Piller CPM300/360 Critical Power module: Double Conversion UPS

The Piller Critical Power Module (CPM) topology is designed to deliver optimum performance combined with all of the operational features demanded by the modern data centre. The module houses its own energy storage with sufficient guaranteed capacity for delayed transition to standby generators. Capable of operating in up to four different modes, the CPM affords the perfect balance between required levels of protection and electrical efficiency.

  • 300/360kW Modules designed to be scalable up to 2400/2880kW
  • Efficiency above 96% at 25% load (IEC 62040-3)
  • No Battery risk, no Battery replacement
  • Quiet operation
  • Advanced connectivity
  • Ideal for rapid deployment

The energy store is self-contained within the module and designed to operate with extremely low losses. The CPM is designed with total costs, implementation speed and ease of maintenance in mind.

Whole life costs:

  • Static UPS technology with an integrated energy store, saving space, installation and testing time – ready to go upon arrival
  • Extended (10 year) major maintenance interval with simple on-site works
  • Light touch, single visit annual maintenance
  • Extremely high operating efficiency – minimised losses and cooling requirements
  • Ambient up to 50°C for optimum use of free cooling

High Availability design:

  • No Battery autonomy testing or monitoring required- guaranteed storage capacity
  • Variable speed, long life, hot swappable fans
  • Withdrawable long life capacitor assemblies and IGBT stacks
  • Minimal routine preventative maintenance

Rapid Deployment:

  • Two cabinet assembly (or skid mounted, pre-tested) for immediate use
  • No battery room preparation or battery build
  • No DC cabling installation
  • Minimum site time
  • Citing possible in technical space, service corridor or plant room
  • Containerised version

Multiple Operating modes

The CPM is capable of operating in a number of different modes in order to provide the best economic operation combined with full load protection. In normal mode, the CPM provides full double conversion (VFI) conditioning at very high efficiencies across the load range. If the input supply characteristics permit, the IEC version can be selected to automatically run in VI (voltage conditioning) mode for even higher efficiencies or the IEC and UL CPM can be set to select VFD (ECO) mode where operating efficiencies can approach 99%.

Multiple modules operating in parallel, can also have Enhanced Redundancy Mode (ERM) invoked. When ERM is activated, the system will determine the minimum number of modules necessary to maintain the required resilience, placing the other units in active standby to maximise system efficiency.

Optimised efficiency

The CPM can be set to operate in several different modes or to automatically switch between modes depending upon input supply quality, in order to maintain a pre-determined output quality.

AC-AC Efficiency of CPM measured according to IEC 62040-3

Maximum operating efficiencies are achieved in VFD mode where efficiency can be higher than 98% with the energy store connected. A similar level can be achieved in VI conditioning mode. At all load levels and in all modes of operation, efficiency is substantially higher than any other UPS with a built in kinetic energy store.

Download: Powerbridge & CPM - ideally matched to modern GenSets

Standard Features

  • Multiple operating modes
  • 100kA short circuit withstand
  • Up to 98.5% efficient
  • Variable speed cooling fans
  • 10 inch WXGA Touch Panel
  • Parallel up to 8 units
  • Secure Web-based App monitoring
  • Top and bottom cable entry
  • Enhanced Redundancy Mode
  • Unity input power factor (>0.99)
  • Load locus 0pf lagging to 0.9pf capacitive without derating
  • POWERBRIDGE™ PB6+ kinetic energy store
  • UL 1778 Approved (UL version only)
  • Dual input capability
  • EMC class C3 to IEC 62040-2
  • Paralleling capability
  • FCC Part 15J compliance (UL version only)
  • SD-card long term event storage

Optional Features

  • Remote monitoring and fault diagnosis
  • SNMP, Webserver, OPC or RCP communication
  • Modbus TCP/IP communication
  • Customer programmable I/O card
  • Install Options

The CPM can be supplied pre-assembled and tested on a skid, thereby allowing immediate installation and connection inside a building with minimal effort and site time.

Alternatively, the CPM module can be supplied containerised with other modules and switchgear ready for deployments in facilities requiring the M&E infrastructure to be house externally in all or part.


The Piller Critical Power Module is designed for only the lightest of touches with annual maintenance. There is no requirement for invasive and risky battery autonomy testing. There is no time wasted collecting and analysing battery readings, the interpretation of which is at best speculative. One simple annual inspection with replacement of any consumables, keeps the CPM in proper working order and provides peace of mind for the client. Every customer receives a detailed report on the condition of the unit and of the power conditioning events experienced by the UPS since the last report. Periodic overhaul (typically after 10 years) is also straightforward and can be conducted easily and quickly with the unit in situ.