Section 3– Page 5
Table 3-A – Power Wiring and Fusing
Model MINIMUM WIRE SIZE AWG
1
FUSE RATING AMPS
LX-400 20 5
LX-700 18 8
LX-1100 16 12
1
Recommended fuse type is a LOW PEAK delayed action type fuse such as Bus brand
type LPN fuse. A standard rated delayed action or dual element fuse such as Bus
brand FRN may be used in lieu of the Low peak type fuse when availability dictates but
the level of drive protection afforded by the LPN fuse is better. In the case of a short
circuit in the drive, there will be fewer failed drive components if a low peak fuse is used
because it will blow before the currents reach a high level.
3.4.2 Transformer Power Supply
One 3Ø transformer may be used to supply more than one drive. The secondary
winding should be set up to supply the sum of the nominal current of the motors
connected. The transformer secondary must be a delta configuration or a WYE
configuration with a full current grounded neutral connection due to the harmonics
induced when supplying power to a rectified power supply. The type of primary winding
is immaterial.
Figure 3.6 Power supply example
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