{
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  "description": "A soft start circuit of a UPS relay includes a three-phase pre-charging module, a first PFC module, a second PFC module, a relay module, a three-phase input voltage detection module, a bus voltage detection module and a relay control module. The relay control module is electrically connected to the…",
  "path": "/patents/1364976",
  "publishedAt": "2024-06-13T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J9/06",
    "Vertiv Corporation"
  ],
  "textContent": "A soft start circuit of a UPS relay includes a three-phase pre-charging module, a first PFC module, a second PFC module, a relay module, a three-phase input voltage detection module, a bus voltage detection module and a relay control module. The relay control module is electrically connected to the three-phase input voltage detection module and the bus voltage detection module and controls the connection of the relay module, to control part of relays in the relay module to be turned on based on the A-phase input voltage, the B-phase input voltage, the C-phase input voltage and the bus voltage to soft start the relay. The relay can be safely turned on without being damaged by an impact current in a case that an input voltage is unbalanced.",
  "title": "SOFT START CIRCUIT OF UPS RELAY"
}