KR200263747Y1 - Auxiliary apparatus for operating leak-breaker the bad contact of power line - Google Patents

Abstract

The present invention detects the connection and contact failure that the earth leakage breaker or the circuit breaker does not recognize in the low voltage indoor wiring system, and causes the alarm and the earth leakage breaker to shut off the corresponding line to protect the device and prevent the electric fire. The rectifier circuits D1 to D4 for reducing the pressure are condensed by the condenser C1, and the current flows through the filament-shaped bulb L, so that the current rapidly rises through the condenser when the impulse current is caused by connection or contact failure. By using the characteristic to convert the magnitude of the current to the brightness of the light bulb (L) and to generate the alarm sound (BZ) using the photo transistor (TR) and SCR (CR) or to connect the wiring circuit to the contact of the relay (RL) The present invention relates to an auxiliary device of a method of causing a short circuit to cause a ground fault circuit breaker to be blocked.

Description

Auxiliary apparatus for operating leak-breaker the bad contact of power line}

The present invention aims to protect the device by detecting the connection and contact failure of the wiring system, as well as the protection of the device, as well as the prevention of electric fires caused by overheating of the connection points and the elimination of contact surges.

In case of current leakage circuit breaker, circuit breaker, fuse, etc., the circuit breaker does not operate if the current over the standard flows for a long time or the current is interrupted. Therefore, it is very dangerous.

When the current flows in the state of poor contact of the connection point, due to the connection resistance, it is the main cause of the electric fire due to the deposition of the connection heat and the carbonization phenomenon of the insulation, especially in the case of capacitive load, the large current changes abruptly but is not continuous current. As a conventional circuit breaker can not be blocked.

These currents are a kind of surge current, which affects communication, home appliances, computers, measuring devices, etc., and is the main cause of burnout or malfunction.

Connection and contact failure can not be measured even during the safety check, it can be seen to be visually identified or disconnected.

Therefore, the present invention is designed to take advantage of the characteristic that the current rises rapidly in the capacitive load, there is a difficult problem of measuring the electric charge of the high-frequency impulse of contact failure In the present design using the filament-type bulb, the amount of spark pulses to the brightness of the bulb It is designed to simply recognize.

The present invention is a design devised in view of the above problems, and complements the existing blocking function by grafting with an alarm sound and an existing earth leakage breaker.

It identifies the connection and poor contact of the wiring circuit which is not recognized by the general earth leakage breaker or the circuit breaker, and fundamentally blocks the alarm sound or the power supply of the corresponding line to prevent the electric fire and protect the equipment using electricity.

Connect the power line (H, N) and ground (G) of the termination of the wiring circuit where the existing earth leakage breaker is installed or connect the ground (G) of the electric device to monitor the waveform of both ends of the power line. Type of bulbs in series and distinguished by the brightness of the bulbs. This is a method of grounding the power line through a resistor so that an alarm sound or an earth leakage breaker recognizes a short circuit.

1 is a basic circuit diagram for explaining the present invention

<Description of Major Codes in Drawings>

H, N: Power input terminal

G: ground terminal

S: Disconnection output switch during operation

C1: working power reducing capacitor

C2: operation power smoothing capacitor

D1 to D4: rectification diode

D5: Operating power constant voltage diode

L: Filament Bulb for Impulse Power Conversion

BZ: Alarm sound buzzer

TR: Phototransistor

CR: SCR for output

PL: Operation indicator

RL: Relay for ground output

TH1, TH2: PTC for grounding

P1, P2: relay contacts

The invention is described in detail according to the accompanying drawings.

1. H and N are power terminals and G is ground terminal.

2. C1 is an AC condenser that reduces the power supply voltage and the current controlled by the power frequency changes. Therefore, in the normal 60Hz alternating current, the current of the light bulb L does not turn on. ), Smoothing (C2), constant voltage (D5) is supplied to the impulse current (Surge) of abnormal contact failure, the light is increased by the current and the brightness is changed in proportion to the effective power of the pulse.

3. The light generated from the light bulb is received by the photo transistor TR, triggers the SCR CR, and drives the alarm sound BZ and the relay RL.

4. PL is an indicator lamp during operation. It is turned on in the normal operation without circuit breakdown, and is turned off in the event of alarm or shutdown operation or breakdown of the lamp due to SCR trigger.

5. When the relay RL operates, the ground current control resistors TH1 and TH2 allow the currents (50 to 100 mA) to flow through the power supplies H and N to the contacts P1 and P2. Turn the switch (S) off when the alarm is required.

6. Therefore, the sensitivity characteristic of the present invention is determined by the capacity of the capacitor, the size of the bulb, and the sensitivity of the light receiving circuit.

The present invention solves the problems caused by faults of existing earth leakage breakers, circuit breakers, and fuses that cannot be blocked by fuses, and is installed at the ends of wiring circuits to prevent electrical fires due to overheating of arcs and sparks. Of course, it is expected to be effective in the protection of electrical equipment by eliminating the cause of surge caused by poor contact.

Claims (2)

A method of connecting a condenser and a filament-type bulb in series between the lines (H, N) at the end of a wiring system to determine the connection and contact status based on the change in the brightness of the bulb. Auxiliary device which discriminates by the method of claim 1 and causes an earth leakage breaker to interrupt the wiring circuit when the leakage current flows when the connection or contact is poor.