Object of the thesis was to compare 2 alternative systems with 2 existing supply systems for data centres. First of all the systems have different philosophies for redundance. The first two Typees have their main-busbar and the components of the uninterruptable power supply in a 100 % redundancy, the other Typees just in a n+1 redundancy, so that only 33 % (3 essential and 1 redundant components) redundancy is built. Second the big components emergency generator and chiller - low voltage connected peripheral once and once connected at the mid voltage busbar. Consequently 4 various Typees were analysed.

Type	Criterias	just realized
Type 1	100 % redundancy for busbars and uninterruptable power supply. Chiller and emergency power system will be integrated peripheral in the low voltage system.	yes
Type 2	100 % redundancy for busbars and uninterruptable power supply. Chiller and emergency power system will be integrated central by the mid voltage supply.	no
Type 3	33 % (n+1) redundancy for busbars and uninterruptable power supply. Chiller and emergency power system will be integrated peripheral in the low voltage system.	yes
Type 4	33 % (n+1) redundance for buses and uninterruptable power supply. Chiller and emergency power system will be integrated central by the mid voltage supply.	no

The result shall be the comparison of the investment costs, the required space and the disposibility of the components at the market.