Arc protection system and method to control arc protection system

1. An arc protection system comprising:

a sensor configured to sense an arc fault of a distribution panel;

an arc removing unit configured to ground a fault current;

a control unit connected to the sensor and configured to measure a short circuit current value of the distribution panel; and

a circuit breaking unit installed to open or close a circuit of the distribution panel,

wherein, when the arc fault is sensed and the short circuit current value corresponds to a three-phase short circuit current, the control unit is configured to drive the arc removing unit, and, when the short circuit current value is smaller than the three-phase short circuit current, the control unit is configured not to drive the arc removing unit,

wherein, when the short circuit current value is equal to or greater than a first setting value, the control unit is configured to determine that the three-phase short circuit current flows, and, when short circuit current value is equal to or greater than a second setting value that is smaller than the first setting value, the control unit is configured to open the circuit breaking unit, and

wherein the first setting value is set to be 5 to 8 times of a rated current, and the second setting value is set to be within a range of one or two times of the rated current.

2. The arc protection system of claim 1 , wherein the distribution panel comprises: a main circuit; and a plurality of sub-circuits to which power is distributed from the main circuit,

the circuit breaking unit comprises: a main circuit breaker configured to open or close a current of the main circuit, and a sub-circuit breaker configured to open or close a current of the sub-circuits, and

the sensor comprises: a first sensor installed in the main circuit, and a second sensor installed in the sub-circuits,

wherein, when the arc fault is sensed by the first sensor, the main circuit breaker is configured to open, and, when the arc fault is sensed by the second sensor, the sub-circuit breaker is configured to open.

3. 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,

wherein the determining of the range comprises:

determining if the range of the short circuit value is equal to or greater than a first setting value, between the first setting value and a second setting value, or smaller than the second setting value, the second setting value being smaller than the first setting value;

determining a short circuit current as the three-phase phase short circuit current, when the short circuit current value is equal to or greater than the first setting value; and

opening a circuit breaking unit, when the current value is equal to or greater than the second setting value, to remove a current caused by the arc fault, and

wherein the first setting value is set to be 5 to 8 times of a rated current, and the second setting value is set to be within a range of one or two times of the rated current.

4. The control method of claim 3 , wherein a circuit breaker of a main circuit or a circuit breaker of a sub-circuit to which power is distributed from the main circuit is selectively opened according to a position at which the arc fault is sensed.

5. 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.

6. The arc protection system of claim 5 , wherein when the sensor in the second distribution panel senses the arc fault, the first control unit transmits the short circuit current state value of the first distribution panel to the second control unit, and

the short circuit current state value comprises a short circuit current value or whether the short circuit current is generated.

7. The arc protection system of claim 6 , wherein the second control unit determines whether the short circuit current is generated using the short circuit current value of the first distribution panel, which is transmitted from the first control unit, or calculates a short circuit current value of the second distribution panel,

drives the arc removing unit when the short circuit current value of the second distribution panel is calculated and the calculated short circuit current value of the second distribution panel exceeds a setting value,

the setting value is a lowest value of a current value at a time of three-phase short circuit of the second distribution panel, and

the second control unit drives the arc control unit, when the calculated short circuit current value of the second distribution panel corresponds to the current at the time of the three-phase short circuit.

8. The arc protection system of claim 5 , wherein the first unit and the second unit comprise a connection for a digital signal for transmitting and receiving bi-directionally the short circuit current value.

9. The arc protection system of claim 5 , wherein the tie is formed to electrically connect or separate the first distribution panel and the second distribution panel, and is connected on the connection for the digital signal, and

the first control unit transmits a short circuit current value measurement state of the first distribution panel to the second control unit in a state in which the tie is connected.

10. The control method of claim 5 , wherein the first distribution panel and the second distribution panel are electrically connected with or separated from each other by a tie, and

a short circuit current value measurement state of the first distribution panel is transmitted to the second distribution panel in a state in which the tie is connected.