Three Phase Input Power - Baldor 23H Series Installation & Operating Manual

Three Phase Input Power

L1
Note 1 * Circuit
Breaker
Note 3
A1 B1
*Optional
Note 4
Line
Reactor
A2 B2
Note 3
L1
Series 23H
Control
MN723
Tap Change Procedure (size G controls). See Figure 3-3.
1. Be sure drive operation is terminated and control is disabled.
2. Remove all power sources from the control. If power has been applied, wait at
least 5 minutes for bus capacitors to discharge.
3. Remove or open the front cover and locate the control transformer (Figure 3-3).
4. Remove the wires from the two right side terminals.
5. Place the wires on the center terminals as shown.
6. Install or close the front cover.
Figure 3-3 Size G - Control Transformer Terminal Block
460VAC
Three phase AC power connections are shown in Figure 3-4. The 23H control has an
electronic I 2 t motor overload protection. If motor overloads are desired, they should be
sized according to the manufacturers specifications and installed between the motor and
the T1, T2 and T3 terminals of the control.
Note: Use same gauge wire for earth ground as is used for L1, L2 and L3
connections. Refer to the wire size and protection devices tables shown
previously in this section.
Figure 3-4 Three Phase AC Power Connections
L2 L3
Earth
Note 2
C1
*
Notes:
C2
1.
L2 L3
2.
3.
Baldor
4.
L1
Alternate *
Fuse
Connection
A1 B1
Optional components not provided with control.
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.
380-400VAC
L2 L3
Note 1
C1
Receiving & Installation 3-9