Danfoss VLT HVAC Drive FC 102 Design Manual page 137

How to Install
A
* F10/F11/F12/F13 Only
R1
S1
T1
R2
S2
T2
B
* F10/F11/F12/F13 Only
R1
S1
T1
R2
S2
T2
C
A 1), 2), 3)
6-Pulse Connection
B
Modified 6-Pulse Connection
C
12-Pulse Connection 3), 5)
Illustration 5.82 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.
MG16C202
Design Guide
91-1
Recti er 1
92-1
93-1
91-2
Recti er 2
92-2
93-2
95
91-1
Recti er 1
92-1
93-1
91-2
Recti er 2
92-2
93-2
95
91-1
Recti er 1
92-1
93-1
91-2
Recti er 2
92-2
93-2
95
2), 3), 4)
Danfoss A/S © Rev. 05/2014 All rights reserved.
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