Earth leakage breaker and arc detection apparatus attachable/detachable to/from same earth leakage breaker

1. An earth leakage breaker and an arc detection apparatus, comprising:

a body of the earth leakage breaker; and

an arc detection module detachably coupled to the body of the earth leakage breaker so as to detect an arc current,

wherein the arc detection module comprises:

an arc detection unit connected to a first load side terminal of the body of the earth leakage breaker so as to detect the arc current flowing through a line;

a control unit for determining the arc current on a basis of an arc detection signal delivered by the arc detection unit; and

an output unit for outputting a signal or a current, according to a control signal of the control unit,

wherein the arc detection module is provided with a connection terminal disposed on one side thereof to be connected to the first load side terminal, and a second load side terminal disposed on another side thereof to connect the connection terminal and a load, and

wherein the output unit is provided with one output terminal connected to any one phase of the connection terminal, and another output terminal connected to another phase of a power source side terminal of the body of the earth leakage breaker.

2. The earth leakage breaker and the arc detection apparatus of claim 1 , wherein the body of the earth leakage breaker comprises a breaking unit to open and close the line, and a trip coil to operate the breaking unit, wherein the trip coil operates according to the signal or current output from the output unit.

3. The earth leakage breaker and the arc detection apparatus of claim 2 , wherein the body of the earth leakage breaker is provided with a switch terminal hole through with a switch terminal connected to a switch element for opening and closing a circuit connected to the trip coil, and the arc detection module is provided with a terminal hole through which at least one of the one output terminal and the another output terminal of the output unit is exposed to be connected to the switch element.

4. The earth leakage breaker and the arc detection apparatus of claim 1 , wherein the arc detection module further comprises a power supply unit to supply direct-current (DC) power to the control unit and the output unit.

5. The earth leakage breaker and the arc detection apparatus of claim 1 , wherein the another output terminal of the output unit is provided with an output resistor.

6. The earth leakage breaker and the arc detection apparatus of claim 1 , wherein the body of the earth leakage breaker is provided with a first test unit to generate a simulated leakage current for a leakage current detection function test, and the arc detection module is provided with a second test unit to generate a simulated arc current for an arc current detection function test.

7. The earth leakage breaker and the arc detection apparatus of claim 6 , wherein the body of the earth leakage breaker is provided with a test terminal hole through which a test terminal connected to the first test unit is exposed, and the arc detection module is provided with a terminal hole through which at least one of the one output terminal and the another output terminal of the output unit is exposed to be connected to the test terminal.

8. The earth leakage breaker and the arc detection apparatus of claim 1 , wherein the arc detection module is provided with a display unit connected to the control unit to display characteristics of electricity flowing on the line.

9. The earth leakage breaker and the arc detection apparatus of claim 1 , wherein the body of the earth leakage breaker is provided with a first load side terminal hole through which the first load side terminal is exposed, and the arc detection module is provided with a coupling protrusion protruding therefrom to be fitted to the first load side terminal hole.