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Caterpillar UPS 750
Maintenance schedule, common problems & OEM parts breakdown
The Cat UPS 750 is a stationary, battery-free flywheel energy-storage module rated 750 kVA (675 kW) at 480 volts, 60 Hz, three-phase, built to bridge a critical electrical load the instant utility power fails. In place of a bank of batteries it spins a steel flywheel up to speed and holds it there with a small trickle of charging current; when input power drops out, an IGBT-based bi-directional converter draws down the flywheel's stored momentum to keep output voltage clean for roughly fifteen seconds to a minute, long enough for a separate standby diesel generator set to start and take the load. A single cabinet weighs approximately 4242 kg (9350 lb) and can be run as a standalone Single Module System (SMS) or paralleled with up to six additional modules into a Multi-Module System (MMS) for greater capacity or N+1 redundancy. It sits in Caterpillar's flywheel UPS lineup alongside smaller single-module products and the newer, higher-capacity Z-Series modules, which parallel only with each other.
Successive versions of this power class have pushed power density up by roughly 50 percent over earlier flywheel designs while shrinking the footprint compared with traditional double-conversion battery UPS, and system efficiency now runs as high as 98 percent with a full 40°C rating across the entire unit including the energy-storage stage. Because the design stores energy mechanically rather than chemically, there is no battery string to age out and replace every few years; wear instead concentrates in the bearing cartridge, the vacuum pump that maintains the low-drag flywheel chamber, and the converter and switching electronics. That distinction matters in the used and parts market: data centers, hospitals, and other critical facilities value these modules for a long, predictable service life and a parts trail built around bearings, vacuum pumps, converter boards, and static switches rather than recurring battery replacement, making well-maintained used UPS 750 modules and their rebuild components a steady source of demand for facilities standardizing on flywheel backup power.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Caterpillar UPS 750 specifications
Power System
| Configuration | Stationary flywheel-based line-interactive static UPS module. IGBT bi-directional converter, no engine, fuel system, or crankcase. Single 750 kVA rating published; no lettered generations or series changes documented. |
| Rated power | 750 kVA (675 kW), 60 Hz, 480 V 3-phase |
| Normal AC input | 480 VAC 3-phase L-L plus ground; input voltage range +10%/-15% (programmable); frequency 60 Hz +/-10% max (programmable), +/-3% default; input power factor 0.99 at rated load and nominal voltage; max continuous input current 1200 A |
| Output | 480 VAC 3-phase, 3-wire plus ground; rated output current 903 A |
| System efficiency | Up to 97.5% per factory technical data table (dealer overview literature cites up to 98%) |
| Expandability | Modules can be paralleled, rated for up to 7 units in a system |
Weights
| Module weight | 4242 kg (9350 lbs) |
| Configuration note | One weight figure published for the 750 kVA / 480 V / 60 Hz module. No separate shipping weight or per-option weight breakout documented. |
Dimensions
| Depth | 998 mm (39.3 in) |
| Width | 3353 mm (132 in) |
| Height | 2032 mm (80 in) |
| Footprint / access | Marketed as the smallest available footprint in its power class; cable entry from top or bottom |
Electrical Performance
| Voltage regulation | +/-2% of nominal for +/-10% input change (steady state); +/-1% within 50 ms for a 100% load step (transient); +/-1% steady state in flywheel mode |
| Frequency regulation | Input-synchronized; +/-0.2% free-running; slew rate adjustable 0.2 to 3.0 Hz/second |
| Overload capability | Continuous up to 105% of rating; under 110% for 10 minutes; under 125% for 5 minutes; under 150% for 10 seconds; under 200% for 10 milliseconds |
| Harmonic distortion | Input current distortion under 3% at 100% linear load, under 4% at 100% non-linear load; output voltage THD under 3% at 100% resistive load, under 5% at 100% non-linear load per EN 62040-3 |
| Flywheel ride-through | Approximate ride-through at rated frequency: 15 seconds at 100% load, 20 seconds at 75% load, 29 seconds at 50% load, 59 seconds at 25% load |
| Flywheel recharge time | Under 2 minutes nominal at a 175 kW charge rate; 3 minutes at a programmable 100 kW charge rate |
Environmental & Standards Data
| Acoustical noise | Under 83 dBA at 1 meter |
| Operating temperature | 0 to 40 C (32 to 104 F); full 40 C rating covers the entire system including energy storage |
| Storage temperature | -25 to 70 C (-13 to 158 F) |
| Operating humidity | 5 to 95%, non-condensing |
| Operating altitude | Up to 1000 m (3280 ft) before derating is required |
| Heat rejection | 20.4 kW (69,757 BTU/hr) at rated load |
| Standards and approvals | Surge withstand per IEEE 587/ANSI C62.41; safety listed to UL 1778 and CSA C22.2; emissions/immunity per FCC Class A Part 15 Subpart J and EN 62040-2 |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Caterpillar UPS 750 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
| Every 8,000 h |
|
Servicing the UPS 750 beyond the schedule
Predictive Maintenance and Fluid Analysis
The UPS 750 has no engine oil to sample. Track flywheel bearing lubricant condition and purge patterns instead of an oil report, and log vacuum chamber pressure to catch pump wear before it shows up as bearing drag. Pull vibration signatures at the bearing housing at each inspection and compare them against the original commissioning baseline. Review the touchscreen HMI event history for early IGBT converter thermal warnings or repeated static switch transfers, both early indicators of component fatigue before a failure interrupts ride-through performance.
Corrective and Common Repairs
Most UPS 750 service calls trace to the static bypass switch, the IGBT converter, or a cooling fan, not the flywheel itself. A stuck or slow-transferring bypass switch shows up as a bypass-to-online transfer glitch; replace the switch contacts rather than the whole assembly. Converter faults usually present as a derated output or a converter alarm on the HMI and call for module-level IGBT replacement. Redundant cooling fans should be swapped in pairs once one shows bearing noise or reduced airflow, protecting the electronics cabinet from heat soak.
Overhaul and Rebuild Points
Because the UPS 750 stores energy mechanically, its overhaul list looks nothing like an engine teardown. The flywheel bearing cartridge is the highest-wear item and is designed as a field-exchangeable unit; the magnetic-unloading system carries most of the rotor weight, but the cartridge still needs periodic replacement. The vacuum pump that maintains the low-drag chamber wears out on its own multi-year clock and should be rebuilt before it fails, not after. Converter capacitor banks age out over a similar horizon and are worth replacing together.
Seasonal and Environment Servicing
The UPS 750 cabinet is rated for 0 to 40°C ambient, so room cooling failures stress it as hard as any electronic switchgear. Confirm HVAC redundancy in the UPS room each season and temper expectations if the site sits above 1000 m elevation, where output derates. Humidity tolerance runs 5 to 95 percent non-condensing, but condensation risk climbs whenever the room cycles between hot and cool; keep the cabinet air filters clean and the intake and exhaust paths clear of dust and stored material to protect the converter and control electronics.
UPS 750 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 240-2526 | Filter Element-Encl Air | Air intake service | Check fitment → |
| 180-6264 | Filter Element As-Encl Air | Air intake service | Check fitment → |
| 180-6265 | Filter Element As-Encl Air | Air intake service | Check fitment → |
| 259-3199 | Board As-Circuit | Scheduled service item | Check fitment → |
| 180-6228 | Board As | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
UPS 750 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| DC BUS OVER VOLTAGE | DC link between the flywheel inverter and utility inverter has risen above safe limits | Load rejection, regen event from the flywheel converter, or a bus capacitor/inverter control fault | Check load step history, inspect converter and bus capacitor bank, verify utility inverter regulation before reset |
| DC BUS UNDER VOLTAGE | DC link voltage has dropped below the threshold needed to support the output inverter | Flywheel discharged below usable energy, charger/converter fault, or input power loss beyond ride-through | Confirm utility input status, check flywheel charge state and converter output, inspect for tripped input breaker |
| FLYWHEEL OVERSPEED | Flywheel rotor speed exceeded its normal operating band | Speed control/converter regulation fault or sensor fault feeding the flywheel drive | Take module offline, verify flywheel speed sensor and inverter control loop before returning to service |
| FLYWHEEL UNDERSPEED / LOW ENERGY | Flywheel rotor speed or stored energy has fallen below the level needed to ride through an outage | Extended discharge event, bearing drag, or charge circuit fault preventing recharge | Verify recharge cycle completes per spec, check bearing and vacuum/containment health, inspect charge converter |
| STATIC SWITCH / TRANSFER FAULT | Static bypass switch failed to transfer load between inverter and bypass source as commanded | SCR/thyristor fault in the static switch, control logic fault, or loss of sync between inverter and bypass input | Check static switch SCR gating and cooling, verify bypass input sync status, do not leave load unprotected |
| CONVERTER / IGBT FAULT | Fault detected in the IGBT-based bi-directional converter (flywheel or utility inverter stage) | IGBT overcurrent, overtemperature, gate-drive fault, or short circuit on the converter output | Inspect converter heatsink and cooling, check for shorted output wiring, replace faulted IGBT module per dealer procedure |
| COOLING FAN FAULT | One or more redundant cooling fans reporting failure to run or reduced airflow | Fan motor failure, blocked filter/airflow path, or fan control board fault | Inspect and clean air filters, verify fan rotation, replace failed fan module; unit can run on remaining redundant fans short-term |
| CONTROL POWER FAULT | Loss of one leg of the redundant control power supply feeding the logic/monitoring boards | Failed control power supply module or wiring fault | Check redundant control power supply status on the touch-screen, replace faulted supply, confirm backup leg is carrying control loads |
| MODULE ON BYPASS | Load has been transferred to the bypass/utility line and is not protected by the flywheel/inverter path | Manual bypass command, inverter or static switch fault, or maintenance bypass in use | Determine why the module is on bypass, clear any underlying fault, return to normal (double-conversion/line-interactive) mode once cleared |
| LOSS OF REDUNDANCY / MODULE FAULT (PARALLEL SYSTEM) | In a paralleled configuration (up to seven modules), one module has dropped offline, reducing system redundancy | Individual module fault (converter, static switch, or flywheel) taking that module out of the parallel bus | Identify the faulted module from the system display or UPS View software, isolate it, and service before load grows beyond remaining capacity |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
UPS 750 attachments & work tools
Generator set start (cranking-assist) module
Optional module that draws on the flywheel's stored energy to give a companion standby genset a redundant, high-reliability cranking source. Intended for continuous-power configurations where the UPS and genset run together, improving start reliability over battery-only cranking.
Static bypass and maintenance bypass switching
A static bypass switch is standard, transferring load to raw utility power automatically on a UPS fault or overload. An external maintenance bypass control (a logic board operating motorized bypass and isolation breakers) is offered as an option so the module can be fully isolated for service without dropping the load.
Multi-module paralleling
Units can be paralleled up to 7 modules for added capacity or N+1 redundancy. Paralleled installations use a shared input/output cabinet with individual flywheel power units (FPUs); each module's line static switch and inverter can be taken offline independently for maintenance without interrupting the bus.
Remote monitoring and communications package
Optional remote SNMP/MODBUS monitoring, a remote status panel (eight status LEDs), and remote emergency-power-off wiring extend the standard integral modem, Ethernet/e-mail alerting, and real-time monitoring software to a building management or NOC system.
External synchronization
Optional input allowing the UPS output to synchronize to an external frequency reference instead of its own internal input, used where the module must track a separate source or genset.
Cabinet and enclosure arrangement
Base configuration is a single flywheel cabinet with integrated bypass; larger or paralleled installations add a separate system I/O cabinet and one Multi-Module Unit cabinet per additional flywheel/vacuum-pump set. Dual-input/dual-output wiring arrangements are supported through the one-line configuration rather than a bolt-on kit.
Operator interface and local controls
Standard 10 inch color touch-screen operator interface with local emergency-power-off control, programmable input/output contacts, and top or bottom cable entry; these are fixed standard equipment rather than selectable options.
All UPS 750 assemblies by section
Every catalogued assembly group for the Caterpillar UPS 750. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Electrical And Starting System
228-4095 Adapter Gp-Communication -Ethernet Hub
| 22***95 | Adapter Group-Communication; -Ethernet Hub | 1 |
228-4090 Adapter Gp-Communication -Ethernet
| 22***90 | Adapter Group-Communication; -Ethernet | 1 |
| 30***89 | Adapter-Communication; (Ethernet Hub), Hexagon Head Cap Screw; M10 X 1.50 X 55 | 1 |
228-4105 Adapter Gp-Communication -Ethernet Hub
| 22***95 | Adapter Group-Communication; -Ethernet Hub | 1 |
| 22***05 | Adapter Group-Communication; -Ethernet Hub | 1 |
| 26***28 | Cable; (6-Foot) | 1 |
255-6646 Adapter Gp-Communication -Ethernet Hub
| 24***09 | Transformer | 1 |
| 25***46 | Adapter Group-Communication; -Ethernet Hub | 1 |
| 30***89 | Adapter-Communication; (Ethernet Hub), Hexagon Head Cap Screw; M10 X 1.50 X 55 | 1 |
255-6649 Adapter Gp-Communication -Ethernet Hub
| 22***05 | Adapter Group-Communication; -Ethernet Hub | 1 |
| 25***49 | Adapter Group-Communication; -Ethernet Hub | 1 |
206-8863 Adapter Gp-Communication
| 20***63 | Adapter Group-Communication | 1 |
255-6647 Adapter Gp-Communication -Ethernet Hub
| 22***05 | Adapter Group-Communication; -Ethernet Hub | 1 |
| 24***09 | Transformer | 1 |
| 25***47 | Adapter Group-Communication; -Ethernet Hub | 1 |
248-8796 Adapter Gp-Communication -Ethernet
| 24***96 | Adapter Group-Communication; -Ethernet | 1 |
228-4094 Adapter Gp-Communication -Ethernet
| 22***94 | Adapter Group-Communication; -Ethernet | 1 |
| 22***05 | Adapter Group-Communication; -Ethernet Hub | 1 |
255-6648 Adapter Gp-Communication -Ethernet Hub
| 22***95 | Adapter Group-Communication; -Ethernet Hub | 1 |
| 25***48 | Adapter Group-Communication; -Ethernet Hub | 1 |
228-4089 Adapter Gp-Communication -Ethernet
| 22***89 | Adapter Group-Communication; -Ethernet | 1 |
| 22***05 | Adapter Group-Communication; -Ethernet Hub | 1 |
| 24***09 | Transformer | 1 |
201-2605 Board As-Circuit -Fan Monitor
| 20***05 | Board As-Circuit; -Fan Monitor | 1 |
| 24***46 | Fuse; (3.15-Ampere) | 6 |
226-5485 Board As-Circuit -System I/O, Daughter
| 20***59 | Cable As | 1 |
| 20***60 | Cable As | 1 |
| 22***85 | Board As-Circuit; -System I/O, Daughter | 1 |
201-2604 Board As-Circuit -Ac Interface
| 18***60 | Fuse; (2-Ampere) | 1 |
| 20***04 | Board As-Circuit; -Ac Interface | 1 |
| 23***53 | Fuse; (5-Ampere) | 4 |
235-6333 Board As-Circuit -Electro Magnetic Interference
| 23***51 | Capacitor | 3 |
| 23***33 | Board As-Circuit; -Electro Magnetic Interference | 1 |
259-3199 Board As-Circuit -Emi Filter
| 24***51 | Capacitor | 6 |
| 25***99 | Board As-Circuit; -Emi Filter | 1 |
201-3177 Board As-Circuit -Power Distribution
| 18***55 | Fuse; (3-Ampere)(Output) | 5 |
| 20***67 | Fuse; (1-Ampere) | 5 |
| 20***69 | Fuse; (2-Ampere) | 1 |
243-2251 Board As-Circuit -Controller
| 20***71 | Diskette | 1 |
| 20***76 | Diskette | 1 |
| 23***29 | Battery; (Lithium) | 1 |
243-2250 Board As-Circuit -Controller
| 23***29 | Battery; (Lithium) | 1 |
| 24***50 | Board As-Circuit; -Controller | 1 |
242-9378 Board As-Circuit -Fan Monitor
| 24***46 | Fuse; (3.15-Ampere) | 6 |
| 24***78 | Board As-Circuit; -Fan Monitor | 1 |
259-3201 Board As-Circuit -Interface
| 24***46 | Fuse; (3.15-Ampere) | 1 |
| 25***01 | Board As-Circuit; -Interface | 1 |
201-2706 Board As-Circuit -Power Distribution
| 18***54 | Fuse; (20-Ampere)(Output) | 2 |
| 19***99 | Fuse; (10-Ampere) | 4 |
| 20***67 | Fuse; (1-Ampere) | 2 |
201-2188 Board As-Circuit -System Input/Output
| 18***60 | Fuse; (2-Ampere) | 4 |
| 19***04 | Fuse; (3-Ampere) | 1 |
| 20***88 | Board As-Circuit; -System Input/Output | 1 |
242-7424 Board As-Circuit
| 24***24 | Board As-Circuit | 1 |
180-6221 Board As-Circuit -Static Switch Interface
| 18***21 | Board As-Circuit; -Static Switch Interface | 1 |
| 29***60 | Cable As | 1 |
226-5486 Board As-Circuit -System I/O, Daughter
| 20***26 | Resistor; -Termination | 1 |
| 22***86 | Board As-Circuit; -System I/O, Daughter | 1 |
| 23***95 | Connector | 1 |
201-2190 Board As-Circuit -System Input/Output
| 18***60 | Fuse; (2-Ampere) | 2 |
| 20***73 | Fuse; (1-Ampere) | 1 |
| 20***90 | Board As-Circuit; -System Input/Output | 1 |
204-0303 Box Gp-Connection
| 18***28 | Board As; (Emi Filter)(Flywheel) | 1 |
| 19***75 | Fuse; (1000-Ampere) | 1 |
| 19***78 | Capacitor; (50vdc, Scr Term) | 2 |
207-8642 Box Gp-Connection
| 20***42 | Box Group-Connection | 1 |
| 23***19 | Clamp | 1 |
| 23***20 | Diode | 2 |
206-5380 Box Gp-Connection
| 20***80 | Box Group-Connection | 1 |
| 23***95 | Parts Group-Miscellaneous; (Genset Start Driver) | 1 |
| 23***34 | Parts Group-Miscellaneous; (Genset Start Driver) | 1 |
208-2265 Box Gp-Junction
| 20***65 | Box Group-Junction | 1 |
205-3120 Bus Bar Gp
| 20***20 | Bus Bar Group | 1 |
203-4296 Cable As-Communication
| 20***96 | Cable As-Communication | 1 |
203-4297 Cable As-Communication
| 20***97 | Cable As-Communication | 1 |
203-4227 Cable As-Communication
| 20***27 | Cable As-Communication | 1 |
203-5546 Cable Gp
| 18***67 | Cable As-Ribbon; (Ac Interface) | 1 |
| 18***70 | Cable As-Ribbon; (System Input, Output 1) | 1 |
| 18***72 | Cable As-Ribbon; (Static Switch) | 1 |
249-5620 Circuit Breaker Gp -Generator Start, Dual
| 24***20 | Circuit Breaker Group; -Generator Start, Dual | 1 |
| 25***67 | Cable As | 2 |
| 29***26 | Circuit Breaker; (40-Ampere) | 2 |
249-5617 Circuit Breaker Gp -Generator Start Module
| 24***17 | Circuit Breaker Group; -Generator Start Module | 1 |
| 25***67 | Cable As | 1 |
| 29***26 | Circuit Breaker; (40-Ampere) | 1 |
249-5622 Circuit Breaker Gp -Generator Start, Dual
| 24***22 | Circuit Breaker Group; -Generator Start, Dual | 1 |
| 25***67 | Cable As | 2 |
| 29***26 | Circuit Breaker; (40-Ampere) | 2 |
249-5619 Circuit Breaker Gp -Generator Start Module
| 24***19 | Circuit Breaker Group; -Generator Start Module | 1 |
| 25***67 | Cable As | 1 |
| 29***26 | Circuit Breaker; (40-Ampere) | 1 |
249-5618 Circuit Breaker Gp -Generator Start, Dual
| 24***18 | Circuit Breaker Group; -Generator Start, Dual | 1 |
| 25***67 | Cable As | 2 |
| 29***59 | Kit-Circuit Breaker; (40-Ampere) | 2 |
249-5621 Circuit Breaker Gp -Generator Start Module
| 24***21 | Circuit Breaker Group; -Generator Start Module | 1 |
| 25***67 | Cable As | 1 |
| 29***26 | Circuit Breaker; (40-Ampere) | 1 |
207-4323 Conduit Gp
| 20***23 | Conduit Group | 1 |
| 22***87 | Conduit Group | 1 |
226-4887 Conduit Gp
| 22***87 | Conduit Group | 1 |
| 27***83 | Cable; (24-Ga) | 2 |
| 27***84 | Cable; (24-Ga) | 1 |
207-4320 Conduit Gp
| 20***20 | Conduit Group | 1 |
| 22***86 | Conduit Group | 1 |
203-4683 Conduit Gp
| 20***83 | Conduit Group, .. Cyl. | 1 |
226-4886 Conduit Gp
| 22***86 | Conduit Group | 1 |
| 27***83 | Cable; (24-Ga) | 2 |
226-4883 Conduit Gp
| 22***83 | Conduit Group | 1 |
| 27***83 | Cable; (24-Ga) | 2 |
207-8641 Conduit Gp
| 20***41 | Conduit Group | 1 |
| 22***88 | Conduit Group; (Fourth Enclosure) | 1 |
207-4315 Conduit Gp
| 20***15 | Conduit Group | 1 |
| 22***83 | Conduit Group | 1 |
203-5456 Connection Gp-Electrical
| 20***56 | Connection Group-Electrical | 1 |
| 23***75 | Harness As-Wiring; (Ground) | 1 |
| 25***84 | Panel Group-Electrical | 1 |
203-4292 Connector -Ethernet
| 20***92 | Connector; -Ethernet | 1 |
200-8330 Contact As-Electrical
| 20***30 | Contact As-Electrical | 1 |
| 24***25 | Contact | 1 |
| 24***26 | Bracket | 1 |
229-2890 Conversion Gp-Communication -Modbus Functionality
| 22***90 | Conversion Group-Communication; -Modbus Functionality | 1 |
228-4112 Conversion Gp-Communication
| 22***12 | Conversion Group-Communication | 1 |
229-2889 Conversion Gp-Communication -Protocol Functionality
| 22***89 | Conversion Group-Communication; -Protocol Functionality | 1 |
228-4114 Conversion Gp-Communication
| 22***14 | Conversion Group-Communication | 1 |
226-5484 Conversion Gp-Communication
| 22***84 | Conversion Group-Communication | 1 |
203-3971 Diskette
| 20***71 | Diskette | 1 |
203-3976 Diskette
| 20***76 | Diskette | 1 |
243-9258 Fuse Gp
| 18***54 | Fuse; (20-Ampere)(Output) | 1 |
| 19***99 | Fuse; (10-Ampere) | 2 |
| 23***55 | Fuse; (7-Ampere) | 2 |
180-6295 Ground Gp-Electrical -Electrical Drain
| 18***95 | Ground Group-Electrical; -Electrical Drain | 1 |
| 20***30 | Contact As-Electrical | 1 |
| 23***35 | Seal-O-Ring | 1 |
203-4293 Installation Gp-Adapter
| 20***93 | Installation Group-Adapter | 1 |
| 24***09 | Transformer | 1 |
| 30***89 | Adapter-Communication; (Ethernet Hub), Hexagon Head Cap Screw; M10 X 1.50 X 55 | 1 |
293-5403 Kit-Switch -Emergency Power Off
| 28***13 | Switch As-Push Button; (Emergency Power Off) | 1 |
| 29***03 | Kit-Switch; -Emergency Power Off | 1 |
293-5402 Kit-Switch -Emergency Power Off
| 28***13 | Switch As-Push Button; (Emergency Power Off) | 1 |
| 29***02 | Kit-Switch; -Emergency Power Off | 1 |
203-5458 Panel Gp-Circuit Breaker
| 20***31 | Cable As; (Thyristor) | 1 |
| 20***90 | Fuse; (600-Ampere) | 1 |
| 20***71 | Diskette | 1 |
207-8726 Resistor -Termination
| 20***26 | Resistor; -Termination | 1 |
222-5438 Resistor As
| 22***38 | Resistor As | 1 |
199-5096 Switch As -Static Bypass-Static
| 18***21 | Board As-Circuit; -Static Switch Interface | 1 |
| 19***96 | Switch As; -Static Bypass-Static | 1 |
| 20***61 | Switch; (Static) | 1 |
251-4572 Switch As -Static Bypass
| 20***77 | Fuse; (200-Ampere) | 3 |
| 20***31 | Cable As; (Thyristor) | 1 |
| 20***06 | Board As; (Bypass Cabinet Control) | 2 |
259-3200 Switch As -Static Bypass
| 18***21 | Board As-Circuit; -Static Switch Interface | 1 |
| 20***39 | Cable As; (Static Switch Thermistor) | 1 |
| 24***22 | Thyristor | 3 |
203-5547 Switch As -Emergency Module Off
| 20***06 | Cable As; (System Cabinet Emo) | 1 |
| 20***47 | Switch As; -Emergency Module Off | 1 |
| 22***41 | Cover; (Switch) | 1 |
250-5523 Switch As -Static Bypass
| 18***21 | Board As-Circuit; -Static Switch Interface | 1 |
| 20***39 | Cable As; (Static Switch Thermistor) | 1 |
| 20***89 | Suppressor As-Arc; (Static Switch) | 3 |
294-5574 Switch As-Push Button -Emergency Power Off
| 28***13 | Switch As-Push Button; (Emergency Power Off) | 1 |
| 29***74 | Switch As-Push Button; -Emergency Power Off | 1 |
294-7319 Switch As-Push Button -Emergency Power Off
| 28***13 | Switch As-Push Button; (Emergency Power Off) | 1 |
| 29***19 | Switch As-Push Button; -Emergency Power Off | 1 |
203-4325 Switch Gp-Disconnect
| 20***07 | Varistor As; (Surge Protector)(Ac) | 2 |
| 20***08 | Disconnect; (400-Ampere, 3-Pole) | 8 |
| 20***25 | Switch Group-Disconnect | 1 |
203-4324 Switch Gp-Disconnect
| 20***07 | Varistor As; (Surge Protector)(Ac) | 2 |
| 20***08 | Disconnect; (400-Ampere, 3-Pole) | 6 |
| 20***24 | Switch Group-Disconnect | 1 |
203-4323 Switch Gp-Disconnect
| 20***07 | Varistor As; (Surge Protector)(Ac) | 2 |
| 20***08 | Disconnect; (400-Ampere, 3-Pole) | 4 |
| 20***23 | Switch Group-Disconnect | 1 |
307-6546 Switch Gp-Disconnect
| 24***07 | Handle | 1 |
| 25***57 | Shaft | 1 |
| 30***46 | Switch Group-Disconnect | 1 |
183-9379 Switch Gp-Remote
| 18***79 | Switch Group-Remote | 1 |
| 25***72 | Switch-Push Button; (Remote Emergency Stop) | 1 |
254-9922 Transformer As
| 24***23 | Transformer | 1 |
| 25***22 | Transformer As | 1 |
261-1004 Varistor As
| 26***04 | Varistor As | 1 |
Enclosures, Guards And Bases
199-5106 Fan As-Circulating
| 19***06 | Fan As-Circulating | 1 |
| 20***61 | Switch-Limit; (Fan) | 1 |
| 26***63 | Impeller; (230-Volt) | 1 |
203-1007 Fan Gp-Circulating
| 19***25 | Damper As; (Fan) | 1 |
| 19***06 | Fan As-Circulating | 1 |
| 20***29 | Screen; (Fan) | 1 |
203-5453 Fastener Gp-Enclosure -Template
| 20***53 | Fastener Group-Enclosure; -Template | 1 |
203-5452 Fastener Gp-Enclosure
| 20***52 | Fastener Group-Enclosure | 1 |
203-5451 Fastener Gp-Enclosure
| 20***51 | Fastener Group-Enclosure | 1 |
258-8806 Handle As
| 24***13 | Handle; (Maintenance Bypass) | 3 |
| 25***06 | Handle As | 1 |
258-8805 Handle As
| 24***13 | Handle; (Maintenance Bypass) | 3 |
| 25***05 | Handle As | 1 |
203-4319 Kickplate
| 20***19 | Kickplate | 1 |
203-4322 Kickplate
| 20***22 | Kickplate | 1 |
206-8862 Kickplate
| 20***62 | Kickplate | 1 |
203-4320 Kickplate
| 20***20 | Kickplate | 1 |
203-4321 Kickplate
| 20***21 | Kickplate | 1 |
203-4318 Kickplate
| 20***18 | Kickplate | 1 |
Operator Station
201-7672 Control As-Synchronizing
| 20***63 | Fuse; (1.5-Ampere) | 3 |
| 20***72 | Control As-Synchronizing | 1 |
| 24***20 | Block-Fuse; (3-Pole) | 1 |
130-3349 Control Gp-Alarm Module
| 13***49 | Control Group-Alarm Module | 1 |
| 3J***54 | Packing,Preformed Part Of Kit P/N 5r***27 | 1 |
| 9S***02 | Plug-O-Ring; (Straight Thread O-Ring) | 1 |
207-8751 Conversion Gp-Load Cell
| 18***35 | Bearing As; (Upper Flywheel) | 1 |
| 20***51 | Conversion Group-Load Cell | 1 |
| 22***42 | Seal-O-Ring | 1 |
202-7510 Filter As-Electrical -Phase C
| 18***43 | Resistor As; (Bleeder) | 4 |
| 20***46 | Capacitor | 16 |
| 20***10 | Filter As-Electrical; -Phase C | 1 |
227-4834 Filter As-Electrical
| 20***28 | Capacitor | 12 |
| 22***34 | Filter As-Electrical | 1 |
259-3197 Filter As-Electrical -Ac
| 24***42 | Capacitor; (600-Volt) | 6 |
| 25***97 | Filter As-Electrical; -Ac | 1 |
| 25***98 | Cable | 2 |
222-5440 Filter As-Electrical
| 22***38 | Resistor As | 6 |
| 22***39 | Capacitor; (600vac) | 12 |
| 22***40 | Filter As-Electrical | 1 |
202-7508 Filter As-Electrical -Phase B
| 18***43 | Resistor As; (Bleeder) | 4 |
| 20***46 | Capacitor | 16 |
| 20***08 | Filter As-Electrical; -Phase B | 1 |
202-7507 Filter As-Electrical -Phase A
| 18***43 | Resistor As; (Bleeder) | 4 |
| 20***46 | Capacitor | 16 |
| 20***07 | Filter As-Electrical; -Phase A | 1 |
250-5511 Filter As-Electrical -Ac
| 24***42 | Capacitor; (600-Volt) | 12 |
| 25***11 | Filter As-Electrical; -Ac | 1 |
202-9760 Flywheel Gp-Power Supply
| 18***95 | Ground Group-Electrical; -Electrical Drain | 1 |
| 20***52 | . Coller, Sensor-Vacuum; (Flywheel Bearing) | 1 |
| 20***60 | Flywheel Group-Power Supply | 1 |
227-7457 Flywheel Gp-Power Supply
| 19***80 | Kit-Shim; (Includes 15-Shims)(Upper Bearing) | 1 |
| 20***52 | . Coller, Sensor-Vacuum; (Flywheel Bearing) | 1 |
| 22***41 | Screw; (5/16-18x0.875-In) | 16 |
244-1409 Flywheel Gp-Power Supply
| 22***41 | Screw; (5/16-18x0.875-In) | 16 |
| 22***42 | Seal-O-Ring | 1 |
| 22***90 | Kit-Shim; (Includes 5-Shims)(Lower Bearing) | 1 |
201-2679 Module As -Systems User Interface
| 20***31 | Switch-Push Button; (Emergency Module Off) | 1 |
| 20***32 | Switch-Push Button; (Horn Silence) | 1 |
| 20***33 | Switch; (Key)(Emergency Stop) | 1 |
259-3195 Module As -Controller
| 24***67 | Capacitor; (1200-Volt) | 3 |
| 24***68 | Capacitor; (500-Volt) | 6 |
| 25***95 | Module As; -Controller | 1 |
202-7596 Module As -System User Interface
| 18***86 | Cable As-Ribbon; (User Interface Lcd) | 1 |
| 20***31 | Switch-Push Button; (Emergency Module Off) | 1 |
| 20***33 | Switch; (Key)(Emergency Stop) | 1 |
250-5510 Module As -Field Coil Driver
| 25***10 | Module As; -Field Coil Driver | 1 |
259-3196 Module As -Utility
| 24***67 | Capacitor; (1200-Volt) | 3 |
| 24***68 | Capacitor; (500-Volt) | 6 |
| 25***96 | Module As; -Utility | 1 |
250-7959 Module Gp-Alarm
| 13***49 | Control Group-Alarm Module | 1 |
| 19***39 | Film-Control Panel | 1 |
| 24***68 | Switch-Push Button; (Alarm Test) | 1 |
200-6274 Module Gp-Converter -Rh
| 20***74 | Module Group-Converter; -Rh | 1 |
| 20***90 | Board As; (Skiip Interface) | 1 |
| 32***95 | Board-Electronic; (Right Skiip) | 1 |
200-6276 Module Gp-Converter -Lh
| 20***76 | Module Group-Converter; -Lh | 1 |
| 20***90 | Board As; (Skiip Interface) | 1 |
| 23***64 | Module-Converter; (Lh)(Left Skiip) | 1 |
203-2745 Module Gp-Maintenance Bypass
| 20***45 | Module Group-Maintenance Bypass | 1 |
| 24***07 | Handle | 3 |
| 25***18 | Panel Group-Electrical | 1 |
209-5506 Module Gp-Maintenance Bypass
| 20***06 | Module Group-Maintenance Bypass | 1 |
| 24***07 | Handle | 3 |
| 25***18 | Panel Group-Electrical | 1 |
203-5446 Module Gp-Static Bypass
| 18***21 | Board As-Circuit; -Static Switch Interface | 1 |
| 20***36 | Thyristor | 3 |
| 20***90 | Fuse; (600-Ampere) | 3 |
203-2747 Module Gp-Static Bypass
| 20***77 | Fuse; (200-Ampere) | 3 |
| 20***38 | Module-Thyristor | 1 |
| 20***69 | Contactor | 1 |
206-8860 Module-External Modem -Interface
| 20***88 | Board As-Circuit; -System Input/Output | 1 |
| 20***60 | Module-External Modem; -Interface | 1 |
| 24***09 | Transformer | 1 |
206-8857 Module-External Modem -Interface
| 20***57 | Module-External Modem; -Interface | 1 |
263-3458 Module-External Modem
| 24***09 | Transformer | 1 |
| 26***58 | Module-External Modem | 1 |
263-3457 Module-External Modem
| 24***09 | Transformer | 1 |
| 26***57 | Module-External Modem | 1 |
263-3455 Module-External Modem
| 24***09 | Transformer | 1 |
| 26***55 | Module-External Modem | 1 |
263-3721 Module-External Modem
| 24***09 | Transformer | 1 |
| 26***21 | Module-External Modem | 1 |
203-4295 Module-External Modem -Interface
| 20***95 | Module-External Modem; -Interface | 1 |
| 24***09 | Transformer | 1 |
206-8861 Module-External Modem
| 20***88 | Board As-Circuit; -System Input/Output | 1 |
| 20***27 | Cable As-Communication | 1 |
| 20***61 | Module-External Modem | 1 |
206-8858 Module-External Modem -Interface
| 20***58 | Module-External Modem; -Interface | 1 |
203-3974 Module-External Modem -Interface
| 20***74 | Module-External Modem; -Interface | 1 |
| 24***09 | Transformer | 1 |
206-8859 Module-External Modem -Interface
| 20***59 | Module-External Modem; -Interface | 1 |
203-4222 Module-External Modem -Interface
| 20***22 | Module-External Modem; -Interface | 1 |
| 24***09 | Transformer | 1 |
203-3975 Module-External Modem -Interface
| 20***75 | Module-External Modem; -Interface | 1 |
| 24***09 | Transformer | 1 |
203-4221 Module-External Modem -Interface
| 20***21 | Module-External Modem; -Interface | 1 |
263-3459 Module-Internal Modem
| 20***26 | Cable As-Communication | 1 |
| 24***09 | Transformer | 1 |
| 24***54 | Modem As | 1 |
263-3330 Module-Internal Modem
| 20***26 | Cable As-Communication | 1 |
| 24***09 | Transformer | 1 |
| 24***55 | Modem As | 1 |
206-8856 Module-Internal Modem
| 20***56 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***55 | Modem As | 1 |
206-8854 Module-Internal Modem
| 20***54 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***55 | Modem As | 1 |
203-4224 Module-Internal Modem
| 20***24 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***54 | Modem As | 1 |
263-3454 Module-Internal Modem
| 24***09 | Transformer | 1 |
| 24***54 | Modem As | 1 |
| 26***54 | Module-Internal Modem | 1 |
203-3973 Module-Internal Modem
| 20***73 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***54 | Modem As | 1 |
206-8852 Module-Internal Modem
| 20***52 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***54 | Modem As | 1 |
263-3453 Module-Internal Modem
| 24***09 | Transformer | 1 |
| 24***55 | Modem As | 1 |
| 26***53 | Module-Internal Modem | 1 |
203-3972 Module-Internal Modem
| 20***72 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***55 | Modem As | 1 |
206-8855 Module-Internal Modem
| 20***55 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***54 | Modem As | 1 |
203-4225 Module-Internal Modem
| 20***25 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***55 | Modem As | 1 |
236-4957 Panel Ar-Control
| 23***48 | Panel Group-Control; -Generator Start | 1 |
| 23***50 | Bracket | 2 |
| 23***57 | Panel Ar-Control; -Generator Start, Single | 1 |
236-4956 Panel Ar-Control
| 23***48 | Panel Group-Control; -Generator Start | 2 |
| 23***50 | Bracket | 4 |
| 23***56 | Panel Ar-Control | 1 |
236-4958 Panel Ar-Control
| 23***48 | Panel Group-Control; -Generator Start | 2 |
| 23***50 | Bracket | 4 |
| 23***58 | Panel Ar-Control; -Generator Start, Dual | 1 |
236-4955 Panel Ar-Control
| 23***48 | Panel Group-Control; -Generator Start | 1 |
| 23***50 | Bracket | 2 |
| 23***55 | Panel Ar-Control | 1 |
240-2510 Panel As-Electrical -Power Supply
| 20***77 | Fuse; (200-Ampere) | 1 |
| 20***69 | Contactor | 1 |
| 20***69 | Indicator; (Fuse) | 1 |
256-3008 Panel As-Electrical -Static Bypass
| 18***21 | Board As-Circuit; -Static Switch Interface | 1 |
| 20***90 | Fuse; (600-Ampere) | 3 |
| 20***69 | Indicator; (Fuse) | 3 |
252-4932 Panel As-Electrical -Lh
| 20***77 | Fuse; (200-Ampere) | 1 |
| 20***69 | Indicator; (Fuse) | 1 |
| 22***07 | Board As-Circuit; (Zig Zag Controller) | 1 |
230-7666 Panel Gp-Annunciator
| 23***66 | Panel Group-Annunciator | 1 |
| 25***59 | Module Group-Alarm | 1 |
203-4299 Panel Gp-Annunciator
| 20***59 | Cable As | 1 |
| 20***60 | Cable As | 1 |
| 20***99 | Panel Group-Annunciator | 1 |
233-7648 Panel Gp-Control
| 23***48 | Panel Group-Control; -Generator Start | 1 |
| 23***53 | Capacitor | 2 |
| 23***57 | Fuse; (0.25-Ampere) | 2 |
202-7511 Panel Gp-Electrical
| 18***09 | Resistor; (13-Watt) | 12 |
| 18***22 | Board As; (Dc Interface) | 1 |
| 20***28 | Capacitor | 12 |
250-5521 Panel Gp-Electrical
| 20***32 | Power Supply; (350-Watt) | 2 |
| 25***21 | Panel Group-Electrical | 1 |
| 25***07 | Capacitor | 2 |
258-9961 Panel Gp-Electrical
| 24***10 | Panel As-Electrical; -Power Supply | 1 |
| 25***22 | Transformer As | 1 |
| 25***61 | Panel Group-Electrical | 1 |
256-7282 Panel Gp-Electrical
| 25***82 | Panel Group-Electrical | 1 |
| 25***03 | Panel Group-Electrical; -Disconnect Switch | 1 |
| 25***05 | Handle As | 1 |
9e-5987 Panel Gp-Electrical
| 24***07 | Handle | 3 |
| 24***81 | Holder; (Fuse) | 4 |
| 25***58 | Switch As; (400-Ampere, 3-Phase, 4-Pole) | 3 |
203-5457 Panel Gp-Electrical
| 20***57 | Panel Group-Electrical | 1 |
| 25***32 | Panel As-Electrical; -Lh | 1 |
| 25***22 | Transformer As | 1 |
203-5455 Panel Gp-Electrical
| 20***55 | Panel Group-Electrical | 1 |
| 23***76 | Panel Group-Electrical | 1 |
251-9618 Panel Gp-Electrical
| 20***82 | Switch Group-Disconnect | 3 |
| 24***81 | Holder; (Fuse) | 3 |
| 25***57 | Shaft | 2 |
258-8803 Panel Gp-Electrical -Disconnect Switch
| 24***12 | Switch-Disconnect; (Maintenance Bypass) | 3 |
| 24***14 | Shaft | 1 |
| 24***15 | Shaft | 2 |
258-8802 Panel Gp-Electrical
| 25***02 | Panel Group-Electrical | 1 |
| 25***03 | Panel Group-Electrical; -Disconnect Switch | 1 |
| 25***06 | Handle As | 1 |
236-4176 Panel Gp-Electrical
| 23***32 | Relay; (1.8-Ampere, 3-Pole)(Overload) | 1 |
| 23***34 | Block-Terminal | 1 |
| 23***72 | Transformer; (10-Ampere) | 1 |
251-3584 Panel Gp-Electrical
| 23***32 | Relay; (1.8-Ampere, 3-Pole)(Overload) | 1 |
| 23***34 | Block-Terminal | 1 |
| 23***72 | Transformer; (10-Ampere) | 1 |
227-4833 Panel Gp-Electrical
| 22***33 | Panel Group-Electrical | 1 |
| 22***34 | Filter As-Electrical | 1 |
| 22***35 | Resistor | 2 |
259-3194 Panel Gp-Power Supply
| 18***50 | Fuse; (300-Ampere)(Utility) | 3 |
| 20***65 | Fuse; (4-Ampere) | 2 |
| 20***66 | Fuse; (7-Ampere) | 2 |
203-4373 Panel Gp-Power Supply
| 20***07 | Varistor As; (Surge Protector)(Ac) | 2 |
| 20***08 | Disconnect; (400-Ampere, 3-Pole) | 4 |
| 20***73 | Panel Group-Power Supply | 1 |
203-4375 Panel Gp-Power Supply
| 20***07 | Varistor As; (Surge Protector)(Ac) | 2 |
| 20***08 | Disconnect; (400-Ampere, 3-Pole) | 8 |
| 20***75 | Panel Group-Power Supply | 1 |
266-5937 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 2 |
| 20***67 | Fuse; (1-Ampere) | 3 |
| 20***69 | Circuit Breaker As; (1200-Ampere) | 1 |
203-4382 Panel Gp-Power Supply
| 18***55 | Fuse; (3-Ampere)(Output) | 3 |
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
203-4383 Panel Gp-Power Supply
| 18***55 | Fuse; (3-Ampere)(Output) | 3 |
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
250-3438 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 2 |
| 20***67 | Fuse; (1-Ampere) | 3 |
| 20***61 | Panel As; (Input/Output) | 1 |
230-7667 Panel Gp-Power Supply
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
| 19***89 | Contactor | 2 |
266-5936 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 2 |
| 20***67 | Fuse; (1-Ampere) | 3 |
| 20***69 | Circuit Breaker As; (1200-Ampere) | 1 |
248-5465 Panel Gp-Power Supply
| 20***65 | Fuse; (4-Ampere) | 2 |
| 20***66 | Fuse; (7-Ampere) | 2 |
| 20***76 | Module Group-Converter; -Lh | 3 |
202-7659 Panel Gp-Power Supply
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
| 19***97 | Fuse; (3-Ampere) | 4 |
248-5467 Panel Gp-Power Supply
| 24***23 | Transformer | 1 |
| 24***11 | Handle; (Door) | 1 |
| 24***24 | Ring | 1 |
203-3912 Panel Gp-Power Supply
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
| 19***89 | Contactor | 2 |
250-6034 Panel Gp-Power Supply
| 25***34 | Panel Group-Power Supply | 1 |
| 25***59 | Module Group-Alarm | 1 |
252-5011 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 2 |
| 20***67 | Fuse; (1-Ampere) | 3 |
| 20***69 | Circuit Breaker As; (1200-Ampere) | 2 |
203-4385 Panel Gp-Power Supply
| 18***55 | Fuse; (3-Ampere)(Output) | 3 |
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
251-0043 Panel Gp-Power Supply
| 20***65 | Fuse; (4-Ampere) | 2 |
| 20***66 | Fuse; (7-Ampere) | 2 |
| 20***74 | Module Group-Converter; -Rh | 3 |
202-7660 Panel Gp-Power Supply
| 20***40 | Door-Front | 1 |
| 20***48 | Panel-Access; (Top) | 1 |
| 20***80 | Panel As-Side | 1 |
251-2177 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 2 |
| 20***67 | Fuse; (1-Ampere) | 3 |
| 20***61 | Panel As; (Input/Output) | 1 |
250-3437 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 2 |
| 20***67 | Fuse; (1-Ampere) | 3 |
| 20***69 | Circuit Breaker As; (1200-Ampere) | 1 |
202-7658 Panel Gp-Power Supply
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
| 19***89 | Contactor | 2 |
248-5466 Panel Gp-Power Supply
| 20***48 | Panel-Access; (Top) | 1 |
| 24***11 | Capacitor; (Oil-Filled) | 1 |
| 24***11 | Handle; (Door) | 1 |
255-0609 Panel Gp-Power Supply
| 25***09 | Panel Group-Power Supply | 1 |
| 25***65 | Panel Group-Power Supply | 1 |
| 25***94 | Panel Group-Power Supply | 1 |
203-4374 Panel Gp-Power Supply
| 20***07 | Varistor As; (Surge Protector)(Ac) | 2 |
| 20***08 | Disconnect; (400-Ampere, 3-Pole) | 6 |
| 20***74 | Panel Group-Power Supply | 1 |
251-2175 Panel Gp-Power Supply
| 20***65 | Fuse; (4-Ampere) | 2 |
| 20***66 | Fuse; (7-Ampere) | 2 |
| 20***52 | . Coller, Sensor-Vacuum; (Flywheel Bearing) | 1 |
252-0570 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 4 |
| 20***63 | Fuse; (1.5-Ampere) | 2 |
| 20***49 | Power Supply; (150-Watt) | 2 |
258-9866 Panel Gp-Power Supply
| 24***11 | Capacitor; (Oil-Filled) | 1 |
| 24***23 | Transformer | 1 |
| 24***24 | Contactor | 1 |
203-4384 Panel Gp-Power Supply
| 18***55 | Fuse; (3-Ampere)(Output) | 3 |
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
255-0608 Panel Gp-Power Supply
| 25***08 | Panel Group-Power Supply | 1 |
| 25***66 | Panel Group-Power Supply | 1 |
| 25***94 | Panel Group-Power Supply | 1 |
319-4158 Panel Gp-Power Supply
| 18***46 | Kit-Pump; (Vacuum) | 1 |
| 19***06 | Fan As-Circulating | 6 |
| 20***65 | Fuse; (4-Ampere) | 2 |
250-3439 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 2 |
| 20***67 | Fuse; (1-Ampere) | 3 |
| 20***69 | Circuit Breaker As; (1200-Ampere) | 2 |
237-0175 Panel Gp-Power Supply
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
| 19***97 | Fuse; (3-Ampere) | 2 |
258-9865 Panel Gp-Power Supply
| 20***48 | Panel-Access; (Top) | 1 |
| 24***11 | Capacitor; (Oil-Filled) | 1 |
| 24***24 | Contactor | 1 |
202-7646 Power Gp-Uninterruptible
| 20***59 | Film Group | 1 |
| 20***46 | Power Group-Uninterruptible | 1 |
| 20***58 | Panel Group-Power Supply | 1 |
202-7645 Power Gp-Uninterruptible
| 20***45 | Power Group-Uninterruptible | 1 |
| 20***58 | Panel Group-Circuit Breaker | 1 |
| 22***83 | Conduit Group | 1 |
202-7643 Power Gp-Uninterruptible
| 20***43 | . Gear; Internal, Power Group-Uninterruptible | 1 |
| 20***60 | Panel Group-Power Supply | 1 |
| 20***12 | Panel Group-Power Supply | 1 |
202-7648 Power Gp-Uninterruptible
| 20***58 | Film Group | 1 |
| 20***48 | Power Group-Uninterruptible | 1 |
| 20***58 | Panel Group-Power Supply | 2 |
202-7649 Power Gp-Uninterruptible
| 20***57 | Film Group | 1 |
| 20***49 | Power Group-Uninterruptible | 1 |
| 20***58 | Panel Group-Power Supply | 3 |
202-7650 Power Gp-Uninterruptible
| 20***57 | Film Group | 1 |
| 20***50 | Power Group-Uninterruptible | 1 |
| 20***58 | Panel Group-Power Supply | 3 |
202-7647 Power Gp-Uninterruptible
| 20***47 | Power Group-Uninterruptible, .. Axle | 1 |
| 20***58 | Panel Group-Circuit Breaker | 1 |
| 22***83 | Conduit Group | 1 |
204-0304 Power Gp-Uninterruptible
| 18***64 | Filter Element As-Encl Air | 1 |
| 18***65 | Filter Element As-Encl Air | 1 |
| 19***89 | Contactor | 2 |
202-7644 Power Gp-Uninterruptible
| 20***44 | Power Group-Uninterruptible | 1 |
| 20***60 | Panel Group-Power Supply | 1 |
| 20***12 | Panel Group-Power Supply | 1 |
234-7687 Power Supply Gp
| 20***32 | Power Supply; (350-Watt) | 1 |
| 23***87 | Power Supply Group | 1 |
| 23***88 | Capacitor; (450-Volt) | 2 |
231-3504 Pump & Motor Gp-Vacuum
| 18***46 | Kit-Pump; (Vacuum) | 1 |
| 23***04 | Pump & Motor Group-Vacuum | 1 |
| 24***65 | Ring | 4 |
Service Equipment And Supplies
200-1859 Film Gp
| 13***39 | Film-Stripe; (Red)(625cm) | 0 |
| 20***44 | Film; (Electric Power) | 1 |
| 20***59 | Film Group | 1 |
200-1857 Film Gp
| 13***39 | Film-Stripe; (Red)(625cm) | 0 |
| 20***44 | Film; (Electric Power) | 1 |
| 20***57 | Film Group | 1 |
200-1845 Film Gp
| 12***94 | Film-Stripe; (Black)(56cm) | 0 |
| 20***24 | Film; (Electric Power) | 1 |
| 20***25 | Film-Stripe; (Red)(44cm) | 0 |
200-1858 Film Gp
| 13***39 | Film-Stripe; (Red)(625cm) | 0 |
| 20***44 | Film; (Electric Power) | 1 |
| 20***58 | Film Group | 1 |
200-1856 Film Gp
| 13***39 | Film-Stripe; (Red)(625cm) | 0 |
| 20***44 | Film; (Electric Power) | 1 |
| 20***56 | Film Group | 1 |
203-4716 Film Gp
| 20***16 | Film Group | 1 |
| 22***51 | Film; (Cat) | 1 |
| 22***52 | Film; (Electric Power) | 1 |
245-0559 Kit-Sensor & Mounting
| 24***59 | Kit-Sensor & Mounting | 1 |
203-5447 Parts Gp-Miscellaneous
| 18***22 | Board As; (Dc Interface) | 1 |
| 18***49 | Fuse; (250-Ampere)(Flywheel) | 3 |
| 18***54 | Fuse; (20-Ampere)(Output) | 5 |
230-4161 Parts Gp-Miscellaneous
| 18***54 | Fuse; (20-Ampere)(Output) | 5 |
| 18***55 | Fuse; (3-Ampere)(Output) | 5 |
| 18***60 | Fuse; (2-Ampere) | 10 |
261-8122 Parts Gp-Miscellaneous
| 18***21 | Board As-Circuit; -Static Switch Interface | 1 |
| 18***50 | Fuse; (300-Ampere)(Utility) | 3 |
| 18***54 | Fuse; (20-Ampere)(Output) | 2 |
230-4162 Parts Gp-Miscellaneous
| 18***55 | Fuse; (3-Ampere)(Output) | 10 |
| 18***60 | Fuse; (2-Ampere) | 10 |
| 18***61 | Fuse; (5-Ampere) | 10 |
250-6033 Parts Gp-Miscellaneous
| 18***54 | Fuse; (20-Ampere)(Output) | 5 |
| 18***55 | Fuse; (3-Ampere)(Output) | 5 |
| 18***60 | Fuse; (2-Ampere) | 10 |
203-5448 Parts Gp-Miscellaneous
| 18***55 | Fuse; (3-Ampere)(Output) | 10 |
| 18***60 | Fuse; (2-Ampere) | 10 |
| 18***61 | Fuse; (5-Ampere) | 10 |
250-6032 Parts Gp-Miscellaneous
| 18***55 | Fuse; (3-Ampere)(Output) | 10 |
| 18***60 | Fuse; (2-Ampere) | 10 |
| 19***04 | Fuse; (3-Ampere) | 10 |
UPS 750 serial number reference
On a Cat flywheel UPS the rating/PIN plate sits on the exterior of the power-supply enclosure (front or side access panel, near the main breaker or control touchscreen), not on an engine block, since the module has no internal combustion engine. The first three characters of the serial number are the prefix identifying model and build series; the digits after it are the sequential unit number, e.g. CD700001.
| Prefix | Identifies | Notes |
|---|---|---|
| CD7 | UPS 750 single-module flywheel UPS - dedicated serial prefix | Tied to the UPS 750 flywheel UPS on a dedicated parts/service manual title, separate from the shared UPS250-UPS900 multi-module electrical schematic listing that also references the UPS 750 by name. Not documented in any general Caterpillar serial-prefix reference - confirm with dealer before ordering against it. |
Frequently asked questions
What engine does the Cat UPS 750 use?
None. The UPS 750 is a battery-free, flywheel-based static UPS module, not an engine-driven generator set, despite sometimes being grouped under that category. It bridges the load electrically through a spinning flywheel and an IGBT-based bi-directional converter for roughly fifteen seconds to about a minute depending on load, long enough for a separate standby diesel generator to start and pick up the load.
What is the operating weight of the UPS 750?
A single UPS 750 power module weighs approximately 4242 kg (9350 lb). That figure is for one Single Module System (SMS) cabinet; total installed weight scales up accordingly when modules are paralleled into a Multi-Module System (MMS) for added capacity or redundancy.
What replaced the UPS 750?
Nothing has formally superseded it: the UPS 750 remains part of Caterpillar's current flywheel UPS lineup. Caterpillar has since added higher-capacity Z-Series flywheel modules for larger, factory-paralleled installations, giving customers a scale-up path above 750 kVA without discontinuing the 750 itself.
What UPS 750 owners discuss
Is the UPS 750 actually an engine or a generator set?
No. Despite the catalog label, the UPS 750 is a flywheel-based static UPS module, not an engine and not a genset. It stores energy mechanically in a spinning rotor housed in a vacuum enclosure, then discharges it through an IGBT converter to ride through a utility dip until a separate standby generator picks up the load. Rating is 750 kVA (675 kW) at 480 V, 60 Hz, three phase, roughly 0.9 power factor. Techs who service these units are quick to point out the UPS 750 itself has no combustion engine at all - the diesel genset it's paired with in a system is a separate machine entirely, and specs should never be crossed between the two.
What is the real-world service life of the flywheel bearings, and when do they need attention?
Bearing life is the main wear item on this design and the interval varies by generation. Older mechanical/ceramic bearing sets in similar-class flywheel UPS platforms are commonly replaced on a roughly 3 to 8 year cycle, with newer magnetic or hybrid bearing designs trending toward the longer end of that range. The rotor spins continuously in a vacuum, so bearing condition is normally tracked with vibration trend monitoring rather than waiting for a fault - a shift in vibration signature is the standard early warning sign of bearing wear before it becomes a shutdown event. Bearing replacement work involves rotating machinery under vacuum - have your dealer verify the correct interval and procedure for your specific serial/build.
How long does the vacuum pump on the flywheel module typically last, and what fails?
The external vacuum pump that maintains the rotor's low-friction environment is treated as a routine wear component, not a lifetime part. Field experience across this class of flywheel UPS puts typical pump life around 8 to 10 years before replacement is needed. Loss of vacuum shows up as increased windage drag on the flywheel, reduced discharge time, and higher running temperature - facilities staff are advised to log pump run hours and vacuum level rather than just calendar age, since duty cycle and ambient conditions affect wear more than age alone.
How reliable is the static bypass switch, and what do techs watch for?
Consensus among facilities engineers is that a properly designed, fully-rated static bypass switch (SCRs on heat sinks with active cooling) is very reliable, with field failure rates in the low single digits per million hours of operation. The known weak points are the cooling fans on the switch heat sinks and, on older or partially-rated designs, the transfer contactors - a shorted contactor failure is the one that actually drops the load, so it gets more attention during PM than the SCRs themselves. Redundant cooling fans are the standard mitigation. Because a bypass switch failure can de-energize a live critical load, have your dealer verify switch test results and fan condition during scheduled maintenance.
What causes cooling fan and IGBT converter problems on these units?
The bi-directional IGBT converter is the component that does the real work of turning flywheel kinetic energy into clean output power, and it runs hot under load. Redundant cooling fans are built in for this reason, and the recurring theme from people who maintain these systems is that fan failure or a clogged filter is what actually threatens the converter - the IGBT architecture itself is described as fault-tolerant, but only if airflow and ambient temperature stay within spec. Regular filter cleaning and fan function checks are treated as more important than any single electronic component swap. Any converter fault-code investigation involving live power electronics should be handed to your dealer.
Is the battery-free flywheel design actually better than a VRLA battery UPS?
Operators who have run both are generally positive about the flywheel trade, but with one caveat everyone repeats: ride-through time is short, typically in the range of 15 to 40 seconds at full load depending on configuration and loading, versus many minutes for a battery string. That's fine as long as the standby generator starts reliably on the first attempt - if it doesn't, the flywheel discharges before the generator picks up and the load is exposed. The upside cited most often is avoiding the recurring VRLA replacement cycle (batteries typically swapped multiple times over a 20 year facility life) and skipping the routine monthly/quarterly battery inspections that come with lead-acid strings. Sites that have had repeated battery failures despite good PM tend to be the ones that switch to flywheel and report high satisfaction afterward.
What should I check before buying or taking over a used UPS 750 installation?
Ask for the maintenance log first - bearing and vacuum pump service history tells you more than the unit's age. Confirm actual run hours and how many discharge cycles the flywheel has seen, not just calendar time. Check the self-diagnostic and alarm history on the touchscreen/monitoring interface for recurring converter, cooling-fan, or bypass-switch faults. Verify the static bypass switch has a current test record, since that is the safety-critical path if the converter ever faults. Confirm what standby generator the UPS 750 is actually paired with in the installation and get its maintenance records too, since a poorly maintained generator undermines the whole short-ride-through strategy. Physically inspect for unusual noise or vibration during a run demonstration, and check the vacuum enclosure and pump for any sign of degraded vacuum. Have your dealer run a full diagnostic and bypass-switch test before you rely on the unit for critical load.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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