Comparison of DC Safety in Communication Power Supply Cabinets

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View/Download Comparison of DC Safety in Communication Power Supply Cabinets [PDF]

PDF version includes complete article with source references. Suitable for printing and offline reading.

4 FAQs about Comparison of DC Safety in Communication Power Supply Cabinets

What is the role of DC cabinet in high-voltage switchgear cabinet?

Role of DC cabinet: It mainly provides power supply for high-voltage switch closing mechanism, the DC mini-bus on the top of high-voltage switchgear cabinet provides DC power supply for signaling, controlling, alarming and other circuits, as well as DC power supply for relay protection and automatic devices.

How many power supplies can a 24U cabinet support?

For single cabinet requirements, two cabinet heights are of-fered. The 24U cabinet can accommodate up to four 30kW DC power supplies or up to four 30kW regenerative DC loads. Power levels to 120kW are supported by this cabinet size. For requirement up to 240kW, the 42U cabinet is needed.

How many DC buses can a multi-cabinet system have?

The DC bus is directly accessible on specific connection points (screws). The multi-cabinet solu-tions can have up to three DC buses which are connected in parallel from cabinet to cabinet via cables. The construction of the cabinets ensures high safety for per-sonnel.

Why is safety important in a high power cabinet?

Safety is the primary and most important matter. Every unit has high voltages that could be fatal. In high-power units short-circuit currents can be significant. Safety consists of two main points: first, the cabinet has been made safe to use and second, that the actual installation of the cabinet is carried out safely without personal injury.