5/10kw tqg dc circuits preheat circuit crank circuit fuel circuit field flash circuit battery...

5/10KW TQG DC CIRCUITS

• Preheat Circuit• Crank Circuit• Fuel Circuit• Field Flash Circuit• Battery Charging

Circuit

PREHEAT CIRCUIT

In a cold weather environment with S1 in position #1, the intake

manifold/ head fails to warm up

CIRCUIT COMPONENTS

• K18: Preheat relay

• HTR1, and HTR2: heaters

add HTR3 & 4 for 10KW units

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CB1-Pushed inS17 Pulled outS10 @ Normal

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L4 1

L4 +

B1 +

THIS IS THE BEGINNING OF THE RETURN PATH

Once current LEAVES the S1 it will take the same path back to the power source.

Don’t go thru the K2 because it is not energized.

K18 IS’NT ENERGIZED YETCONTACTS STILL OPEN

Now the K18 is energized.

L4 1

Contacts close

CRANK CIRCUITS-1 is in position 5, generator fails to crank.

CIRCUIT COMPONENTS

• K16: Crank disconnect relay

• K2: Cranking relay.

• L4: Starter solenoid.

• B1: Cranking motor(starter).

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Energize K16Start Here

TB

5 12

TB6

Don’t go thru the K2 because it is not energized.

Now K16 is energized.

Energize K2

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Once the current reaches the S1 it takes the same path back to the power source.

S1

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L4 is energized and the starter motor engages.

FUEL CIRCUITWith the S-1 in position 5, the generator cranks and fails to start/ runs & when the S-1 is released TO position 4, the generator shuts OFF.

CIRCUIT COMPONENTS

• L5: Fuel shut off solenoid.

• E2: Fuel pump.

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S14 WILL OPEN @ 900RPM

Energize E2

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Once current reaches the S1 it will take the same path back to the power source.

Don’t go thru the K2 even though its energized.

You cant go thru the K18 since its not energized.

Now E2 is energized.

Once current reaches K2 A1It follows current back to the

power source.

Once current reachesTB4-12, it flows back to power source.

INITIALFIELD FLASH CIRCUIT

While holding S1 is in position 5, generator cranks and runs. You

observe no hertz and no volts on the meters M1 & M2

CIRCUIT COMPONENTS

• K15: Field flash relay.

• G1: Main AC generator

F1 F2

G1

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S14 Senses the Engine Speed Via MPU@ 900RPM S14 OPENS & K16 de-energizes

Energize K15

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Once current reaches the S1 it will take the same path back to the power source.

Now K15 is energized.

Flash G1

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Once current reachesTB5-14, it flows back to power source.

BATTERY CHARGING CIRCUIT

With S1 in position 4, and the generator running. The battery

charging ammeter (M4) shows a discharge reading.

CIRCUIT COMPONENTS

• G2: Battery charging alternator.

• FU1: Fuse

Start Here

Start Here

Once current reaches the S1 it will take the same path back to the power source.

Start Here