Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 31

Electrical Installation
NOTICE
If an unscreened/unarmoured cable is used, some EMC requirements are not complied with. Use a screened/armoured
motor cable to comply with EMC emission specifications. For more information, see EMC Specifications in the product
relevant design guide.
See chapter 7.1 General Specifications for the correct dimensioning of the motor cable cross-section and length.
R1
S1
T1
R2
S2
T2
A
R1
S1
T1
R2
S2
T2
B
Illustration 4.2 A) Modified 6-Pulse Connection
2), 4)
B) 12-Pulse Connection
Notes
1) 6-pulse connection eliminates the harmonics reduction benefits of the 12-pulse rectifier.
2) Suitable for IT and TN mains connection.
3) In the unlikely event that 1 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.
4) No paralleling of mains cabling is shown here.
MG16B202
Operating Instructions
91-1
Rectifier 1
92-1
93-1
91-2
92-2 Rectifier 2
93-2
95
91-1
Rectifier 1
92-1
93-1
91-2
92-2 Rectifier 2
93-2
95
1), 2), 3)
Danfoss A/S © Rev. 06/2014 All rights reserved.
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