The security area is divided into protection zones and follows the shell principle with generally increasing burglary protection (protection class). A protection class is defined for each protection zone, which specifies the burglar-resistant quality of walls, doors, windows and grilles. Protection class 1 is used for the outermost protection zone. It corresponds to at least resistance class RC 2 in accordance with EN 1627. The burglar-resistant properties of the other protection classes depend on the risk analysis and are clearly explained in the security concept.
C: Air conditioning systems and electrical distribution systems are installed in areas of at least protection class 3 with regard to resistance to unauthorised access. This also applies to power supply systems that are the responsibility of the data centre operator.
Routes that run in areas of lower protection classes are monitored there for unauthorised access.
The specification was missing in requirement class C.
Lines carrying liquids must not run above electrical systems (control systems, distributors, IT installations, switch cabinets, etc.) if they do not supply the local air conditioning technology (e.g. in-line coolers, recirculating air coolers). In the event of a leak, liquid quantities must always be limited by appropriate shut-off devices.
B: Implementation as described in the text above.
C: In addition, all external pipes carrying liquids are not permitted in the IT rooms.
The explicit room reference has been removed as the criterion applies universally.
Remote transmissions from the intruder alarm system are transmitted securely in accordance with EN 50136. The alarm receiving centre meets the basic structural, safety and organisational requirements of EN 50518.
C: Realisation as described in the text above.
The "C" was missing at level 2.
Supplies from the public grid and stationary emergency power systems are accepted as power sources. The lines of the primary and secondary supply are routed on separate routes or with special protection against external influences up to the common connection. The secondary supply is independent of the primary supply.
B: The redundant network connection is either
In this case, the stationary emergency power system is designed redundantly
(component redundant n+1 or system redundant 2n).
C: The redundant grid connection is either
The criterion was not shown.
Couplings between redundant low-voltage distributions are protected against faulty switching operations.
B: Mains couplings between secondary distributions (sub-distributions, e.g. UV UPS) are protected on both sides with a circuit breaker. Both switches are open during normal operation and are only switched manually.
C: Mains couplings between secondary distributions (sub-distributions, e.g. UV UPS) are not permitted.
Linguistic clarification has not been adopted.
The transformers of each supply path are dimensioned so that they can handle the full DC load; in addition, power reserves of the transformers are taken into account in the design.
Low-voltage switchgear complies with the EN 60947 series of standards.
Low-voltage switchgear combinations comply with the EN 61439 series of standards.
High- and medium-voltage switchgear comply with the EN 62271-200 standard.
In the case of multi-level expansion concepts, the selection of components enables a scalable or modular solution.
C: Realisation as described in the text above.
Assignment and transposed numbers have not been adopted.
Functional and integration tests were carried out and documented during initial commissioning. When replacing systems (chiller, ULK, etc.), test certificates are available from the manufacturer and limited functional tests have been carried out.
B: Implementation as described above in the text.
C: Full load tests have been carried out during initial commissioning.
Assignment and transposed numbers have not been adopted.