Danfoss VLT AQUA Drive FC 202 Design Manual page 130

How to Install
A
5 5
B
C
A
6-Pulse Connection
B
Modified 6-Pulse Connection
C
12-Pulse Connection
Illustration 5.90 Mains Connection Options for 12-Pulse Frequency Converters
Notes:
1) Parallel connection shown. A single 3-phase cable may be used with sufficient carrying capability. Install shorting bus
bars.
2) 6-pulse connection eliminates the harmonics reduction benefits of the 12-pulse rectifier.
3) Suitable for IT and TN mains connection.
4) If one of the 6-pulse modular rectifiers becomes inoperable, it is possible to operate the frequency converter at reduced
load with a single 6-pulse rectifier. Contact Danfoss for reconnection details.
5) No paralleling of mains cabling is shown here. A 12-pulse frequency converter used as a 6-pulse should have mains
cables of equal numbers and lengths.
128
Design Guide
91-1
92-1
93-1
91-2
92-2
93-2
95
* F10/F11/F12/F13 Only
R1
91-1
S1 92-1
T1
93-1
R2 91-2
92-2
S2
T2 93-2
95
* F10/F11/F12/F13 Only
R1
91-1
S1 92-1
T1
93-1
R2
91-2
92-2
S2
T2 93-2
95
1), 2), 3)
2), 3), 4)
3), 5)
Danfoss A/S © Rev. 06/2014 All rights reserved.
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MG20Z202