Caterpillarengine - generator setuninterruptible pwr su
Caterpillar UPS 301
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar UPS 301 is a stationary, battery-free flywheel uninterruptible power supply module, part of Cat's UPS-Flywheel family alongside the UPS120, 150, 250, 300, 500, 600, 750, and 900 frames. It has no internal combustion engine, no undercarriage, and no fuel, coolant, or hydraulic system; a spinning rotor stores kinetic energy, and an IGBT-based bi-directional converter uses that stored energy to bridge the critical load the instant utility power drops, holding it until a separately supplied standby diesel generator set starts and takes over. It sits in Cat's Z-Series flywheel line and is cataloged under its own dedicated serial prefix, CSY, separate from the UPS 300 catalog listing. Standalone operation is the default configuration; the module can also be paralleled with other Z-Series frames for N+1 redundancy or added capacity, and can be ordered with an optional GenStart module for diesel-genset cranking assist, remote monitoring adapters, and EPO switching. No published source ties a standalone kVA/kW rating, operating weight, or enclosure footprint specifically to model 301 - read those figures off the unit's own rating plate or confirm with a Cat dealer rather than assume they match a similarly numbered sibling.
Unlike a mobile machine line, the flywheel-UPS family does not run through model-year generations; each capacity frame, including the 301, is its own catalog entry with its own dedicated serial break rather than a lettered or numbered successor to the frame before it. What changed across the line as a whole was the shift away from older battery-backed (VRLA) UPS designs toward a sealed mechanical flywheel and IGBT converter, cutting periodic battery testing and replacement down to a bearing and vacuum-housing service cycle measured in years rather than months. In the used and critical-power equipment market, this module holds value in data-center, hospital, and industrial ride-through applications paired with a standby generator, where buyers weigh bypass and alarm history, firmware support status, and dealer-verified bearing and vacuum condition well ahead of any parts-availability concern, since there is no engine parts catalog driving its resale.
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 301 specifications
Engine
| Power module type | Battery-free flywheel energy-storage module with an IGBT-based bi-directional converter. No internal combustion engine and no battery bank; the module bridges the load electrically on stored rotational (kinetic) energy until utility power recovers or a separately supplied Cat diesel generator set assumes the load. |
| Generator set integration | An optional generator-set-start (GenStart) module lets the unit crank a standby diesel genset the instant utility power is lost, supplying on the order of 1,725 cold-cranking amps at 24 VDC through an integrated battery charger; single- and dual-circuit-breaker versions are offered for redundant starter circuits. This is documented at the Cat flywheel-UPS product-line level, not on a dedicated UPS 301 cut sheet, but the parts-catalog assemblyIndex for this exact model confirms the option is fitted to this frame. |
| Emissions tier | Not applicable — stationary power-conditioning equipment, no combustion engine of its own. |
Weights
| Operating/shipping weight | Not documented for this specific frame. Caterpillar's flywheel UPS line assigns each capacity a dedicated model/serial-prefix (this unit's own catalog is filed separately from the UPS 300 catalog under its own serial break), so the published weight for the sibling UPS 300 frame (about 3,063 kg / 6,750 lb) cannot be assumed to equal this unit's weight. Confirm on the unit's own rating plate or with a Cat dealer. |
| Ground pressure | Not applicable — floor-mounted stationary electrical equipment, not a mobile machine. |
Dimensions
| Enclosure dimensions | Not documented for this specific frame in accessible factory literature. The unit ships in a floor-standing cabinet enclosure consistent with the rest of the flywheel-UPS line (input/output section, control section, and module section), but a model-specific length/width/height cut sheet was not located — verify with a Cat dealer or the unit's own installation drawing. |
| Cable entry | Top and bottom conduit entry panels on the enclosure, consistent with the rest of the flywheel-UPS enclosure family. |
Performance
| Rated capacity (kVA/kW) | Not confirmed for this exact model number. This unit shares one combined parts/schematic manual with several other flywheel-UPS capacity frames in the same family, each carrying its own model number and serial prefix; no accessible source publishes a standalone numeric kVA/kW rating tied specifically to this model designation. Read the rating directly off the unit's own rating plate or confirm with a Cat dealer rather than assuming it matches a similarly numbered sibling. |
| System efficiency | Cat's flywheel UPS product line as a whole is marketed at greater than 97% total system efficiency; this figure is published at the family level and was not found broken out for this specific frame. |
| Power bridging / ride-through function | Stores kinetic energy in a rotating flywheel to bridge (ride through) short utility outages, sags, and surges without a battery bank, then transfers to a static bypass onto raw utility power or hands off to a standby generator set if the outage continues. Exact ride-through time in seconds is published at the product-line level for other named frames in the family and was not found tied specifically to this model. |
| Static/maintenance bypass switching | Thyristor-based static bypass switch transfers the critical load onto utility power the instant the module goes out of tolerance; a separate hand-operated maintenance bypass routes power fully around the electronics for planned service. |
Service capacities (summary)
| Engine oil, fuel, coolant | Not applicable. The unit carries no engine, so there is no crankcase, fuel tank, or engine cooling system to service. |
| Hydraulic system | Not applicable — no hydraulic circuit is part of this module. |
| Flywheel bearing / rotor lubrication | Not documented for this model in publicly available literature. Flywheel UPS modules of this class typically use sealed, low-friction bearing designs needing little routine lubrication compared with an engine; confirm the exact requirement against the unit's own Operation and Maintenance Manual or with a Cat dealer. |
| Cabinet/electronics cooling | Forced-air cabinet cooling with intake/cabinet air filters as the routine cooling-related service item; no liquid coolant circuit is fitted. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
UPS 301 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not applicable | The Cat UPS 301 belongs to the Cat UPS-Flywheel family (UPS120/150/250/300/301/500/600/750/900), a flywheel-based uninterruptible power supply module. It stores rotational kinetic energy and bridges the load electrically for a short ride-through window until a separately supplied Cat diesel generator set walks in and assumes the load. It carries no engine crankcase of its own — it is not a diesel engine driving its own generator end. No engine oil refill capacity applies to this unit. |
| Cooling system | Not applicable | No liquid-cooled engine block exists on the UPS 301 module. Cabinet/electronics cooling on flywheel UPS units of this class is typically forced-air, with intake/cabinet air filters as the routine cooling-related service item. No coolant/antifreeze refill capacity or mix ratio is documented for this unit. |
| Fuel tank | Not applicable | The UPS 301 has no onboard fuel tank or fuel system. Fuel storage and fuel specification belong to the separate diesel generator set the UPS unit is paired with, not to the UPS module itself. |
| Flywheel bearing / rotor lubrication | Not documented for this model in publicly available literature | Flywheel UPS modules in this class generally use sealed, low-friction bearing designs (mechanical anti-friction bearings, sometimes housed under partial vacuum to cut windage loss) that need little to no routine lubrication compared with a conventional engine. Where a vacuum-housed design is used, service is normally limited to periodic vacuum-level and sight-gauge oil checks rather than a scheduled oil-and-filter change. Caterpillar has not published a specific bearing oil or grease brand/viscosity spec for the UPS 301 in generally available documentation — confirm the exact lubrication requirement and interval against the unit's own Operation and Maintenance Manual or with a Cat dealer. |
| Hydraulic system and tank | Not applicable | No hydraulic circuit is part of the UPS 301 module; it has no hydraulic tank, pump, or cylinder functions to service. |
| Transmission / powertrain compartments | Not applicable | The UPS 301 has no transmission, torque converter, or drivetrain compartment; it is a stationary electromechanical energy-storage unit, not a driven machine. |
| Final drives / axles | Not applicable | Not applicable — the UPS 301 is a stationary panel/flywheel assembly with no final drives or axles. |
| Grease (general chassis/service points) | Spec only — quantity not documented | General Cat multipurpose grease practice applies to any exposed mechanical service points (access doors, latches, hinges) on the enclosure, but no model-specific grease chart for the UPS 301 internals was located. Verify any internal lubrication points and grease spec with the unit's own O&M manual or a Cat dealer before servicing. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar UPS 301 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 50,000 h |
|
| Every 75,000 h |
|
Servicing the UPS 301 beyond the schedule
Predictive Maintenance & Fluid Analysis
No fluid analysis applies to the UPS 301 - there is no engine oil, coolant, or hydraulic fluid to sample. Predictive maintenance means condition monitoring instead: tracking HMI and remote-monitoring alarm trends, watching DC bus and flywheel-speed readings for drift, and logging bearing noise or vibration at the sealed rotor housing over time. Vacuum-housed rotors add vacuum-pump oil level and sight-gauge trending to that list. A slow shift in any of these readings is the earliest warning of bearing or converter wear, well before a bypass event forces the issue.
Corrective & Common Repairs
Field repairs on the UPS 301 center on power electronics, not a driveline. Common corrective work includes clearing static bypass switch transfer faults, resetting DC bus over/under-voltage or converter IGBT trips, restoring a dropped SNMP/Modbus or Ethernet monitoring link, and swapping cooling fans flagged by the HMI. If a GenStart module is fitted, starter-circuit and battery-charger faults are also routed through this path. Any repair inside the sealed flywheel or converter cabinet must go through the hand-operated maintenance bypass first so the protected load stays covered.
Overhaul & Rebuild Points
There is no engine or undercarriage to overhaul on the UPS 301; the equivalent wear points are the flywheel rotor bearings and, where fitted, the vacuum-housing pump. Mechanical bearing designs typically reach a service or replacement window around 5 to 8 years of continuous energization; the vacuum pump, where used, follows around 8 to 10 years. Both jobs require the maintenance bypass to carry the load while the module is offline, and both should close with a spin-up, static-bypass, and converter function test before the unit returns to service.
Seasonal & Environmental Servicing
The UPS 301 is built for an indoor, climate-controlled space, not outdoor duty. Seasonal servicing means confirming the room stays within the platform's documented temperature range, checking enclosure doors, latches, and top/bottom conduit entries for humidity or dust ingress, and keeping the cabinet's forced-air intake filters and cooling fans clear year-round. There is no cold-weather fuel or coolant prep and no seasonal fluid change, since neither system exists on this module - a blocked filter is the most common driver of a nuisance over-temperature alarm.
UPS 301 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 301 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| DC Bus Voltage Fault (over/under) | DC bus deviates from its normal operating band (roughly 650V during start-up ramp, roughly 800V in normal run) beyond a programmed threshold. | ||
| Flywheel Overspeed | Flywheel rotor speed exceeds its rated full-charge band (nominal full charge is documented around 7,700 rpm for this product family). | ||
| Flywheel Underspeed / Low Charge | Rotor speed has fallen below the level needed to guarantee rated ride-through time. | ||
| Static Switch / Static Bypass Transfer Fault | The thyristor (SCR) static disconnect/bypass switch fails to commutate cleanly during an online-to-bypass or bypass-to-online transfer. | ||
| Utility Converter / Flywheel Converter (IGBT) Fault | A fault is flagged in one of the two IGBT power-conversion stages that move power between utility, DC bus, and flywheel. | ||
| Vacuum System Alarm | Vacuum level in the flywheel rotor enclosure has dropped outside its normal range. | ||
| Bearing / Magnetic Lift Fault | The magnetic lift circuit that unloads the flywheel's mechanical backup bearings at speed is not exciting correctly, or backup bearing wear/vibration has been flagged. | ||
| Control Power / Redundant Supply Fault | One of the redundant low-voltage supplies feeding the control/logic card has dropped out. | ||
| Cooling Fan Fault | One of the cabinet's redundant cooling fans is not running at commanded speed. | ||
| Communication / Remote Monitoring Fault | Loss of the Ethernet, Modbus/SNMP, or internal modem link between the control card, the HMI, and remote monitoring software. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
UPS 301 attachments & work tools
Machine type note
The UPS 301 is a stationary, battery-free flywheel-based uninterruptible power supply frame, not a mobile machine or engine-generator set. It belongs to the same UPS-Flywheel product family as the UPS120/150/250/300/500/600/750/900 frames, which share one electrical-panel parts-catalog structure. There are no mechanical work tools or couplers for this class - the categories below cover factory/field-installable electrical option modules.
Static and maintenance bypass switching
A thyristor-based static bypass switch transfers the critical load onto raw utility power the instant the module goes out of tolerance, so the flywheel and a downstream generator can pick up without dropping the load. An internal maintenance-bypass section with hand-operated bypass handles lets technicians route power completely around the electronics for planned service.
Z-Series multi-module paralleling
This frame size sits in Cat's Z-Series flywheel line, which can only be paralleled with other Z-Series modules using dedicated paralleling hardware, combining multiple modules for N+1 redundancy or added capacity. A single module of this size normally ships and runs standalone; multi-module scaling is an added-cost configuration, not a default, and the exact paralleling count for this specific frame is not separately published - confirm with dealer configuration guides.
Generator-set start (GenStart) module
An optional generator-start module lets the UPS crank a standby diesel genset the instant utility power is lost, supplying on the order of 1725 cold-cranking amps at 24 VDC through an integrated battery charger, so the flywheel only has to ride through until the engine assumes load. Single- and dual-circuit-breaker versions are offered, the dual version wired for two separate genset starter circuits for redundancy.
Remote monitoring and communications
Communication adapter kits add Ethernet, Modbus, and SNMP connectivity plus a color touchscreen operator interface, remote status annunciation, and e-mail alarm notification back to a monitoring platform. Protocol-conversion modules let the panel speak building-management or SCADA protocols alongside its native interface.
Emergency Power Off (EPO) and safety switching
Local Emergency Power Off pushbutton kits are fitted at the cabinet face, and a remote switch group with its own pushbutton station is offered for wiring to a remote location such as a data-hall entrance. A separate emergency-module-off switch can de-energize one module without tripping the whole system.
Isolation and distribution transformers
Optional isolation/output transformers re-reference the UPS output neutral to ground, used where downstream four-pole transfer switching sits between the utility feed and a standby generator. Transformer assemblies are ordered to match a site's grounding scheme rather than fitted by default.
Enclosure, disconnect, and cooling configuration
The cabinet uses a forced-air circulating fan with a screened intake, removable kickplates, and conduit groups sized to the installation's cable entry. Incoming/outgoing 3-pole disconnect switch groups are offered in different pole counts, roughly four to eight individual disconnects, depending on how many power paths the installation needs.
All UPS 301 assemblies by section
Every catalogued assembly group for the Caterpillar UPS 301. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Electrical And Starting System
255-6649 Adapter Gp-Communication -Ethernet Hub
| 22***05 | Adapter Group-Communication; -Ethernet Hub | 1 |
| 25***49 | Adapter Group-Communication; -Ethernet Hub | 1 |
248-8796 Adapter Gp-Communication -Ethernet
| 24***96 | Adapter Group-Communication; -Ethernet | 1 |
255-6648 Adapter Gp-Communication -Ethernet Hub
| 22***95 | Adapter Group-Communication; -Ethernet Hub | 1 |
| 25***48 | Adapter Group-Communication; -Ethernet Hub | 1 |
228-4094 Adapter Gp-Communication -Ethernet
| 22***94 | Adapter Group-Communication; -Ethernet | 1 |
| 22***05 | Adapter Group-Communication; -Ethernet Hub | 1 |
228-4095 Adapter Gp-Communication -Ethernet Hub
| 22***95 | Adapter Group-Communication; -Ethernet Hub | 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 |
206-8863 Adapter Gp-Communication
| 20***63 | Adapter Group-Communication | 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 |
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 |
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 |
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 |
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 |
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 |
259-3201 Board As-Circuit -Interface
| 24***46 | Fuse; (3.15-Ampere) | 1 |
| 25***01 | Board As-Circuit; -Interface | 1 |
259-3199 Board As-Circuit -Emi Filter
| 24***51 | Capacitor | 6 |
| 25***99 | Board As-Circuit; -Emi Filter | 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 |
180-6221 Board As-Circuit -Static Switch Interface
| 18***21 | Board As-Circuit; -Static Switch Interface | 1 |
| 29***60 | Cable As | 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 |
242-7424 Board As-Circuit
| 24***24 | Board As-Circuit | 1 |
242-9378 Board As-Circuit -Fan Monitor
| 24***46 | Fuse; (3.15-Ampere) | 6 |
| 24***78 | Board As-Circuit; -Fan Monitor | 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 |
243-2250 Board As-Circuit -Controller
| 23***29 | Battery; (Lithium) | 1 |
| 24***50 | Board As-Circuit; -Controller | 1 |
201-2605 Board As-Circuit -Fan Monitor
| 20***05 | Board As-Circuit; -Fan Monitor | 1 |
| 24***46 | Fuse; (3.15-Ampere) | 6 |
243-2251 Board As-Circuit -Controller
| 20***71 | Diskette | 1 |
| 20***76 | Diskette | 1 |
| 23***29 | Battery; (Lithium) | 1 |
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 |
201-2188 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 |
235-6333 Board As-Circuit -Electro Magnetic Interference
| 23***51 | Capacitor | 3 |
| 23***33 | Board As-Circuit; -Electro Magnetic Interference | 1 |
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 |
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 |
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 |
249-5619 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 |
249-5621 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 |
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 |
249-5620 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 |
207-8641 Conduit Gp
| 20***41 | Conduit Group | 1 |
| 22***88 | Conduit Group; (Fourth Enclosure) | 1 |
207-4320 Conduit Gp
| 20***20 | Conduit Group | 1 |
| 22***86 | Conduit Group | 1 |
207-4315 Conduit Gp
| 20***15 | Conduit Group | 1 |
| 22***83 | Conduit Group | 1 |
203-4683 Conduit Gp
| 20***83 | Conduit Group, .. Cyl. | 1 |
226-4887 Conduit Gp
| 22***87 | Conduit Group | 1 |
| 27***83 | Cable; (24-Ga) | 2 |
| 27***84 | Cable; (24-Ga) | 1 |
226-4883 Conduit Gp
| 22***83 | Conduit Group | 1 |
| 27***83 | Cable; (24-Ga) | 2 |
207-4323 Conduit Gp
| 20***23 | Conduit Group | 1 |
| 22***87 | Conduit Group | 1 |
226-4886 Conduit Gp
| 22***86 | Conduit Group | 1 |
| 27***83 | Cable; (24-Ga) | 2 |
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 |
229-2889 Conversion Gp-Communication -Protocol Functionality
| 22***89 | Conversion Group-Communication; -Protocol Functionality | 1 |
226-5484 Conversion Gp-Communication
| 22***84 | Conversion Group-Communication | 1 |
228-4114 Conversion Gp-Communication
| 22***14 | Conversion Group-Communication | 1 |
228-4112 Conversion Gp-Communication
| 22***12 | Conversion Group-Communication | 1 |
229-2890 Conversion Gp-Communication -Modbus Functionality
| 22***90 | Conversion Group-Communication; -Modbus Functionality | 1 |
203-3976 Diskette
| 20***76 | Diskette | 1 |
203-3971 Diskette
| 20***71 | 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 |
293-5402 Kit-Switch -Emergency Power Off
| 28***13 | Switch As-Push Button; (Emergency Power Off) | 1 |
| 29***02 | Kit-Switch; -Emergency Power Off | 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 |
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 |
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 |
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 |
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 |
203-4323 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 |
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 |
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 |
258-8805 Handle As
| 24***13 | Handle; (Maintenance Bypass) | 3 |
| 25***05 | Handle As | 1 |
258-8806 Handle As
| 24***13 | Handle; (Maintenance Bypass) | 3 |
| 25***06 | Handle As | 1 |
203-4320 Kickplate
| 20***20 | Kickplate | 1 |
203-4322 Kickplate
| 20***22 | Kickplate | 1 |
203-4321 Kickplate
| 20***21 | Kickplate | 1 |
203-4319 Kickplate
| 20***19 | Kickplate | 1 |
203-4318 Kickplate
| 20***18 | Kickplate | 1 |
206-8862 Kickplate
| 20***62 | 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 |
259-3197 Filter As-Electrical -Ac
| 24***42 | Capacitor; (600-Volt) | 6 |
| 25***97 | Filter As-Electrical; -Ac | 1 |
| 25***98 | Cable | 2 |
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 |
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 |
227-4834 Filter As-Electrical
| 20***28 | Capacitor | 12 |
| 22***34 | Filter As-Electrical | 1 |
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 |
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 |
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 |
250-5510 Module As -Field Coil Driver
| 25***10 | Module As; -Field Coil Driver | 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 |
259-3196 Module As -Utility
| 24***67 | Capacitor; (1200-Volt) | 3 |
| 24***68 | Capacitor; (500-Volt) | 6 |
| 25***96 | Module As; -Utility | 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 |
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 |
209-5506 Module Gp-Maintenance Bypass
| 20***06 | Module Group-Maintenance Bypass | 1 |
| 24***07 | Handle | 3 |
| 25***18 | Panel Group-Electrical | 1 |
203-2745 Module Gp-Maintenance Bypass
| 20***45 | 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 |
206-8859 Module-External Modem -Interface
| 20***59 | Module-External Modem; -Interface | 1 |
263-3721 Module-External Modem
| 24***09 | Transformer | 1 |
| 26***21 | Module-External Modem | 1 |
203-3975 Module-External Modem -Interface
| 20***75 | Module-External Modem; -Interface | 1 |
| 24***09 | Transformer | 1 |
203-4222 Module-External Modem -Interface
| 20***22 | Module-External Modem; -Interface | 1 |
| 24***09 | Transformer | 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 |
203-3974 Module-External Modem -Interface
| 20***74 | Module-External Modem; -Interface | 1 |
| 24***09 | Transformer | 1 |
203-4221 Module-External Modem -Interface
| 20***21 | Module-External Modem; -Interface | 1 |
263-3457 Module-External Modem
| 24***09 | Transformer | 1 |
| 26***57 | 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 |
263-3455 Module-External Modem
| 24***09 | Transformer | 1 |
| 26***55 | Module-External Modem | 1 |
203-4224 Module-Internal Modem
| 20***24 | 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 |
263-3453 Module-Internal Modem
| 24***09 | Transformer | 1 |
| 24***55 | Modem As | 1 |
| 26***53 | Module-Internal Modem | 1 |
263-3459 Module-Internal Modem
| 20***26 | Cable As-Communication | 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 |
206-8856 Module-Internal Modem
| 20***56 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***55 | Modem As | 1 |
203-3973 Module-Internal Modem
| 20***73 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***54 | Modem As | 1 |
206-8855 Module-Internal Modem
| 20***55 | 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 |
203-3972 Module-Internal Modem
| 20***72 | Module-Internal Modem | 1 |
| 24***09 | Transformer | 1 |
| 24***55 | Modem As | 1 |
263-3330 Module-Internal Modem
| 20***26 | Cable As-Communication | 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 |
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 |
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 |
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 |
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 |
258-8803 Panel Gp-Electrical -Disconnect Switch
| 24***12 | Switch-Disconnect; (Maintenance Bypass) | 3 |
| 24***14 | Shaft | 1 |
| 24***15 | Shaft | 2 |
203-5455 Panel Gp-Electrical
| 20***55 | Panel Group-Electrical | 1 |
| 23***76 | Panel Group-Electrical | 1 |
202-7511 Panel Gp-Electrical
| 18***09 | Resistor; (13-Watt) | 12 |
| 18***22 | Board As; (Dc Interface) | 1 |
| 20***28 | Capacitor | 12 |
258-9961 Panel Gp-Electrical
| 24***10 | Panel As-Electrical; -Power Supply | 1 |
| 25***22 | Transformer As | 1 |
| 25***61 | Panel Group-Electrical | 1 |
227-4833 Panel Gp-Electrical
| 22***33 | Panel Group-Electrical | 1 |
| 22***34 | Filter As-Electrical | 1 |
| 22***35 | Resistor | 2 |
251-9618 Panel Gp-Electrical
| 20***82 | Switch Group-Disconnect | 3 |
| 24***81 | Holder; (Fuse) | 3 |
| 25***57 | Shaft | 2 |
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 |
250-5521 Panel Gp-Electrical
| 20***32 | Power Supply; (350-Watt) | 2 |
| 25***21 | Panel Group-Electrical | 1 |
| 25***07 | Capacitor | 2 |
256-7282 Panel Gp-Electrical
| 25***82 | Panel Group-Electrical | 1 |
| 25***03 | Panel Group-Electrical; -Disconnect Switch | 1 |
| 25***05 | Handle As | 1 |
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 |
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 |
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 |
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 |
250-3437 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 2 |
| 20***67 | Fuse; (1-Ampere) | 3 |
| 20***69 | Circuit Breaker As; (1200-Ampere) | 1 |
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 |
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 |
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 |
248-5465 Panel Gp-Power Supply
| 20***65 | Fuse; (4-Ampere) | 2 |
| 20***66 | Fuse; (7-Ampere) | 2 |
| 20***74 | Module Group-Converter; -Rh | 3 |
258-9865 Panel Gp-Power Supply
| 20***48 | Panel-Access; (Top) | 1 |
| 24***11 | Capacitor; (Oil-Filled) | 1 |
| 24***24 | Contactor | 1 |
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 |
250-6034 Panel Gp-Power Supply
| 25***34 | Panel Group-Power Supply | 1 |
| 25***59 | Module Group-Alarm | 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 |
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 |
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 |
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 |
251-0043 Panel Gp-Power Supply
| 20***65 | Fuse; (4-Ampere) | 2 |
| 20***66 | Fuse; (7-Ampere) | 2 |
| 20***52 | . Coller, Sensor-Vacuum; (Flywheel Bearing) | 1 |
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 |
258-9866 Panel Gp-Power Supply
| 24***11 | Capacitor; (Oil-Filled) | 1 |
| 24***23 | Transformer | 1 |
| 24***24 | Contactor | 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***74 | Module Group-Converter; -Rh | 3 |
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 |
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 |
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 |
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 |
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 |
266-5936 Panel Gp-Power Supply
| 19***97 | Fuse; (3-Ampere) | 2 |
| 20***67 | Fuse; (1-Ampere) | 3 |
| 20***69 | Circuit Breaker As; (1200-Ampere) | 1 |
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 |
248-5466 Panel Gp-Power Supply
| 20***48 | Panel-Access; (Top) | 1 |
| 24***11 | Capacitor; (Oil-Filled) | 1 |
| 24***11 | Handle; (Door) | 1 |
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 |
248-5467 Panel Gp-Power Supply
| 24***23 | Transformer | 1 |
| 24***11 | Handle; (Door) | 1 |
| 24***24 | Ring | 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 |
202-7660 Panel Gp-Power Supply
| 20***40 | Door-Front | 1 |
| 20***48 | Panel-Access; (Top) | 1 |
| 20***80 | Panel As-Side | 1 |
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 |
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 |
202-7646 Power Gp-Uninterruptible
| 20***59 | Film Group | 1 |
| 20***46 | Power Group-Uninterruptible | 1 |
| 20***58 | Panel Group-Power Supply | 1 |
202-7647 Power Gp-Uninterruptible
| 20***47 | Power Group-Uninterruptible, .. Axle | 1 |
| 20***58 | Panel Group-Circuit Breaker | 1 |
| 22***83 | Conduit Group | 1 |
202-7645 Power Gp-Uninterruptible
| 20***59 | Film Group | 1 |
| 20***45 | Power Group-Uninterruptible | 1 |
| 20***58 | Panel Group-Power Supply | 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 |
202-7650 Power Gp-Uninterruptible
| 20***57 | Film Group | 1 |
| 20***50 | Power Group-Uninterruptible | 1 |
| 20***58 | Panel Group-Power Supply | 3 |
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 |
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
200-1857 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 |
200-1859 Film Gp
| 13***39 | Film-Stripe; (Red)(625cm) | 0 |
| 20***44 | Film; (Electric Power) | 1 |
| 20***59 | 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 |
250-6032 Parts Gp-Miscellaneous
| 18***55 | Fuse; (3-Ampere)(Output) | 10 |
| 18***60 | Fuse; (2-Ampere) | 10 |
| 19***04 | Fuse; (3-Ampere) | 10 |
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 |
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 |
230-4162 Parts Gp-Miscellaneous
| 18***55 | Fuse; (3-Ampere)(Output) | 10 |
| 18***60 | Fuse; (2-Ampere) | 10 |
| 18***61 | Fuse; (5-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 |
203-5448 Parts Gp-Miscellaneous
| 18***55 | Fuse; (3-Ampere)(Output) | 10 |
| 18***60 | Fuse; (2-Ampere) | 10 |
| 18***61 | Fuse; (5-Ampere) | 10 |
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 |
UPS 301 serial number reference
The rating/PIN plate on a Cat flywheel UPS module is mounted on the front access panel or side wall of the enclosure cabinet, near the main circuit breaker or control touchscreen, since the unit has no engine or chassis to carry a conventional PIN boss. Read the first three letters as the serial-number prefix identifying the model/build, followed by the sequential unit number, e.g. CSY00001.
| Prefix | Identifies | Notes |
|---|---|---|
| CSY | UPS 301 single-module flywheel UPS - dedicated serial prefix | Serial break CSY00001-UP is dedicated to the UPS 301 sales model, on its own parts-catalog listing separate from the combined schematic listings that cover other members of the flywheel-UPS line. Not shared with UPS 300 or any other sibling model found in catalog records. |
Frequently asked questions
What powers the UPS 301?
No engine. The UPS 301 is a battery-free, flywheel-based uninterruptible power supply module in Cat's UPS-Flywheel line. A spinning rotor stores ride-through energy mechanically, and an IGBT bi-directional converter moves that energy onto the protected load until a separately supplied standby diesel generator set starts and takes over.
What does the UPS 301 weigh?
Not published for this specific frame. Caterpillar catalogs the UPS 301 separately from the UPS 300 under its own dedicated serial prefix (CSY), so the UPS 300's published weight cannot be assumed to apply here. Confirm operating weight on the unit's own rating plate or with a Cat dealer.
What replaced the UPS 301, or what is it paired with?
Nothing supersedes it in Cat's current UPS-Flywheel lineup; it remains its own catalog entry in the Z-Series line and can be paralleled with other Z-Series modules for added capacity or N+1 redundancy. It is designed to pair with a separately supplied standby diesel generator set, bridged to it via an optional GenStart cranking-assist module, rather than with any successor UPS model.
What UPS 301 owners discuss
Does the UPS 301 have its own diesel engine, or is it really a generator set?
No engine is fitted. This is a stationary, battery-free flywheel energy-storage module in Cat's UPS-Flywheel line. It stores energy in a spinning rotor and bridges the critical load electrically the instant utility power is lost, then holds it until a separately supplied Cat diesel generator set starts, synchronizes, and takes over. This model is cataloged as its own distinct entry with its own dedicated serial break, not a rebadge of a neighboring frame in the line, and it carries no crankcase, fuel tank, or combustion engine of its own. A standalone kVA/kW rating tied specifically to this model number was not found in accessible literature — read it off the unit's own rating plate rather than assume it matches a similarly numbered sibling.
What wears out on a flywheel UPS like this the way bearings and undercarriage wear on mobile machines?
The rotor bearings and, on vacuum-housed designs, the vacuum system are the main wear items. Older mechanical (ball) bearing rotor designs are reported needing bearing replacement on intervals as short as annually; magnetic-levitation rotor designs used on newer builds in this product line run with little to no contact-bearing wear and correspondingly less scheduled bearing work. Which design is fitted varies by build/series, so confirm against the unit's own manual rather than assume. Where the rotor spins inside a vacuum housing to cut windage drag, the vacuum pump is a separate wear item with a typical service life in the 8 to 10 year range — watch vacuum level and the oil sight gauge on schedule. None of these intervals are published as a figure specific to this model; treat them as typical for the flywheel-UPS platform and confirm against this unit's own Operation and Maintenance Manual.
How does the static bypass switch behave during a ride-through event?
The static bypass switch is a thyristor (SCR) assembly sitting between utility power and the critical load. In normal operation the flywheel module carries the load; the instant the module itself goes out of tolerance — an internal fault, not a utility disturbance — the bypass switch fires and puts the load straight onto raw utility power almost instantaneously, so the critical bus stays powered even if the UPS electronics trip. A separate hand-operated maintenance bypass routes power fully around the electronics for planned service. A shorted or failed switching device in the bypass path is one of the more commonly cited alarm and failure sources on this class of unit. Have your dealer verify the bypass switch and its fault log before returning the unit to service after any bypass-related alarm.
How is the flywheel module supposed to coordinate with the paired diesel generator's start time?
An optional generator-set-start module, confirmed fitted to this model in its own parts catalog, lets the unit crank the standby diesel genset the instant utility power drops, supplying on the order of 1,725 cold-cranking amps at 24 VDC through an integrated battery charger; single- and dual-circuit-breaker versions exist for redundant starter wiring. The flywheel is meant to carry the load only long enough for that genset to start, stabilize, and synchronize — a walk-in time that is field-programmable and commonly set somewhere from a few seconds up to about 15 seconds across this product line, though the exact figure varies by configuration and site commissioning. If the paired generator historically starts slow or fails to synchronize inside its programmed window, treat that as a commissioning setting to revisit with the service provider rather than something to change in the field without engineering sign-off.
What alarm or monitoring quirks come up on this class of unit?
Fault reports center on the power-electronics side rather than a mechanical driveline: inverter/IGBT faults, driver-board faults, output short-circuit trips, and control-board faults are the most commonly cited causes of an inverter alarm. Flywheel speed and vacuum-level sensors throw their own out-of-range alarms, and the bypass switch is a frequent alarm source in its own right. The touchscreen operator interface and integral remote-communication modem log these faults and, on networked sites, forward them to a monitoring platform — check that log first before opening any panel. Escalate any inverter, control-board, or bypass-switch fault to a qualified UPS technician; have your dealer verify the fault condition before returning the unit to service.
What enclosure or cooling considerations come up in the field?
The module ships in a floor-standing cabinet with separate input/output, control, and flywheel-module sections, with conduit entry at both the top and bottom of the enclosure. Cooling is forced-air rather than liquid — there is no engine coolant circuit — so intake and cabinet air filters are the routine cooling-related service item, commonly checked or changed on a roughly quarterly interval on units in this class. Keep clearance around the cabinet's air intake and exhaust per the installation drawing; a starved or blocked filter is a common driver of nuisance over-temperature alarms on this style of unit.
What should I check before buying or inheriting a used UPS 301?
Pull the full maintenance history and the alarm/fault log off the operator interface before anything else — this is power-electronics gear, and condition cannot be judged by looking at it sitting idle. Confirm the unit's identity against its own rating plate and serial prefix; this model carries its own dedicated serial break, distinct from other frames in the flywheel-UPS line, so do not assume specs from a similarly numbered sibling apply. Weigh its age against the roughly 15 to 20 year typical service life for this class of flywheel UPS, and check the vacuum pump's age and sight-gauge condition separately against its own roughly 8 to 10 year life. Find out whether the rotor uses mechanical bearings, a shorter and sometimes annual replacement interval, or a magnetic/sealed design with little to no scheduled bearing work, and when bearing service was last done. If a generator-start module is fitted, confirm its battery-charger and starter-circuit wiring are intact and tested. Have your dealer or a qualified technician power up and load-test the unit, and verify the de-energize/lockout procedure, before you rely on it — a unit that looks fine sitting idle can still have a rotor or vacuum system that is not safe to spin up without inspection.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific UPS 301 part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.