Siemens 30 kW User Manual
GENERATOR AC LEAD CONNECTIONS
See “Voltage Codes”. This generator may be rated at
any one of five voltages, either single-phase or three-
phase. The electrical wires in the unit’s AC connec-
tion (lower) panel should be installed according to
the number of leads and the voltage/phase required
for the application. If there are any questions regard-
ing lead connection, refer to the wiring diagrams at
the back of this manual.
any one of five voltages, either single-phase or three-
phase. The electrical wires in the unit’s AC connec-
tion (lower) panel should be installed according to
the number of leads and the voltage/phase required
for the application. If there are any questions regard-
ing lead connection, refer to the wiring diagrams at
the back of this manual.
Voltage codes apply to the type of stator assembly
installed on a particular generator.
installed on a particular generator.
ALTERNATOR POWER WINDING
CONNECTIONS
CONNECTIONS
FOUR-LEAD, SINGLE-PHASE STATOR
Four-lead generators are built to supply electrical
loads with voltage code "A" (240V, 1-phase, 60Hz).
Electrical power is produced in the stator power
windings. These windings were connected at the fac-
tory to the main circuit breaker as shown in Figure
7.1.
loads with voltage code "A" (240V, 1-phase, 60Hz).
Electrical power is produced in the stator power
windings. These windings were connected at the fac-
tory to the main circuit breaker as shown in Figure
7.1.
The rated voltage between each circuit breaker ter-
minal is 240V. The rated voltage between each circuit
breaker terminal and the neutral point 00 is 120V.
minal is 240V. The rated voltage between each circuit
breaker terminal and the neutral point 00 is 120V.
Figure 7.1 — Four-lead, Single-phase Stator
3-PHASE ALTERNATORS ("Y" CONFIGURATION)
The generator is designed to supply 3-phase electri-
cal loads. Electric power is produced in the alterna-
tor power windings. These windings were connected
at the factory to the main circuit breaker with a “Y”
configuration as shown in Figures 7.2, 7.3, and 7.4.
cal loads. Electric power is produced in the alterna-
tor power windings. These windings were connected
at the factory to the main circuit breaker with a “Y”
configuration as shown in Figures 7.2, 7.3, and 7.4.
The rated voltage between circuit breaker terminals
E1-E2, E1-E3 and E2-E3 is either 480V or 208V
depending on the model.
E1-E2, E1-E3 and E2-E3 is either 480V or 208V
depending on the model.
The rated voltage between each circuit breaker termi-
nal and the neutral point 00 is either 277V or 120V
depending on the model.
nal and the neutral point 00 is either 277V or 120V
depending on the model.
Figure 7.2 — Stator Power Winding
Connections - 3-phase, 120/208V (12 Lead)
E1
S10
S12
S4
S5
S2
S8
S11
S6
S3
S9
S7
S1
E2
E3
L - N
L - L
Figure 7.3 — Stator Power Winding
Connections - 3-phase, 277/480V (12 Lead)
E1
S1
S4
S7
S12
S11
S10
S8
S5
S2
E2
S9
S6
S3
E3
L - N
L - L
7-1
Standby Generator Sets
General Information
ACConn005 Re
v. 0 04/06