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Manual Generac QT08054KNANA Generator

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Manual

GENERATOR AC LEAD CONNECTIONS

See “Voltage Codes”. This Stationary Emergency

Generator may be rated at any one of five voltages,

either single-phase or three-phase. The electrical

wires in the unit’s AC connection (lower) panel should

be installed according to the number of leads and the

voltage/phase required for the application. If there

are any questions regarding 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.

ALTERNATOR POWER WINDING

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.

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.

Figure 7.1 — Four-lead, Single-phase Stator

3-PHASE ALTERNATORS ("Y" CONFIGURATION) 

The Stationary Emergency Generator is designed

to supply 3-phase electrical loads. Electric power is

produced in the alternator 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.

The rated voltage between each circuit breaker termi-

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)

S10

S12

S11

S7 S1

L - N

L - L

Figure 7.3 — Stator Power Winding

Connections - 3-phase, 277/480V (12 Lead)

S12

S11

S10

L - N

L - L

7-1

Stationary Emergency Generator

General Information

ACConn005 Rev. A 09/08

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