Arc protection system and method to control arc protection system

A control method of an arc protection system, the control method comprising:

• sensing an arc fault when the arc fault occurs in a distribution panel, and measuring a short circuit current value of the distribution panel;
• determining a range of the short circuit current value;
• and
• grounding a fault current, when the short circuit current value corresponds to a three-phase short circuit current.

An arc protection system of a distribution panel that supplies power from an upper bus to a plurality of lower buses, the arc protection system comprising:

• a first distribution panel, a second distribution panel, and a tie configured to electrically connect the first distribution panel and the second distribution panel,
• wherein each of the first distribution panel and the second distribution panel comprises:
• a sensor configured to sense an arc fault of the distribution panel;
• an arc removing unit configured to ground a fault current;
• and
• a circuit breaking unit installed to open or close a circuit of the distribution panel,
• wherein the first distribution panel comprises a first control unit connected to the sensor and configured to measure a short circuit current value of the first distribution panel,
• the second distribution panel comprises a second control unit connected to the sensor and configured to measure a short circuit current value of the second distribution panel,
• the first control unit and the second control unit share a short circuit current state value in a state in which the circuit breaking unit of the second distribution panel is open,
• the short circuit current state value comprises a short circuit current value or whether a short circuit current is generated,
• the second control unit uses the short circuit current state value of the first distribution panel when the sensor of the second distribution panel senses the arc fault, drives the arc removing unit when a three-phase short circuit current is determined to be generated in the second distribution panel, and does not drive the arc removing unit when the three-phase short circuit current is not determined to be generated.

A control method of an arc protection system, the control method comprising:

• sensing an arc fault in a second distribution panel, and measuring a short circuit current state value of a first distribution panel electrically connected to the second distribution panel, when the arc fault occurs in a state in which a circuit breaking unit of the second distribution panel is open;
• transmitting the short circuit current state value of the first distribution panel to the second distribution panel;
• determining whether a short circuit current is generated in the second distribution panel or calculating a short circuit current value of the second distribution panel using the short circuit current state value of the first distribution panel;
• and
• determining a range of the calculated short circuit current value of the second distribution panel and grounding a fault current, when the short circuit current value of the second distribution panel corresponds to a three-phase short circuit current.