A low voltage switchgear assembly for AC and DC power distribution in a data centre comprising: - a main breaker module including a general circuit breaker, for switching an AC supply bus; wherein the main breaker module is a separate module having multiple AC supply bus bars, one per each phase; - two or more AC/DC converter modules for converting AC power from the AC supply bus to DC power, wherein each of the AC/DC converter modules comprises two or more AC supply bus bars which are configured to be coupled to the AC supply bus bars of other AC/DC converter modules and to the AC supply bus bars of the main breaker module, DC power distribution bus bars, and an AC/DC converter unit having a DC output which is coupled to the DC power distribution busbars, wherein the DC power distribution busbars of the AC/DC converter modules are configured to be coupled to each other to form a common DC power distribution bus which passes through all coupled AC/DC converter modules, and - two or more AC/AC converter modules for converting AC power from the AC supply bus to AC power, wherein each AC/AC converter module comprises two or more AC supply bus bars, two or more AC power distribution busbars which are configured to be coupled to each other to form an AC power distribution bus, and an AC/AC converter unit which receives AC power supplied via the AC supply busbars of the AC/AC converter module, and outputs converted AC power on the AC power distribution bus bars, - wherein in the low voltage switchgear assembly, the main breaker module, the AC/DC converter modules and the AC/AC converter modules are electrically interconnected and arranged side by side, the AC supply bus bars of the AC/AC converter modules together with the AC supply bus bars of the main breaker module and the AC supply bus bars of the AC/DC converter modules form a common AC supply bus, and the outputs of the AC/DC converter units of the AC/DC converter modules and the outputs of the AC/AC converter units of the AC/AC converter modules are electrically coupled to each other in paralllel by means of the respective DC power distribution bus bars or AC power distribution bus bars. a data centre comprising: - a main breaker module including a general circuit breaker, for switching an AC supply bus; - a main breaker module including a general circuit breaker, for switching an AC supply bus; wherein the main breaker module is a separate module having multiple AC supply bus bars, one per each phase; - two or more AC/DC converter modules for converting AC power from the AC supply bus to DC power, wherein each of the AC/DC converter modules comprises two or more AC supply bus bars which are configured to be coupled to the AC supply bus bars of other AC/DC converter modules and to the AC supply bus bars of the main breaker module, - two or more AC/DC converter modules for converting AC power from the AC supply bus to DC power, wherein each of the AC/DC converter modules comprises two or more AC supply bus bars which are configured to be coupled to the AC supply bus bars of other AC/DC converter modules and to the AC supply bus bars of the main breaker module, DC power distribution bus bars, and an AC/DC converter unit having a DC output which is coupled to the DC power distribution busbars, wherein the DC power distribution busbars of the AC/DC converter modules are configured to be coupled to each other to form a common DC power distribution bus which passes through all coupled AC/DC converter modules, and - two or more AC/AC converter modules for converting AC power from the AC supply bus to AC power, wherein each AC/AC converter module comprises two or more AC supply bus bars, two or more AC power distribution busbars which are configured to be coupled to each other to form an AC power distribution bus, and an AC/AC converter unit which receives AC power supplied via the AC supply busbars of the AC/AC converter module, and outputs converted AC power on the AC power distribution bus bars, - wherein in the low voltage switchgear assembly, the main breaker module, the AC/DC converter modules and the AC/AC converter modules are electrically interconnected and arranged side by side, the AC supply bus bars of the AC/AC converter modules together with the AC supply bus bars of the main breaker module and the AC supply bus bars of the AC/DC converter modules form a common AC supply bus, - two or more AC/AC converter modules for converting AC power from the AC supply bus to AC power, wherein each AC/AC converter module comprises two or more AC supply bus bars, two or more AC power distribution busbars which are configured to be coupled to each other to form an AC power distribution bus, and an AC/AC converter unit which receives AC power supplied via the AC supply busbars of the AC/AC converter module, and outputs converted AC power on the AC power distribution bus bars, - wherein in the low voltage switchgear assembly, the main breaker module, the AC/DC converter modules and the AC/AC converter modules are electrically interconnected and arranged side by side, the AC supply bus bars of the AC/AC converter modules together with the AC supply bus bars of the main breaker module and the AC supply bus bars of the AC/DC converter modules form a common AC supply bus, and the outputs of the AC/DC converter units of the AC/DC converter modules and the outputs of the AC/AC converter units of the AC/AC converter modules are electrically coupled to each other in paralllel by means of the respective DC power distribution bus bars or AC power distribution bus bars.