Technology for Function and Structural Arrangement of the Relay Protection ...
23.02.12
&Ndash; data storage (short-term for a processing period, long-term for a transmission to other devices, constantly).
The microprocessor relay protection and automation unit uses and processes low-voltage and low-level signals, therefore it is separated from the power part by a shielding to exclude influence of powerful electromagnetic fields. Shielding is represented by a relay protection cabinet (PC) that integrates all items of low-voltage equipment in the cabinet.
Taking the restricted space inside switchboard rooms into consideration, all reasonable measures must be taken to reduce overall dimensions of switchboards, that is admissible only by reducing cabinets’ dimensions, as the switchboards’ structure is defined by the structure of the equipment connected and the requirements for safe operation.
Limitations for approaching the parts in power compartments, if the air insulation is used, are severe. They are primary determined by insulating properties of the air and, hence, dimensions of these compartments can not be sufficiently reduced.
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