Hardware Changes For Reduced Voltage Input - Baldor 22H series Installation & Operating Manual

Section 1
General Information

Hardware Changes for Reduced Voltage Input

Control Sizes
C+, D, D+
Logic Control
Board
Control
Transformer
Control Size
G+
Fuse xfmr xfmr
Block
Swing out panel
MN722
Size C+, D+,D, E, F and G+ controls all require modification for operation at a reduced
line voltage (less than rated nominal). Table 3-8 defines the modifications for each
enclosure size. Figure 3-1 shows the locations of the transformer locations for each
enclosure size.
Table 3-8 Hardware changes for 380-400VAC operation
Enclosure
Size Transformer
Tap Change
C+
D+
D
E
F
G+
Figure 3-1 Control and Contactor Transformer Locations
Control Size
E
Input Contactor
Contactor Transformer
Fan
Transformers
Contactor Input
Transformer Contactor
Control Contactor
Transformer
Tap Change
Yes No
Yes No
Yes No
Yes Yes
Yes Yes
No Yes
Control
Transformer
Fuse Block
Connection
Change
Yes
Control Size
F
Contactor
Input
Transformer
Contactor
Control
Transformer
Not drawn to scale or proportion
Receiving & Installation 3-13