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

System Pre-Shutdown

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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.

Illustration 1	g00863047
SIO PWA Serial Connection

Illustration 2	g00697157
The "Enter User Name" / "Password" Dialog Box

1. Connect a PC to the Parallel Cabinet Interface Board that is located in the System Cabinet.

2. Rotate the switch on the Parallel Interface Cabinet to the corresponding MMU.

3. Run the UPSView software by double clicking the UPSView icon on your PC desktop.

4. Select the "Enter Password" menu option in order to view the "Enter User Name" and the "Password" dialog box.

5. Enter a valid "User Name". Enter a valid "Password". Refer to Illustration 2.

6. Depress the "<Ctrl><X>" keys in order to bring the system to zero RPM.

7. The system will prompt you to confirm the option. Depress "<Y>" key.

   Note: Repeat this procedure for each flywheel.

   Note: This procedure is only available once during a 24 hour period.

   Note: A minimum of 15 minutes is required to lower the speed of the flywheel to 0 RPM.

Single Input without Switches

Illustration 3	g01259448
MMS I/O Cabinet View (1) System Output Bus (2) System Input Bus

Illustration 4	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)

Shutdown Procedure

1. Perform "System Pre-Shutdown".
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   Illustration 5	g01260699
   User Interface System Cabinet (12) key switch (19) Soft Key (Home) (20) LCD Display

2. Turn the key switch (12) on the System cabinet to the BYPASS position. Refer to Illustration 5.
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   Illustration 6	g01259604
   User Interface on MMU (13) key switch

3. Turn the key switch (13) on each Multiple Module Unit (MMU) to the BYPASS position. Refer to Illustration 6.

4. Verify that the system is in Bypass mode. Press the "Home" soft key (19) that is located on the User Interface Panel. Observe the status line on the LCD (20). Refer to Illustration 5.
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   NOTICE
   If the system does not enter the Bypass mode, Do Not Proceed with this procedure. Equipment damage or load interruption may occur. Contact technical support.

   Note: The output of the UPS will be disconnected and/or de-energized by continuing with this procedure.

5. Disconnect the facility load circuits from the System Output Bus (1). Refer to Illustration 3.

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

7. Open the Input Isolation Switches (3) ( 5) ( 7) ( 9) that are located in the System cabinet for the appropriate MMU. Refer to Illustration 4.

8. Remove facility power from the System Input Bus (2). Refer to Illustration 3.

9. Allow the capacitor banks to discharge for approximately 5 minutes.

   Note: When the flywheel is spinning, the following components are energized: the DC bus and the armature leads. Accomplish the procedure as quickly as possible. During the procedure, the rotor is spinning on the bottom bearing.

Single Input with Three Switches

Illustration 7	g01260701
View of the MMS I/O Cabinet Single Input with three Switches (14) Maintenance Bypass Switch (15) Input Isolation Switch (16) Output Isolation Switch

Shutdown Procedure

1. Perform "System Pre-Shutdown".

2. Turn the key switch (12) on the System cabinet to the BYPASS position. Refer to Illustration 5.

3. Turn the key switch (13) on each Multiple Module Unit (MMU) to the BYPASS position. Refer to Illustration 6.

4. Verify that the system is in Bypass mode. Press the "Home" soft key (19) that is located on the User Interface Panel. Observe the status line on the LCD (20). Refer to Illustration 5.
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   NOTICE
   If the system does not enter the Bypass mode, Do Not Proceed with this procedure. Equipment damage or load interruption may occur. Contact technical support.

   Note: The output of the UPS will be disconnected and/or de-energized by continuing with this procedure.

5. Open the Output Isolation Switch (16) that is located on the Input/Output cabinet. Refer to Illustration 7.

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

7. Open the Input Isolation Switches (3) ( 5) ( 7) ( 9) that are located in the System cabinet for the appropriate MMU. Refer to Illustration 4.

8. Open the Input Isolation Switch (15) that is located in the Input/Output Cabinet.

9. Remove facility power from the System Input Bus (2). Refer to Illustration 3.

10. Allow the capacitor to discharge for approximately 5 minutes.

    Note: When the flywheel is spinning, the following components are energized: the DC bus and the armature leads. Accomplish the procedure as quickly as possible. During the procedure, the rotor is spinning on the bottom bearing.

Dual Input without Switches

Illustration 8	g01260705
View of the MMS I/O Cabinet Dual Input without Switches (17) MMU Input Bus (18) Bypass Input Bus

Shutdown Procedure

1. Perform "System Pre-Shutdown".

2. Turn the key switch (13) on each Multiple Module Unit (MMU) to the BYPASS position. Refer to Illustration 6.

3. Verify that the system is in Bypass mode. Press the "Home" soft key (19) that is located on the User Interface Panel. Observe the status line on the LCD (20). Refer to Illustration 5.
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   NOTICE
   If the system does not enter the Bypass mode, Do Not Proceed with this procedure. Equipment damage or load interruption may occur. Contact technical support.

   Note: The output of the UPS will be disconnected and/or de-energized by continuing with this procedure.

4. Disconnect the facility load circuits from the System Output Bus (1). Refer to Illustration 3.

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

6. Open the Input Isolation Switches (3) ( 5) ( 7) ( 9) that are located in the System cabinet for the appropriate MMU. Refer to Illustration 4.

7. Remove facility power from the System Input Bus (2). Refer to Illustration 3.

8. Remove facility power from the Bypass Input Bus (18). Refer to Illustration 8.

9. Allow the capacitor to discharge for approximately 5 minutes.

   Note: When the flywheel is spinning, the following components are energized: the DC bus and the armature leads. Accomplish the procedure as quickly as possible. During the procedure, the rotor is spinning on the bottom bearing.

Dual Input with Two Switches

Illustration 9	g01260700
View of the MMS I/O Cabinet Dual Input with two Switches

Shutdown Procedure

1. Perform "System Pre-Shutdown".

2. Turn the key switch (12) on the System cabinet to the BYPASS position. Refer to Illustration 5.

3. Turn the key switch (13) on each Multiple Module Unit (MMU) to the BYPASS position. Refer to Illustration 6.

4. Verify that the system is in Bypass mode. Press the "Home" soft key (19) that is located on the User Interface Panel. Observe the status line on the LCD (20). Refer to Illustration 5.
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   NOTICE
   If the system does not enter the Bypass mode, Do Not Proceed with this procedure. Equipment damage or load interruption may occur. Contact technical support.

   Note: The output of the UPS will be disconnected and/or de-energized by continuing with this procedure.

5. Open the Output Isolation Switch (16) that is located on the Input/Output cabinet. Refer to Illustration 7.

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

7. Open the Input Isolation Switches (3) ( 5) ( 7) ( 9) that are located in the System cabinet for the appropriate MMU. Refer to Illustration 4.

8. Remove facility power from the System Input Bus (2). Refer to Illustration 3.

9. Remove facility power from the Bypass Input Bus (18). Refer to Illustration 8.

10. Allow the capacitor to discharge for approximately 5 minutes.

    Note: When the flywheel is spinning, the following components are energized: the DC bus and the armature leads. Accomplish the procedure as quickly as possible. During the procedure, the rotor is spinning on the bottom bearing.

Dual Input with Three Switches

Illustration 10	g01260973
View of the MMS I/O Cabinet Dual Input with three Switches (21) Bypass Input Switch

Shutdown Procedure

1. Perform "System Pre-Shutdown".

2. Turn the key switch (12) on the System cabinet to the BYPASS position. Refer to Illustration 5.

3. Turn the key switch (13) on each Multiple Module Unit (MMU) to the BYPASS position. Refer to Illustration 6.

4. Verify that the system is in Bypass mode. Press the "Home" soft key (19) that is located on the User Interface Panel. Observe the status line on the LCD (20). Refer to Illustration 5.
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   NOTICE
   If the system does not enter the Bypass mode, Do Not Proceed with this procedure. Equipment damage or load interruption may occur. Contact technical support.

   Note: The output of the UPS will be disconnected and/or de-energized by continuing with this procedure.

5. Open the Output Isolation Switch (16) that is located on the Input/Output cabinet. Refer to Illustration 7.

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

7. Open the Input Isolation Switches (3) ( 5) ( 7) ( 9) that are located in the System cabinet for the appropriate MMU. Refer to Illustration 4.

8. Remove facility power from the System Input Bus (2). Refer to Illustration 3.

9. Open the Maintenance Bypass Switch (14) that is located in the Input/Output Cabinet. Refer to Illustration 7.

10. Remove facility power from the Bypass Input Bus (18). Refer to Illustration 8.

11. Allow the capacitor to discharge for approximately 5 minutes.

    Note: When the flywheel is spinning, the following components are energized: the DC bus and the armature leads. Accomplish the procedure as quickly as possible. During the procedure, the rotor is spinning on the bottom bearing.