Single Phase Input Power Considerations; Single Phase Control Derating; Size A, B And B2 Single Phase Power Installation - Baldor 23H Series Installation & Operating Manual

Single Phase Input Power Considerations

Single Phase Control Derating: Single phase power derating requires that the continuous and peak current ratings

Size A, B and B2 Single Phase Power Installation

Figure 3-5 Size A, B and B2 Single Phase 230/460VAC Power Connections
L1
Note 1
* Circuit
Breaker
Note 3
A1 B1
*Optional
Note 4
Line
Reactor
A2 B2
Note 3
L1
Control
MN723
Single phase AC input power can be used to power the control instead of three phase for
control sizes A, B, B2, C, C2, D, D2, E and F. The specifications and control sizes are
listed in Section 7 of this manual. If single phase power is to be used, the rated
Horsepower of the control may have to be reduced (derated). In addition, power wiring
and jumper changes are required.
Single phase rating wire size and protection devices are listed in Tables 3-4 and 3-5.
of the control be reduced by the following percentages:
1. 3–10A 230 and 2–5A 460 VAC controls:
No derating required.
2. 15–28A (Size B and B2) 230 and 5–15A 460 VAC controls:
Derate HP by 40% of the nameplate rating.
3. 42–55A (Size C) and Larger 230 and 460 VAC controls:
Derate HP by 50% of the nameplate rating.
Jumper Configuration
Size A, B and B2 controls, no jumper changes required.
L2
Earth
Note 2
* Optional components not provided with control.
Notes:
L2 L3
1.
2.
Baldor
3.
4.
Single phase operation of G and H size controls is not possible.
(See Figure 3-5.)
L1
* Fuse
Connection
A1 B1
See "Protective Devices" described previously in this section.
Use same gauge wire for Earth ground as is used for L1, L2 and L3.
Metal conduit should be used. Connect conduits so the use of a
Reactor or RC Device does not interrupt EMI/RFI shielding.
See Line/Load Reactors described previously in this section.
See Recommended Tightening Torques in Section 7.
L2
Note 1
Receiving & Installation 3-11