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

Remote Emergency Power Off

Illustration 1	g00741799
Remote Emergency Power Off

The "REPO" button is used to initiate an Emergency Shutdown of the system. This will disconnect the power to the load of the UPS.

Illustration 2	g01107554
Remote Input Block

Configuring the Normally Open Contact

To use the normally open contacts in the Emergency Power Off switch, run wires from pin 3 and pin 4 in the EPO switch to the Remote Input Block that is located on the System I/O Module.

Note: If the normally closed remote switch is not used, the normally closed pair of contacts must be jumpered for normal operation.

Configuring the Normally Closed Contact

To use the normally closed contacts in the EPO switch, remove the jumper wire and run wires from pin 1 and pin 2 in the EPO switch to the Remote Input Block that is located on the System I/O Module.

Note: The System I/O Module is located on the Left Component panel in the lower left hand corner. See Operation and Maintenance Manual, "Interfaces".

Emergency Module Off (EMO)

The Emergency Module Off (EMO) option replaces the "EPO" buttons on the cabinets of systems with more than one flywheel power stage capability. The "EMO" button is blue in color. When the "EMO" button is pressed, the UPS is turned off and the load is transfered to bypass mode. If bypass power is not available, the power is turned off.

Emergency System Off (ESO)

The Emergency System Off (ESO) option replaces the Local EPO button on the system cabinet of the following systems: the UPS 225 Expandable, the UPS 250 Expandable, the UPS 300 Expandable, UPS 500 Expandable, UPS 600 Expandable, UPS 750 Expandable and UPS 900 Expandable. The "ESO" button is yellow in color. When the "EMO" button is pressed, the UPS is turned off and the load is transfered to bypass mode. The load is turned off only if bypass power is not available. In comparison, the standard EPO button turns off the automatic bypass and the MMU(s). This means that power to the load is interrupted. The "ESO" button does not affect the bypass. Manual operation is required in order to turn the Bypass on and off. The "ESO" option is not available on the following single module systems: UPS 250 and UPS 300.

Illustration 3	g00760252
(13) Emergency Power Off Reset Circuit Breaker

The following procedures must be done in order to restart the system after using the "EPO/ESO" button:

1. Reset the system cabinet Emergency Power Off Circuit Breaker. The circuit breaker is located inside the left front door of the system cabinet. See Illustration 3.

2. Reset the Emergency Power Off Circuit Breakers in all of the Multiple Module Units.

3. Turn the keyswitch that is located on the system cabinet to the "Reset" position.

Static Bypass Switch

This option ensures that there is no break in the transition from normal operation to bypass operation in the event of a catastrophic internal failure or UPS overload. Silicon Controlled Rectifiers (SCR) are used to instantly connect the bypass source to the output. Thus, the output contactor is commanded to open and the bypass contactor is commanded to close. This results in a make-before-break switch operation.

Note: The bypass contactor is in parallel with the static switch.

Maintenance Bypass

The bypass option allows complete isolation of the system in order to perform maintenance on the UPS without interruption to the load. This option is available in the following configurations:

• Single input with a bypass for 3 devices

• Dual input with a bypass for 3 devices

• Dual input with a bypass for 2 devices

Note: The single input with a bypass for 3 devices is not available on UPS 750 and UPS 900.

Note: Dual input systems require the inputs to come from common synchronized sources.

Dual Input - without Maintenance Bypass

This option can accommodate two input sources. The two input sources must be derived from a common source when the bypass is not required. The two input sources must be derived from a common source when a separate bypass will be used. Inputs for the UPS and the internal bypass are separated.

Four-Wire Input and Output (480 Volt 60 Hz)

This option is used when a neutral connection is required.

Three-Wire Input and Output (380 - 415 Volt 50/60 Hz)

This option can be used when loads are fed from a distribution transformer.

Redundant (N+1) Flywheel and Power Stage Expansion

This option allows an additional MMU to be added to the system. The additional MMU can be used to add an additional Power Stage for Redundant (N+1) use. The following components are needed for this option: an additional power stage, isolation switches and wireway.

Adding Additional Power Stages in the Field

This option allows an additional power stage to be added to the system in the field.

Connection Socket

This option is the bus bar which is required for each additional power stage that might be added in the future.

Isolation Switches

This option electrically isolates individual power stages of the UPS in order to perform the maintenance. This option isolates redundant power stages. This option makes sure that the protected power for the load is maintained.

Synchronizing to an External Source

This option provides synchronization of the UPS with an external source. This option ensures a synchronous transfer to redundant UPS systems that are powered from a source that may be non-synchronous.

Wire Kits and Wireway Kits

This option provides the interconnection wire and the wireway for the field expansion of the power stages on the UPS.

Ready Kits

This option provides a spare parts kit for repair of the UPS.

Kick Plates

Kick plates are covers that are held by clips. Kick plates are used to cover the gap between the cabinet and the floor.

Seismic Tie-down

This option provides tie-down brackets in order to secure the following cabinets of the UPS to the floor: Multiple Module, Input/Output and System.

System Cabinet and Input/Output Cabinet

The following information explains the requirements for seismic anchoring of the System Cabinets and the Input/Output Cabinets.

Illustration 4	g00990731
System Cabinet and Input/Output Cabinet

Provide a floor structure that is capable of supporting the weight of the equipment and the following forces for the anchors:

Vmax ... 654 pounds per anchor

Tmax ... 1041 pounds per anchor

• Install the expansion anchors according to the ICBO Report ER-4627 recommendations.

• Test a minimum of 50% of the installed expansion anchors to a torque of 108.47 N·m (80.00 lb ft) per CBC 1925B.3.5. For acceptance, the torque must be reached within one-half turn of the nut. Test the torque no less than 24 hours after the installation of the anchor. If any anchor fails testing, test all anchors. Test equipment shall be calibrated by an approved testing laboratory in accordance with standard recognized procedures.

• Use through bolts instead of expansion anchors for applications that are on concrete slabs with a thickness that is between 63.50 mm (2.50 inch) and 127.00 mm (5.00 inch), and a minimum compressive strength of 20.69 MPa (3000.00 psi).

• Anchorage design is in accordance with the 1198 California Building Code of Emeregencey Power Supply Systems. FP = 0.6Wp; Fv = 0.2Wp

Through Bolt A307 ... 117.475 mm (4.625 inch)

Multiple Module Unit

The following information explains the requirements for seismic anchoring of the Multiple Module Unit.

Illustration 5	g00990733

Provide a floor structure that is capable of supporting the weight of the equipment and the following forces for the anchors:

Vmax ... 1000 pounds per anchor

Tmax ... 1200 pounds per anchor

• Install the expansion anchors according to ICBO Report ER-4627.

• Test a minimum of 50% of the installed expansion anchors to a torque of 108.47 N·m (80.00 lb ft) per CBC 1925B.3.5. For acceptance, the torque must be reached within one-half turn of the nut. Test the torque no less than 24 hours after the installation of the anchor. If any anchor fails testing, test all anchors. Test equipment shall be calibrated by an approved testing laboratory in accordance with standard recognized procedures.

• Use through bolts instead of expansion anchors for applications that are on concrete slabs with a thickness that is between 63.50 mm (2.50 inch) and 127.00 mm (5.00 inch), and a minimum compressive strength of 20.69 MPa (3000.00 psi).

• Anchorage design is in accordance with the 1198 California Building Code of Emeregencey Power Supply Systems. FP = 0.6Wp; Fv = 0.2Wp

Through Bolt A307 ... 117.475 mm (4.625 inch)