General Information

ALTERNATOR AC LEAD

CONNECTIONS

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. The voltage and phase are described on the generator data label. The number of lead wires can be identified using the Specifications section and the power output rating on the generator data label. For example, if the generator produces 130kW, 277/480 Volt, 3-phase power, the generator has 12 alternator output leads. Figure 7.3 describes the stator power winding connection for the generator.

FOUR-LEAD, SINGLE-PHASE STATOR

Four-lead alternators (see Figure 7.1) are designed to supply elec- trical loads with voltage code “A” (240V, 1-phase, 60 Hz). Electrical power is produced in the stator power windings. These windings were connected at the factory to the main circuit breaker as shown in Figure 7.1.

The rated voltage between each circuit breaker terminal 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

7-1

ALTERNATOR POWER WINDING CONNECTIONS

3-PHASE ALTERNATORS ("Y" CONFIGURATION)

The Stationary Emergency Generator is designed to supply 3-phase electrical 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 through 7.6.

The rated voltage between circuit breaker terminals E1-E2, E1-E3 and E2-E3 is 480V, 208V or 600V depending on the model.

The rated voltage between each circuit breaker terminal and the neutral point 00 is 277V, 120V, or 346V depending on the model.

Figure 7.2 — Stator Power Winding

Connections - 3-phase, 277/480V (6 Lead)

E1

S1

INTERNAL

CONNECTIONS

L - L

 

S6

S4

 

 

00 (NEUTRAL)

 

 

 

 

 

 

S5

 

S3

 

 

S2

 

 

 

E3

 

L - N

E2

 

 

 

Figure 7.3 — Stator Power Winding

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

 

E1

 

 

S1

 

 

 

S4

 

 

 

S7

 

 

 

 

 

L - L

S12

S10

 

 

S9

S11

S8

 

S6

 

S5

 

S3

 

 

S2

 

 

 

E3

 

L - N

E2

 

 

 

 

 

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Generac QT06024AVAX Alternator AC Lead Connections, Alternator Power Winding Connections, FOUR-LEAD, SINGLE-PHASE Stator

QT06024ANAX, QT06024AVSX, QT06024ANSX, QT06024AVAX specifications

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