HOUSING AS 3616731 - Caterpillar

Major Components
3-Wire System
Illustration 1 g01104567
The major 3-Wire UPS system components and the cabinets in which they are located are shown in the following list:
Input circuit breaker (K1) - I/O Cabinet
Bypass static switch - Static Switch Cabinet
Line static switch - Static Switch Cabinet
Line Inductor - Static Switch Cabinet
Inverter 1 contactor (K3) - Controls Cabinet
Inverter 2 contactor (K4) - Controls Cabinet
Filter Inductors - Controls Cabinet
Utility Inverter 1 - Inverter Cabinet
Utility Inverter 2 - Inverter Cabinet
Output (K5) - I/O CabinetNote: "K5" with a maintenance bypass is a motorized output circuit breaker.Note: "K5" without maintenance bypass and with output isolation, "K5" is an output isolation switch.Note: If there is no output isolation, then there is neither a switch nor a breaker.
The CSHV cabinets contain the following components:
DC Disconnect Switch
Flywheel A Inverter
Flywheel B Inverter
Flywheel A
Flywheel BBecome familiar with the components of the system. Become familiar with the designations of the components and the location of the components in the system. The system records and displays messages that refer to these components and their operating states.The DC bus is common to the inverter cabinet and the CSHVs that make up the system. The DC Bus is located in the wireway above the inverter and CSHV cabinets. Each CSHV has a manually operated internal DC disconnect switch, which is used to isolate it from the rest of the system. The CSHV must be isolated for safety reasons when being serviced.4-Wire System
Illustration 2 g01104610
The major 4-Wire UPS system components and the cabinets in which they are located are shown in the following list:
Input circuit breaker (K1) - I/O Cabinet
Bypass static switch - Static Switch Cabinet
Line static switch - Static Switch Cabinet
Line Inductor - Static Switch Cabinet
Inverter 1 contactor (K3) - Controls Cabinet
Inverter 2 contactor (K4) - Controls Cabinet
Filter Inductors - Controls Cabinet
Utility Inverter 1 - Inverter Cabinet
Utility Inverter 2 - Inverter Cabinet
Output (K5) - I/O CabinetNote: "K5" with a maintenance bypass is a motorized output circuit breaker.Note: "K5" without maintenance bypass and with output isolation, "K5" is an output isolation switch.
The CSHV cabinets contain the following components:
DC Disconnect Switch
Flywheel A Inverter
Flywheel B Inverter
Flywheel A
Flywheel BBecome familiar with the components of the system. Become familiar with the designations of the components and the location of the components in the system. The system records and displays messages that refer to these components and their operating states.The DC bus is common to the inverter cabinet and the CSHVs that make up the system. The DC Bus is located in the wireway above the inverter and CSHV cabinets. Each CSHV has a manually operated internal DC disconnect switch, which is used to isolate it from the rest of the system. The CSHV must be isolated for safety reasons when being serviced.Cabinets
Input Output Cabinet (IO cabinet)
The Input Output (I/O) cabinets primary function is cable landing of the input and output wiring. Refer to the following list for the components that are found in the I/O cabinet.
Circuit Breaker - K1
Ground Bus Bar
Output Isolation Switch - K5 (Optional)
Conduit Entry
Input Bus bars
Generator Start Module (Breakers)
Output Bus