| 摘要 |
<p>The invention relates to a device, which, supplied from two-phase voltage power sources, is capable to furnish electric energy at its output, as long as at least one of the sources has a voltage of a value within the setable admissible range. According to the invention, the ultrafast device for automatically switching in the reserve power is a static device made of electronic components for power and control in a monophase or three phase version mainly consisting of a decision, control and supply block (BDCA), two monophase statical contactors (CS-1 and CS-2), two phase surveying relays in monophase version (RSFM1 and RSFM2), an overload and short-circuit protection relay (P), a current transducer (TC). The switching from one source to another is carried out without passing though zero. In the most disadvantageous case wherein the voltage on the path in operation would disappear completely, the lack of voltage at the output of the ultrafast device for automatically switching in reserve power last at most 4 ms, which is imperceptible for the most sensitive consumers: computers, fluorescent lighting and special technological processes. The application field of the invention is very wide from a secure power supply of industrial and social objectives to domestic use.</p> |
