3145, 3150 & 3160 ELECTRIC SET ENGINES Caterpillar


Power Output Options

Usage:

Any of the 3100 Series Generators can be operated at any of a wide range of voltages for both single and three phase; 50 or 60 hertz. Generator rating can be found on the nameplate.


NOTICE

Exercise care when operating generator at frequencies and voltages other than ratings stamped on nameplate.


The generators may be operated at 50 hertz by decreasing the load and voltage 5/6 of the 60 hertz rating. Three phase generators may be operated single phase by reconnecting and operating at 2/3of the three phase rating.

To run the generator at 50 hertz, decrease engine speed to 1500 RPM and decrease the voltage, using the voltage adjust rheostat to rated 50 hertz voltages.

When connecting for different voltages, the following connections may be left connected:

1. Leave exciter field leads (F1) and (F2) connected to terminals (F-) and (F+) respectively.

2. Leave voltage adjust rheostat leads connected to terminals (7) and (8) on the voltage regulator.

3. Leave generator lead (9) connected to lead (C) from the voltage regulator boost transformer.

4. Leave generator lead (7) connected to lead (A) from the voltage regulator boost transformer.

------ WARNING! ------

Loose connections in the terminal box can result in serious damage to the generator and external load and injury to personnel. After the generator is reconnected and the connections are double checked, retape all connections with a high grade electrical insulating tape. Always use new tape. Do not reuse tape removed from old connections.

--------WARNING!------

Three Phase-Three Wire (Low Voltage)

Connect generator lead as follows:

1. Refer to WIRING DIAGRAM - FIGURE 2 - 3 PHASE PARALLEL DELTA.

2. Connect stator leads (1), (6), (12), regulator lead (L), boost transformer lead (B), terminal strip lead (B) and Load Line (L1) together.

3. Connect a jumper wire between regulator terminals (L), (T1) and (T3).

4. Connect stator leads (2), (4), (8), (10) and Load Line (L2) together.

5. Connect a jumper wire between regulator terminals (N), (T2) and (T4).

6. Connect stator leads (3), (5), (11), regulator lead (N), boost transformer lead (D), terminal strips lead (N) and Load Line (L3) together and to grounding stud.

7. Wrap all connection points with electrical tape of other electrical insulating material.

Three Phase-Three Wire (High Voltage)

Connect generator leads as follows:

1. Refer to WIRING DIAGRAM - FIGURE 4 - 3 PHASE SERIES DELTA.

2. Connect stator leads (1), (12), regulator lead (L) terminal strip lead (B) and Load Line (L1) together.

3. Connect a jumper between regulator terminals (L) and (T1).

4. Connect a jumper between regulator terminals (T2) and (T3).

5. Connect stator leads (2), (10) and Load Line (L2) together.

6. Connect stator leads (3), (11), regulator lead (T4) and Load Line (L3) together.

7. Connect stator leads (8) and (5) together.

8. Connect stator lead (6) to boost transformer lead (D).

9. Connect stator lead (4), regulator lead (N), boost transformer lead (B), terminal strip lead (N) and Load Line (LN) together and to grounding stud.

10. Wrap all connection points with electrical tape or other electrical insulating material.

Three Phase-Four Wire (Low Voltage)

Connect generator leads as follows:

1. Refer to WIRING DIAGRAM - FIGURE 1 - 3 PHASE PARALLEL WYE.

2. Connect stator lead (1), boost transformer lead (B), terminal strip lead (B) and Load Line (L1) together.

3. Connect a jumper between regulator leads (L) and (T1).

4. Connect a jumper between regulator leads (T2) and (T3).

5. Connect stator leads (4), (5), (6), (10), (11), (12), regulator lead (N), terminal strip lead (N) and Load Line (LN) together and to grounding stud.

6. Connect stator lead (3), boost transformer lead (D) and Load Line (L3) together.

7. Connect stator leads (2), (8) and Load Line (L2) together.

8. Connect regulator lead (L) to boost transformer lead (A) and stator lead (7).

9. Connect regulator lead (14) to boost transformer lead (C) and stator lead (9).

10. Wrap all connection points with electrical tape or other electrical insulating material.

Three Phase-Four Wire (High Voltage)

Connect generator leads as follows:

1. Refer to WIRING DIAGRAM - FIGURE 3 - 3 PHASE SERIES WYE.

2. Connect stator lead (4), boost transformer lead (B) and terminal strip lead (B) together.

3. Connect stator lead (6) and boost transformer lead (D) together.

4. Connect stator leads (5) and (8) together.

5. Connect stator lead (1) and Load Line (L1) together.

6. Connect stator lead (2) and Load Line (L2) together.

7. Connect stator lead (2) and Load Line (L3) together.

8. Connect stator leads (10), (11), (12), regulator lead (N) terminal strip lead (N) and Load Line (LN) together and to grounding studs.

9. Connect a jumper between regulator terminals (L) and (T1).

10. Connect a jumper between regulator terminals (T2) and (T3).

11. Connect regulator lead (L) to stator lead (7) and boost transformer lead (A).

12. Connect regulator lead (T4) to stator lead (9) and boost transformer lead (C).

13. Wrap all connection points with electrical tape or other electrical insulating material.

Single Phase-Three Wire

Connect generator leads as follows:

1. Refer to WIRING DIAGRAM - FIGURE 5 - 1 PHASE THREE WIRE.

2. Connect a jumper between regulator terminals (N), (T1) and (T3).

3. Connect a jumper between regulator terminals (N), (T2) and (T4).

4. Connect stator lead (4), regulator lead (N), boost transformer lead (B), terminal strip lead (N) and Load Line (LN) together and to grounding stud.

5. Connect stator leads (1), (12), regulator lead (L), terminal strip lead (B) and Load Line (L1) together.

6. Connect stator leads (2), (10), and Load Line (L2) together.

7. Connect stator lead (6) to boost transformer lead (D).

8. Connect stator leads (3) and (11) together.

9. Connect stator leads (5) and (8) together.

10. Wrap all connection points with electrical tape or other electrical insulating material.

AMPERE CHART - 60 HERTZ GENERATOR

AMPERE CHART - 50 HERTZ GENERATOR

Caterpillar Information System:

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