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Alternator Operation and Diagnosis
123
Rewiring Procedures for
Changing the Generator Set
Output Voltage
The alternator stator features a 12 lead design that
contains two separate windings for each of the
three output phases. The 12 leads are numbered
T1 through T12. All rewiring is performed inside
the control box.
All generator sets are factory wired for 460 Vac
power output. 460 Vac operation requires that the
two individual windings in each of the three
phases be connected in series: T4 tied to T7, T5
tied to T8, and T6 tied to T9. The three output
phases are:
230 Vac operation requires that one of the two
windings in each of the three phases be connected
in parallel: T4, T5, and T6 are tied together. The
three output phases are:
Figure 101: Changing Output Voltage
Rewiring Procedure for Changing
the Output Voltage from 460 Vac to
230 Vac
1. Refer to the unit wiring diagram for
illustrations of the proper wire connections.
2. Disconnect Wires:
a. Remove wire T7 from T4 connection, wire
T8 from T5 connection and wire T9 from
T6 connection on the main output terminal
block.
b. Remove jumper wires on the terminal
block from the T4 connection and T5
connection.
3. Reconnect Wires:
a. Install wire T7 lead on L1 (Black Wire)
terminal, wire T8 on L2 (White Wire)
terminal and wire T9 lead on L3 (Red
Wire) terminal.
b. Connect T4 jumper wire lead to J5 wire
terminal. Connect T5 jumper wire lead to
J6 wire terminal.
4. Change output receptacle to 230 Vac.
5. Change voltage decal and nameplate markings
from 460 Vac to 230 Vac.
6. Use the Configuration Menu to change the
Output Voltage setting from 460 to 230. See
“Configuration Menu” on page 69.
Phase
Wires
A (Black)
T1
B (White)
T2
C (Red)
T3
Phase
Wires
A (Black)
T1, T7 (tied together)
B (White)
T2, T8 (tied together)
C (Red)
T3, T9 (tied together)
WARNING: Disconnect the unit battery to
prevent the unit from accidentally starting
during rewiring.
Summary of Contents for SGCO 3000
Page 4: ......
Page 12: ...SGCO 3000 Genset Addendum 12...
Page 14: ...Genset Model Features 14...
Page 22: ...Service Guide 22...
Page 32: ...Unit Description Features Options 32...
Page 78: ...Operating Instructions 78...
Page 86: ...Electrical Maintenance 86...
Page 114: ...Engine Maintenance 114...
Page 124: ...Alternator Operation and Diagnosis 124...
Page 130: ...Structural Accessory Maintenance 130...
Page 138: ...Index 138...
Page 140: ...Electrical and SG Menu Flow Diagrams 140...
Page 141: ...141 SGCO 3000 Wiring Diagram Page 1 of 1...