We have an individual rating recognized by the UPTIME INSTITUTE
CAT® was the first manufacturer to carry out, with participation from the Uptime Institute, an investigation in Data Centers to which it had supplied generator sets. As a result of such analyses a dedicated operating mode was developed for the generator sets, which meets all the requirements for Tier III and IV Certification – Mission Critical Standby. In the Mission Critical Standby mode, the generator sets may work under 100% load for an unlimited number of hours. This guarantees to the Project Owners that the capabilities of generator sets will be fully used, as their operation is optimized for the needs of Data Centers.
The use of Caterpillar generator sets ensures full energy security of Data Centers in terms of both certification and optimum selection of generator sets for the needs of the Customer.
Uptime Institute classification of generator sets
Engine generators for Tier III and IV sites shall not have a limitation on consecutive hours of operation when loaded to ‘N’ demand.
Engine generators that have a limit on consecutive hours of operation at N demand are appropriate for Tier I or II.
Summary of requirements concerning system security for generator sets.
| REQUIREMENTS FOR GENERATOR SETS | TIER i | TIER ii | TIER III | TIER iV |
|
MODE OF SUPPLYING RATED POWER FOR TAKING OVER DESIGN LOAD |
NO SPECIAL REQUIREMENTS, THE GENERATOR SET TAKES OVER DESIGN LOAD UP TO THE RATED POWER LEVEL | NO SPECIAL REQUIREMENTS, THE GENERATOR SET TAKES OVER DESIGN LOAD UP TO THE RATED POWER LEVEL | THE GENERATOR SET MAY TAKE OVER DESIGN LOAD IN THE CONDITIONS PREVAILING AT THE PLACE OF OPERATION, WITHOUT ANY TIME LIMITATION | THE GENERATOR SET MAY TAKE OVER DESIGN LOAD IN THE CONDITIONS PREVAILING AT THE PLACE OF OPERATION, WITHOUT ANY TIME LIMITATION |
| CONTINUOUS MODE | NO ADDITIONAL REQUIREMENTS AS TO LIMITATION ON NUMBER OF WORKING HOURS | FULL RATED POWER | ||
| PRIME MODE | OPTION 1: 70% OF RATED POWER
OPTION 2: HIGHER CAPACITY THAN UNDER OPTION 1, CONFIRMED WITH A DOCUMENT FROM THE MANUFACTURER |
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| STANDBY MODE | THIS GENERATOR SET MAY BE USED IN TIER III AND IV SITES IF DOCUMENTS FROM THE MANUFACTURER ARE AVAILABLE; TIER CERTIFICATION DEPENDS ON THE DOCUMENTS FROM THE MANUFACTURER | |||
| DE-RATING DUE TO CONDITIONS PREVAILING AT THE PLACE OF OPERATION | DE-RATING MAY BE NECESSARY DUE TO CONDITIONS PREVAILING AT THE PLACE OF OPERATION (AMBIENT TEMPERATURE, HEIGHT ABOVE SEA LEVEL) – VERIFICATION AGAINST MANUFACTURER’S REQUIREMENTS IS NECESSARY | |||
For example:
At Data Center Moscow, each CAT® generator set supplies 2 MW of backup power in a compact system. This means that it meets the requirements of the ISO 8528-5 standard and takes over 100% of rated load during the entire year.