LINER 5573515 - Caterpillar

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
Make sure that the keyswitch is in the Bypass position when you use this option. Machine damage may occur if the keyswitch is not in the Bypass position when placing the UPS in 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 devicesNote: 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