UPS 120, UPS 150, UPS 250, UPS 300, UPS 301, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supplies Caterpillar

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When servicing or repairing electric power generation equipment: Make sure the unit is off-line (disconnected from utility and/or other generators power service), and either locked out or tagged DO NOT OPERATE. Remove all fuses.

Preheat Cycle for the Flywheel

The UPS uses the preheat cycle in order to warm the rotor. Verify if preheat is necessary with the start of the flywheel. There are some different factors that can go into determining if preheat is required or if preheat is not required. Refer to Systems Operation, Testing and Adjusting, RENR9988, "General Information" for an explanation of the process for preheat. Once the preheat cycle is complete, the system will automatically continue with start-up or RPS calibration.

Note: Call technical support for a password in order to bypass the preheat cycle.

Single Input without Switches

Illustration 1	g01259448
MMS I/O cabinet view (1) System output bus (2) System input bus

Illustration 2	g01259466
MMS system cabinet view (3) MMU 1 input isolation switch (4) MMU 1 output isolation switch (5) MMU 2 input isolation switch (6) MMU 2 output isolation switch (7) MMU 3 input isolation switch (8) MMU 3 output isolation switch (9) MMU 4 input isolation switch (10) MMU 4 output isolation switch (11) Motorized bypass breaker (K3)

Prestart Procedure

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Illustration 3	g01260699
User interface system cabinet (12) Key switch (19) Soft key (home) (20) LCD display

1. Turn the key switch (12) on the system cabinet to the BYPASS position. Refer to Illustration 3.
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   Illustration 4	g01259604
   User interface on MMU (13) Key switch

2. Turn the key switch (13) on each multiple module unit (MMU) to the BYPASS position. Refer to Illustration 4.

3. Open the output isolation switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

4. Open the input isolation switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

Start-up Procedure

1. Apply facility power to the system input bus (2). Refer to Illustration 1.

2. Close the input isolation switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

3. Close the output isolation switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

4. Connect the system output bus (1) to the facility load circuits.

5. Turn the key switch (12) on the system cabinet to the ONLINE position. Refer to Illustration 3.

6. Turn the key switch (13) on each MMU to the ONLINE position. Refer to Illustration 4.

   The system will enter the "Bypassed-Auto Start" state. The system will begin to charge the flywheel. When the flywheel reaches a rate of 4000 RPM, the system changes to the on-line mode. The system is then operational.

Single Input with 3 Switches

Illustration 5	g01260701
View of the MMS I/O cabinet single input with 3 switches (14) Maintenance bypass switch (15) Input isolation switch (16) Output isolation switch

Prestart Procedure

1. Turn the key switch (12) on the system cabinet to the BYPASS position. Refer to Illustration 3.

2. Turn the key switch (13) on each MMU to the BYPASS position. Refer to Illustration 4.

3. Open the output isolation switch (16) that is located in the input/output cabinet. Refer to Illustration 5.

4. Open the output isolation switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

5. Open the input isolation switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

6. Open the input isolation switch (15) that is located in the input/output cabinet. Refer to Illustration 5.

7. Open the maintenance bypass switch (14) that is located in the input/output cabinet. Refer to Illustration 5.

Start-up Procedure

1. Apply facility power to the system input bus (2). Refer to Illustration 5.

2. Close the input isolation switch (15) that is located in the Input/Output cabinet. Refer to Illustration 5.

3. Close the input isolation switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

4. Close the output isolation switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

5. Close the output isolation switch (16) that is located in the input/output cabinet. Refer to Illustration 5.

6. Turn the key switch (12) on the system cabinet to the ONLINE position. Refer to Illustration 3.

7. Turn the key switch (13) on each MMU to the ONLINE position. Refer to Illustration 4.

   The system will enter the "Bypassed-Auto Start" state. The system will begin to charge the flywheel. When the flywheel reaches a rate of 4000 RPM, the system changes to the on-line mode. The system is then operational.

8. Verify that the UPS is in the on-line mode by pressing the"Home" soft key (19) that is located on the user interface panel. Observe the status line on the LCD (20).

Dual Input without Switches

Illustration 6	g01260705
View of the MMS I/O cabinet dual input without switches (17) MMU input bus (18) Bypass input bus

Pre-start Procedure

1. Turn the key switch (13) on each MMU to the BYPASS position. Refer to Illustration 4.

2. Open the Output Isolation Switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

3. Open the Input Isolation Switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

Start-up Procedure

1. Apply facility power to the Bypass Input Bus (18). Refer to Illustration 6.

2. Apply facility power to the MMU Input Bus (17). Refer to Illustration 6.

3. Close the Input Isolation Switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

4. Close the Output Isolation Switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

5. Connect the system output bus (1) to the facility load circuits. Refer to Illustration 6.

6. Turn the key switch (12) on the system cabinet to the ONLINE position. Refer to Illustration 3.

7. Turn the key switch (13) on each MMU to the ONLINE position. Refer to Illustration 4.

   The system will enter the "Bypassed-Auto Start" state. The system will begin to charge the flywheel. When the flywheel reaches a rate of 4000 RPM, the system changes to the on-line mode. The system is then operational.

Dual Input with 2 Switches

Illustration 7	g01260700
View of the MMS I/O cabinet dual Input with 2 Switches

Prestart Procedure

1. Turn the key switch (12) on the system cabinet to the BYPASS position. Refer to Illustration 3.

2. Turn the key switch (13) on each MMU to the BYPASS position. Refer to Illustration 4.

3. Open the output isolation switch (16) that is located in the input/output cabinet. Refer to Illustration 5.

4. Open the output isolation switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

5. Open the input isolation switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

6. Open the maintenance bypass switch (14) that is located in the input/output cabinet.

Start-up Procedure

1. Apply facility power to the bypass input bus (18). Refer to Illustration 6.

2. Apply facility power to the system input bus (2). Refer to Illustration 5.

3. Close the input isolation switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

4. Close the output isolation switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

5. Close the output isolation switch (16) that is located in the input/output cabinet. Refer to Illustration 5.

6. Turn the key switch (12) on the system cabinet to the ONLINE position. Refer to Illustration 3.

7. Turn the key switch (13) on each MMU to the ONLINE position. Refer to Illustration 4.

   The system will enter the "Bypassed-Auto Start" state. The system will begin to charge the flywheel. When the flywheel reaches a rate of 4000 RPM, the system changes to the on-line mode. The system is then operational.

Dual Input with 3 Switches

Illustration 8	g01260973
View of the MMS I/O cabinet dual input with 3 switches (21) Bypass input switch

Prestart Procedure

1. Turn the key switch (12) on the system cabinet to the BYPASS position. Refer to Illustration 3.

2. Turn the key switch (13) on each MMU to the BYPASS position. Refer to Illustration 4.

3. Open the output isolation switch (16) that is located in the input/output cabinet. Refer to Illustration 5.

4. Open the output isolation switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

5. Open the input isolation switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

6. Open the bypass input switch (21) that is located in the Input/Output cabinet. Refer to Illustration 8.

7. Open the maintenance bypass switch (14) that is located in the input/output cabinet.

Start-up Procedure

1. Apply facility power to the bypass input bus (18). Refer to Illustration 6.

2. Apply facility power to the system input bus (2). Refer to Illustration 5.

3. Close the bypass input switch (21) that is located in the Input/output cabinet. Refer to Illustration 8.

4. Close the input isolation switches (3) ( 5) ( 7) ( 9) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

5. Close the output isolation switches (4) ( 6) ( 8) ( 10) that are located in the system cabinet for the appropriate MMU. Refer to Illustration 2.

6. Close the output isolation switch (16) that is located in the Input/Output cabinet. Refer to Illustration 5.

7. Turn the key switch (12) on the system cabinet to the ONLINE position. Refer to Illustration 3.

8. Turn the key switch (13) on each MMU to the ONLINE position. Refer to Illustration 4.

   The system will enter the "Bypassed-Auto Start" state. The system will begin to charge the flywheel. When the flywheel reaches a rate of 4000 RPM, the system changes to the on-line mode. The system is then operational.