Patent ID: 11870235
Assignee: LS ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. The self power relay of claim 1, wherein the relay unit includes:
a circuit breaker to cut off the system power to be transmitted to a load when a failure of a power transmission and distribution line or a power system occurs;
an abnormality sensing unit configured to monitor in real time three phases system powers used as the source power of the self power generator and to generate a second fail signal when abnormality occurs in the three phases system powers;
a relay controller configured to:
measure a system power amount of the power transmission and distribution line or the power system and control a cut-off operation of the circuit breaker when a failure occurs in the power transmission and distribution line or the power system; and
stop the relaying operation of the relay unit and the operation of the self power generator when the second fail signal is issued; and

a self power unit for changing a voltage level of the driving power input from the self power generator to a preset level and supply the driving power having the preset level to the abnormality sensing unit and the relay controller.