 / -
132
3
133-340-
20 / 21
160
2.6
163-340-
21 / 20
1)
Standard brake resistor according to Table (chapter 2.6.1), "Standard type / Alternative type (if available)“
Special brake resistors must be planned if higher brake powers occur (steeper braking ramps, longer
braking processes (lifting equipment). Alternatively, it may also be possible to implement the required
braking power by the combination of standard brake resistors (please see chapter 2.6.5 "Combination
of brake resistors").
Pos: 50 /Anleitungen/ Elektronik/FU und St arter/2. Montage und Inst allation/Zubehör/ Bremswiderstand/SK 500EKombination von Br emswiderständen [ SK 5xxE] @ 6\mod_1421419498283_ 388.docx @ 199459 @ 3 @ 1
2.6.5 Combination of brake resistors
By the combination of 2 or more standard brake resistors it is possible to implement considerably
higher braking powers than are possible with the directly assigned standard brake resistor.
However, the following must be noted when doing this:
• Series connection
The powers and ohmic resistances are added. If the resulting ohmic resistance is too high, the
braking power (e.g. a brief higher braking pulse) may not be able to be dissipated. As a result, the
frequency inverter goes into an error state (Error E 5.0).
• Parallel connection
The powers and conduction values are added, the total resistance reduces. If the resulting ohmic
resistance is too low, the current to the brake chopper will be too high. As a result, the frequency
inverter goes into an error state (Error E 3.1). In addition, the inverter may also be damaged.
Pos: 51 /Anleitungen/ Elektronik/FU und St arter/2. Montage und Inst allation/Zubehör/ Bremswiderstand/SK 500EKombination von Br emswiderständen - Tabelle Kombinierte BW [SK 5xxE] @ 6\mod_142201669955 7_388.docx @ 200258 @ @ 1
With the brake resistor combinations from the standard range which are listed below, at least 80% of
the braking power in comparison with the rated power of the frequency inverter can be implemented.
Taking into account the efficiency of the drive unit as a whole, these combinations can be used for