Generac Power Systems 65 Brush Holder, Battery Charge Components, Excitation Circuit Components

Section 2

MAJOR GENERATOR COMPONENTS

3.Two excitation winding output leads (No. 2 and 6). These leads deliver unregulated excitation current to the voltage regulator.

4.Three (3) battery charge output leads (No. 55, 66 and 77).

via the rectifier, a 7.5 amp fuse and Wire No. 13. A 1 ohm, 25 watt resistor is connected in series with the grounded side of the circuit.

Figure 2-4. – Battery Charge Circuit

Figure 2-2. – Stator Output Leads

BRUSH HOLDER

The brush holder is retained in the rear bearing carri- er by two M5 screws. It retains two brushes, which contact the Rotor slip rings and allow current flow from stationary parts to the revolving Rotor. The posi- tive (+) brush is located nearest the Rotor bearing.

Figure 2-3. – Brush Holder

BATTERY CHARGE COMPONENTS

The Stator incorporates dual battery charge windings. A battery charge rectifier (BCR) changes the AC out- put of these windings to direct current (DC). Battery charge winding output is delivered to the unit battery

EXCITATION CIRCUIT COMPONENTS

GENERAL:

During operation, the Rotor's magnetic field induces a voltage and current flow into the Stator excitation winding. The resultant AC output is delivered to a voltage regulator via an excitation circuit breaker (CB3).

Figure 2-5. – Schematic: Excitation Circuit

EXCITATION CIRCUIT BREAKER:

The excitation circuit breaker (CB3) is self-resetting and cannot be reset manually. Should the breaker open for any reason, excitation current flow to the

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