4-8 Receiving & Installation MN792

Electrical Installation Continued
Power Connections Single phase operation of this control is not possible.
Power connections are shown in Figure 4-8. (The location of these terminals is shown in Figure 4-9).
Figure 4-8 3 Phase Power Connections
L1 L2 L3
L1 L2 L3

Earth

Note 2
Baldor Control
Note 1
Notes:
1. See Protection Device description in this section.
2. Metal conduit or shielded cable should be used. Connect conduits so
the use of a Reactor or RC Device does not interrupt EMI/RFI shielding.
3. Use the same gauge wire for Earth as used for L1, L2, L3 connections.
4. Use same gauge wire for Earth ground as is used for L and N,
or L1, L2 L3. (VDE (Germany) requires 10mm2 minimum,
6AWG).
5. Reference EMC wiring in Appendix A for CE compliance.
6. AC Contactor is internal for size 1 and 2 controls. Size 3–5, the
contactor can be connected between TB3–3 (line) and TB3–4
(neutral) and its purpose is to provide AC power disconnection.
Maximum inrush current must not exceed 3A.
Note 3 & 4
Fuse
Connection
Start
Contactor
TB1
3
RE
4
TB3 This figure shows optional components not furnished with control.
Note 6
See Recommended Tightening Torques in Section 9.
Figure 4-9 Size 1 & 2 Internal Logic Transformer Jumper Locations
Power
Connections Motor GroundEarth from
AC Main Supply
Logic
Transformer
208
Conn5
230
Conn4
400
Conn3
480
Conn2
Conn1
Note: When the internal logic
transformer is installed, FS7
on the main board is
removed. FS1 on the logic
supply board is used.
Move the jumper to the
correct voltage of the
L1,L2,L3 supply input.
Size 1 control
See Recommended Tightening Torques in Section 9.
Voltage Range
460–500
380–415
220–240
208
Setting
480
400
230
208
FS1
FS7
Logic Trans.
Location
Size 2
Logic Trans.
Location
Size 1
Size 2 control
Logic
Transformer
208
230
400
480
Move the jumper to the
correct voltage of the
L1,L2,L3 supply input.
(480V position shown.)
Logic Power For size 1 and 2 controls, the logic transformer is internal. The location is shown in Figure 4-9. Because the
logic transformer is powered from the L1,L2,L3 input AC power, the jumper must be placed in the location that
corresponds to the AC line voltage.
For size 3, 4 and 5 controls the single phase logic power must be supplied by an external source. Normally
115VAC is applied at TB3 terminals L and N, see Figure 4-7 for the location. (Your control may have been
ordered with 230VAC logic power. In that case, 230VAC is applied at TB3 terminals L and N.)