Numerical Ranking
|
Terminology
|
Summary Definition
|
| 1 |
Unreliable |
- Shared power and cooling
- No generator
- No fire separation (standard construction materials)
- No fire suppression
|
| 2 |
Unreliable/Improved Power |
- Dedicated Unconditioned Power
- Shared building cooling
- No generator, no TVSS
- Non-redundant air conditioning
- No fire separation
- Wet or no sprinklers
|
| 3 |
Unreliable-Improved Power/Cooling |
- Independent power and cooling
- No UPS, generator or TVSS
- Non-redundant dedicated A/C
- No fire separation
- Wet or no sprinklers
|
| 4 |
Conditioned |
- Dedicated power and cooling
- Conditioned power (no UPS or generator)
- Dedicated non-redundant A/C units
- Limited fire rating (<1hr, wet sprinklers)
|
| 5 |
Isolated |
- Dedicated power & cooling systems
- Single UPS (no back-up), No generator
- Non-redundant dedicated A/C units
- Fire rating of 1 hour
- Limited / wet suppression
|
| 6 |
Improved-Isolated |
- Dedicated power, UPS and cooling
- Redundant dedicated A/C units
- No generator
- Fire rating of 1hour
- Smoke detection / pre-action sprinkler system
|
| 7 |
Reliable |
- Dedicated power, UPS, cooling systems
- Redundant & dedicated A/C units
- Single back-up generator
- Fire rating 1hr
- Intelligent detection system
- Pre-action Sprinkler System
|
| 8 |
Reliable/Redundant |
- Dedicated & redundant power and cooling components
- Redundant UPS, A/C, generators
- Dedicated generators / single fuel system
- Fire rating 1 hour
- Intelligent Detection System
- Pre-action sprinkler system
- Optional gaseous fire suppression system
|
| 9 |
Highly Reliable |
- Fully redundant: (power train, cooling systems
- Redundant UPSs, A/C, Generators, fuel systems
- Physical segregation of redundant systems
- Fire rating 1 hour
- Intelligent detection system
- Pre-action sprinkler system
- Optional gaseous fire suppression system
|
| 10 |
Geographically Hardened & Redundant |
- All Redundant: (power train, cooling system, UPS systems, generators, fuel systems
- Physical segregation of redundant systems
- Fire rating of 2 hours
- Intelligent detection system
- Pre-action sprinkler system
- Optional gaseous fire suppression system
- Site is hardened for weather and geographic exposures
- Location minimizes exposure to jurisdictional closure from hazardous spill, acts of terrorism, sabotage or similar risks
|
* This is a summary of BRUNS-PAK's Reliability Scale. A more detailed breakdown of the architectural, electrical, mechanical, fire suppression, and security elements within the BRUNS-PAK 1-10 scales is addressed in BRUNS-PAK's initial consulting engagements.