Specifications

* F10/F11/F12/F13 Only
* F10/F11/F12/F13 Only
91-1
92-1
93-1
91-2
92-2
93-2
S1
T1
R1
S2
T2
R2
95
Rectier 1
Rectier 2
Inverter1 F8/F9
Inverter2 F10/F11
Inverter3 F12/F13
130BB758.11
91-1
92-1
93-1
91-2
92-2
93-2
S1
T1
R1
S2
T2
R2
95
Rectier 1
Rectier 2
Inverter1 F8/F9
Inverter2 F10/F11
Inverter3 F12/F13
91-1
92-1
93-1
91-2
92-2
93-2
95
Rectier 1
Rectier 2
Inverter1
Inverter2 F10/F11
Inverter3 F12/F13
A
B
C
Illustration 5.82 Mains Connection Options for 12-Pulse Frequency Converters
A
6-Pulse Connection
1), 2), 3)
B
Modified 6-Pulse Connection
2), 3), 4)
C
12-Pulse Connection
3), 5)
Table 5.63 Legend to Illustration 5.82
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.
How to Install VLT® HVAC Drive FC 102 Design Guide
MG16C102 - Rev. 2013-08-20 133
5
5