KR100655229B1 - A real timer-type no-load protection circuit and self-diagnosis pilot lamp for magnetic-type ballastof high intensity discharge lamp - Google Patents

Abstract

The present invention provides a high-pressure discharge discharge lamp, the power supply for supplying power to turn on the discharge lamp; An igniter for generating high voltage pulses on the secondary windings by inducing counter electromotive force to the transformer by switching the thyristor when power is applied from the power supply unit; A self-diagnosis display unit which self-diagnoses the failure of the ballast and the discharge lamp and turns on / off the specific person visually to identify whether the ballast or the discharge lamp has failed; When the discharge lamp is in a no-load state, the power supply is cut off, but the power is supplied to the ballast for a predetermined shutdown delay time when the discharge lamp becomes a temperature capable of re-lighting, and the on / off is repeatedly performed without continuously operating the igniter even during the shutdown delay time. Real timer type no-load detection unit; And a power cut-off unit that cuts off the voltage supplied from the power supply unit in the no-load state according to the output signal of the real-time type no-load detection unit, and supplies a voltage in the non-loaded state. In case of no-load condition or igniter failure, the power is automatically cut off to secure safety and reduce power consumption. By using the self-diagnosis indicator, the trouble part is displayed and no unnecessary work is performed, thus reducing the installation cost. There is an emergency light to restore the lighting environment caused by the failure of the ballast and the discharge lamp.

Description

A real timer-type no-load protection circuit and self-diagnosis pilot lamp for magnetic-type ballastof high intensity discharge lamp}

1 is a block diagram showing a magnetic ballast for a high-pressure discharge lamp according to the present invention,

2 is an internal circuit diagram of a magnetic ballast for a high-pressure discharge lamp according to the present invention.

* Explanation of symbols for the main parts of the drawings

100: power supply unit 110: power detection display unit

200: igniter unit 210: self-diagnosis display unit

300: real-time type no-load detection unit 400: power cut off

410: power off display unit 500: discharge lamp

600: emergency light R1-R27: resistance

D1-D12: Diodes C1-C12: Condenser

ZD1 ~ ZD4: Zener Diode LED1 ~ LED3: Light Emitting Diode

SW1 ~ SW2: Relay switch Reset: Reset switch

T: transformer U1: integrated circuit

PC1-PC2: Photocouplers Q1-Q4: Thyristors

RL: relay F: fuse

v, v ': power

The present invention relates to a real-time type no-load protection circuit and a self-diagnosis indicator of a magnetic ballast for a high-pressure discharge lamp, and more particularly, to stably operate the discharge lamp through a plurality of light emitting diodes and stabilization circuits, Self-diagnosis circuit of discharge ballast for self-diagnosis and diagnosis of failure of ballast or discharge lamp, supplying power to ballast for predetermined shutdown delay time at no load, and do not operate igniter continuously during shutdown delay time. Magnetic ballasts for high-voltage discharge lamps that ensure safety and ballast life by repeating on / off without lighting, and in the event of a ballast failure, the self-diagnosis indicator lights up to enable visual identification and at the same time to turn on emergency lamps to restore the lighting environment. It is about.

In order to light a high-voltage discharge lamp commonly used for street light lighting or high ceiling lighting, a high initial starting voltage is supplied to the discharge lamp, that is, 2500 V to 3000 V for high-pressure sodium discharge lamps, 800 V to 2000 V for metal halide discharge lamps, and 3500 V to HQl discharge lamps. A high voltage pulse voltage of 4500V should be generated every 16.67ms (or 8.33ms), and after lighting, a ballast is needed to control the current.

If the installed streetlight fails, the exact location of the failure cannot be found, and there is a closure that replaces the entire ballast and discharge lamp of the expensive streetlight, requiring much manpower and effort to maintain the streetlight. In addition, uneconomical defects are appearing that require high maintenance costs.

In addition, when the output terminal of the high voltage discharge ballast is no-loaded or the discharge lamp is not lit while the power is on, the igniter of the high voltage discharge ballast will continue to operate and a high pulse voltage (1 KV or more) will be generated at the output of the ballast, resulting in electric shock. Due to the continuous operation of the igniter, the lifespan of the protection circuit and the winding of the ballast is shortened, and unnecessary power is consumed in the unlit state.

In addition, since it takes about 3 to 10 minutes for the discharge lamp to cool down after being turned off after turning on the discharge lamp, the power is cut off for about 20 minutes. However, the high igniter voltage is continuously output to the output stage for about 20 minutes to shut down the power.Therefore, there is a risk of electric shock due to high voltage. It may shorten the life of ballasts, such as the cause of ballast failure.

The present invention is to solve the problem of the magnetic ballast of the conventional high-pressure discharge lamp, the power supply to the ballast for a predetermined shutdown delay time in the case of no load state due to the disconnection of the discharge lamp, breakage of the discharge lamp, and the like. In order to ensure ballast life and safety by repeatedly turning on / off without continually operating the igniter, the self-diagnosis indicator lights up to enable visual identification of ballast failure and discharge lamps are off. It is an object of the present invention to provide a magnetic ballast for a high-pressure discharge lamp that lights an emergency light to restore the lighting environment in time.

Technical means of the present invention for achieving the above object is a high-voltage discharge lamp, the power supply unit for supplying power to turn on the high-pressure discharge lamp is composed of both ends (v, v ') of the power supply; A transformer (T) connected to the power supply terminal (v); a capacitor (C12) connected to the tap potential of the transformer; a thyristor (Q3) having an anode terminal connected to the other side of the capacitor; and a gate terminal of the thyristor and an output terminal of the transformer. It is composed of Zener diode (ZD4), resistors (R22, R23), diode (D10) connected to the igniter that generates high voltage pulse in the secondary winding by inducing counter electromotive force to transformer by switching operation of thyristor when power is applied from the power supply part. ; It consists of tertiary winding T3 wound around the coil of transformer and resistor R27, light emitting diode LED3 and diode D12 connected to the output terminal of tertiary winding. A self-diagnosis display unit for diagnosing a failure of a ballast and a discharge lamp so as to be visually identified by a specific person; Integrated circuit (U1) performing a timer function; and thyristor (Q2) connected to the pin 7 and the anode terminal of the integrated circuit; and diode (D7) connected to the cathode terminal of the thyristors; and zener diode (ZD2) connected to the gate terminal of the thyristor And a photocoupler (PC2) connected to pin 9 of the integrated circuit; and a resistor (R18) connected to the anode end of the photocoupler; and between a voltage control pin (pins 3 and 11) of the integrated circuit and an input terminal of the transformer (T). It consists of diode (D8), resistor (R17), zener diode (ZD3), and capacitor (C11) connected to it, and cuts off the power supply when the discharge lamp is in a no-load state, but a predetermined cutoff delay that causes the discharge lamp to become a temperature capable of re-lighting. A real timer type no-load detection unit which supplies power to the ballast for a time and repeats on / off without continuously operating the igniter even during a predetermined shutdown delay time; And a photocoupler PC1 to which the output signal of the no-load detection unit is transmitted, but in an electrically insulated state; and a thyristor Q1 through which the output signal of the photocoupler is transmitted through the gate end; and an anode end of the thyristor Q1. Relay (RL) connected to the relay; and relay switches (SW1, SW2) connected to both ends of the relay, in the case of the no-load state according to the output signal of the real-time type no-load detection unit cuts off the voltage supplied from the power supply and the no-load state If not, it is composed of a power cut-off unit for supplying a voltage.

According to the present invention, in case of no-load condition or igniter failure due to disconnection of discharge lamp, breakage of discharge lamp, etc., the power is automatically cut off to secure safety and reduce power consumption. The installation cost can be reduced because unnecessary work can be done, and when overcurrent is applied to the circuit through the fuse connected to the power supply, it can be cut off automatically to escape the danger of fire. You can restore the environment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a magnetic ballast for a high-pressure discharge lamp according to the present invention, the power supply unit 100, the power detection display unit 110, the igniter unit 200, the self-diagnosis display unit 210, real timer type no-load detection Part 300, the power cut-off unit 400, the power cut-off display unit 410, the discharge lamp 500 and the emergency light 600, Figure 2 is an internal circuit diagram of the magnetic ballast for high-pressure discharge lamp, Figure 2 With reference to each component in detail as follows.

The power supply unit 100 is composed of both ends of the power supply (v, v ') to supply power to the entire circuit for lighting the discharge lamp, but by the power detection display unit 110 composed of a light emitting diode (LED1) and a resistor (R1). When the power is normally supplied, the light emitting diode LED1 is turned on, and when the power is not supplied, the light emitting diode LED1 is turned off to visually identify whether the power is supplied, and a fuse F is further provided to block the overcurrent. When an overcurrent is applied, the fuse F is turned off to block the overcurrent flowing in the circuit.

The igniter unit 200 includes a transformer T connected to the power supply terminal v of the power supply unit 100 and a thyristor connected to the capacitor C12 connected to the tap potential of the transformer and an anode terminal connected to the other side of the capacitor C12. Zener diode (ZD4), resistors (R22, R23), diode (D10) connected between (Q3) and the gate terminal of thyristor (Q3) and the output terminal of transformer (T) and diode (D9) connected between anode and cathode terminals of thyristor ), A resistor R19 connected between the anode end of the zener diode ZD4 and the gate end of the thyristor Q3, and the resistor R20 connected between the anode end of the zener diode ZD4 and the cathode end of the thyristor Q3. It consists of a resistor (R21) connected between the cathode end of the ZD4 and the cathode end of the thyristor (Q3), when the power is supplied from the power supply unit 100 by the switching operation of the thyristor (Q3) and the primary winding (T1) and the capacitor ( By resonance of C12) The counter electromotive force in the transformer (T) is a transformer is an organic high-voltage pulse is generated in the secondary winding (T2).

The self-diagnosis display unit 210 includes a resistor (R27), a light emitting diode (LED3), and a diode (D12) connected to the output ends of the tertiary winding T3 and the tertiary winding T3 wound with predetermined turns on both ends of the transformer T. ), Self-diagnosis of failures of ballasts and discharge lamps, so that specific persons can visually identify the failures of ballasts and discharge lamps.

That is, when the discharge lamp is turned on and the light emitting diode (LED3) is turned off, the ballast is normal. When both the discharge lamp and the light emitting diode are turned off, the igniter of the ballast is defective. At this time, the transformer T is defective, and when the discharge lamp is turned off and the light emitting diode LED3 is turned on, the discharge lamp is defective.

The real timer no-load detection unit 300 includes an integrated circuit U1 (eg, LM556) that performs a timer function, a thyristor Q2 connected to pin 7 of the integrated circuit and an anode terminal, and a cathode of the thyristor Q2. A diode (D7) connected to the stage; and a zener diode (ZD2) connected to the gate terminal of the thyristor (Q2); and a photocoupler (PC2) connected to pin 9 of the integrated circuit; and a resistor (R18) connected to the anode terminal of the photocoupler (PC2). And a diode D8, a resistor R17, a zener diode ZD3, a capacitor C11, and a thyristor connected between the voltage control pins (pins 3 and 11) of the integrated circuit and an input terminal of the transformer T. A resistor R13 connected between the gate terminal of the Q2) and the zener diode ZD2; and a resistor R14 connected between the anode terminal of the zener diode ZD2 and the cathode terminal of the thyristor Q2; and the cathode of the zener diode ZD2. A capacitor C9 connected between the stage and the cathode of the thyristor Q2; and the integrated circuit It is connected to pin 11 of voltage control pin of furnace (U1), condenser (C8), capacitor (C7) connected to pin 3 of voltage control pin, resistor (R12) connected to pin 1 of discharge pin, pin 13 of discharge pin A resistor R15 connected to the resistor R15; A resistor R16 and a capacitor C9 connected to the power supply terminal v; A resistor (R10), a variable resistor (R11), a capacitor (C6) connected to the input power supply (pin 14) of the integrated circuit U1, and a resistor connected between pin 14 of the integrated circuit and the anode terminal of the photocoupler PC1. (R9), the power supply is cut off when the discharge lamp is in a no-load state, but the power is supplied to the ballast for a predetermined shutdown delay time for which the heated discharge lamp is cooled to a temperature capable of re-lighting, but the predetermined shutdown that the power is supplied The delay time is continuously changed according to the cooling rate of the discharge lamp according to the external environment, and the on / off is repeated without continuously operating the igniter even in the blocking delay time.

The power cut-off unit 400 includes a photocoupler PC1 to which the output signal of the no-load detection unit is transmitted but is electrically insulated; and a thyristor Q1 to which the output signal of the photocoupler is transmitted through the gate terminal; Relay (RL) connected to the anode end of Q1); and relay switches (SW1, SW2) connected to both ends of the relay; and a circuit protection capacitor (C2) for absorbing back EMF by on / off of the relay; and the relay (RL) A diode D4 connected between the anode end of the thyristor Q1; and a diode D1 connected between the power supply end v and the cathode end of the thyristor Q1; and the gate end of the thyristor Q1 and the diode D1. Capacitor (C1) connected between the anode end of the; and diode (D2) connected between the anode end and the power supply (v) of the thyristor (Q1); and the resistor (R3) connected to the emitter end of the photocoupler; and the resistor (R3) Cathode end of thyristor (Q1) and the other side A resistor (R4, R5, R6) and a diode (D5) connected between the capacitor (C3) connected to the cathode terminal of the thyristor (Q1) and the b 'contact of the relay switch (SW2), and the real-time type no-load detection unit. In the no-load state according to the output signal, the power supplied from the power supply unit 100 is cut off, and in the non-load state, the power is supplied.

The power cut-off display unit 410 may include a reset switch connected between a relay RL and a power terminal v 'and an emergency light connected between a contact c' of the relay switch SW1 and a contact c 'of the relay switch SW2. And a light emitting diode (LED2), a resistor (R2), and a diode (D3) connected between the contact a of the relay switch SW1 and the contact c 'of the switch SW2, and the discharge lamp is in a no-load state. In this case, when the photocoupler PC1 is operated, the thyristor Q1 is turned on and current flows in the relay so that the two relay switches SW1 and SW2 move to the c contact and the c 'contact to turn on the light emitting diode LED2 and the emergency light 600. Lights up.

The discharge lamp 500 is turned on by the high voltage pulse generated from the igniter when power is supplied from the power supply unit 100 to the igniter.

Emergency light 600 is automatically turned on to restore the lighting environment in the event of a ballast or discharge lamp failure. In this case, the emergency light uses an incandescent lamp or a halogen lamp.

FIG. 2 is an internal circuit diagram of a magnetic ballast for a high-pressure discharge lamp, and the operation configuration of FIG. 2 will be described in detail with reference to FIG. 1.

When power is supplied, power is passed through the relay switch SW1 through the fuse F and power is supplied to the discharge lamp 500 through the transformer T. In addition, when power is normally supplied, the light emitting diode LED1 is turned on by a current flowing through the light emitting diode LED1 through the resistor R1. If over current flows, the fuse F is turned off to cut off the over current supplied to the circuit. When power is applied to both ends of the discharge lamp, a voltage is applied to the resistor R21 through the resistor R22, the diode D10, and the resistor R22, and this voltage becomes equal to or higher than the breakdown voltage of the zener diode ZD4. Since the conduction is turned on, the thyristor Q3 is turned on. At this time, the resonance of the primary winding T1 and the capacitor C12 causes the transformer T to be a single winding transformer to supply high voltage pulses to both ends of the discharge lamp to light the discharge lamp.

After the discharge lamp is turned on, both ends of the discharge lamp have a lower discharge lamp voltage than before, and the voltage applied to the resistor R21 is lowered so that the zener diode ZD4 is not conducted and the thyristor Q3 is turned off to stop the igniter. .

When the ballast output stage is unloaded after the power is supplied, the voltage applied to the resistor R26 through the resistor R24, diode D11, and resistor R25 of the transformer output stage becomes greater than the breakdown voltage of the zener diode ZD2. When the thyristor Q2 is turned on, ground is formed in the timer U1 together with the diode D7.

When the ground is formed in the timer integrated circuit U1, the rectifier is rectified by the diode D8 and the power source voltage is made of the resistor R17, the zener diode ZD3, and the capacitor C11, and the power supply voltage is the timer integrated circuit U1. When input to, output voltage becomes high at pin 9 and pin 5 of output pins, and the voltage and output voltage are the same potential, so no current flows to photocoupler PC1, PC2, so thyristors Q1 and Q4 are not turned on. The thyristor Q3 is turned on to operate the igniter, and after a certain time, when the output voltage of pin 9 of the timer becomes low, the voltage flows to the photocoupler PC2 through the resistor R18, and the diode D6, the resistor. The voltage applied to the resistor R8 through the R7 flows through the gate terminal of the thyristor Q4 to turn on the thyristor Q4 so that the voltage applied to the resistor R21 becomes less than the breakdown voltage of the zener diode ZD4, thereby causing the thyristor ( Turn off Q3) and stop the igniter Will be added.

If the voltage of pin 9, the output pin of the timer integrated circuit, becomes high after a certain time after stopping the igniter, the thyristor Q4 is turned off and the thyristor Q3 is turned on again. To operate. The on / off operation of the thyristor Q4 is performed by the pin 9 output being high and the capacitor C9 is charged during the time that the capacitor C9 is charged through the resistor R16 connected to the input power supply of the timer integrated circuit U1. When the discharged voltage is discharged through the resistor (R15) connected to pin 13, which is the discharge pin, the output of pin 9 goes low and operates repeatedly until the circuit is completely disconnected.

That is, by using the real-time no-load detection unit, power is supplied to the ballast for a predetermined cutoff delay time at no load, and the on / off is repeated without continuously operating the igniter at the cutoff delay time.

The circuit is completely disconnected by pin 5, which is the output pin, while the capacitor C6 is charged through the resistor R10 and the variable resistor R11 connected to the input power supply of the integrated circuit U1 and charged to the capacitor C6. When the photocoupler PC1 does not operate and the voltage charged in the capacitor C6 is discharged through the resistor R12 connected to the pin 1, which is the discharge pin, the pin 5 becomes low and the integrated circuit U1 Power supply voltage flows through the photocoupler PC1 through the resistor R9 to turn on the thyristor Q1 to operate the relay RL.

In addition, the igniter voltage generated at both ends of the ballast output generates a high pressure pulse, and the generated high pressure pulse flows through the tertiary winding T3 to generate a slight voltage at both ends of the tertiary winding. The generated voltage turns on the light emitting diode LED3 through the variable resistor R11, the light emitting diode LED3, and the diode D12.

That is, if a slight voltage is generated at both ends of the tertiary winding T3 when the igniter of the ballast operates normally by winding a predetermined number of turns at both ends of the tertiary winding, the generated voltage turns on the light emitting diode LED3. When the igniter is defective, the voltage across the tertiary winding is almost 0V when the igniter is bad, and the light emitting diode (LED3) is turned off (the ballast is bad) .When the transformer is short, the igniter voltage generated by the turns ratio of the transformer is bad. This decreases, so that the light emitting diode LED3 is turned off, semi-finished, or flashes (bad ballast).

The photocoupler PC1 operates at no load, the gate current flows through the thyristor Q1, the thyristor Q1 is turned on, and the input power is operated through the reset switch Reset so that the relay RL is operated. ) Is moved from b, b 'contact to c, c' contact, the current flowing to the ballast is cut off and the input power is consumed by the relay RL, and at the c contact of the relay switch SW2, Through the resistor R2, current flows to the contact c of the relay switch SW1 to turn on the light emitting diode LED2, and current flows to the contact c 'of the relay switch SW2 to light the emergency light.

In addition, the reset switch (Reset), after pressing the reset in the power-off state at no load, when the circuit of the ballast is converted to the normal mode, it determines the point of failure of the light emitting diode (LED3) of the self-diagnosis display part to determine which part is broken. Can be. Also, after replacing the discharge lamp and pressing the reset switch, it is easy to check and light because the ballast returns to the normal mode.

In addition, the variable resistor (R11) shortens the inspection time by reducing the interruption time during the entire inspection of the product, the voltage applied to the resistor (R4) through the diode (D5), resistors (R6, R5) is a capacitor (C3) The charged and charged voltage is supplied to the photocoupler PC1, the diodes D1, D2, D3, and D4 protect the thyristor Q1, and the capacitor C2 absorbs back EMF by the on / off of the relay coil. To protect the circuit, and a capacitor (C1), a diode (D9) and a zener diode (ZD1) were added for stable operation of the circuit, and a switch (SW2) for interrupting the other line of the power supply terminal to the power supply side. In addition, the relay RL is interlocked with the switch SW1.

In addition, by connecting the power factor improving capacitor (C4) at both ends of the power supply and connecting the capacitor when the supply voltage is lower than the set value and disconnecting it when the value is higher than the set value, the high power factor flowing through the circuit is improved. The device can be made as effective as possible, and a small current can be sent to the same load on the power supply side, so that the voltage drop is reduced and the use effect of the power equipment is increased.

The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the following claims.

As described in detail above, when the discharge lamp is not lit or no-load state, if the igniter voltage is continuously output, it is shorted to the luminaire and the risk of electric shock is high. However, the present invention has a built-in real-time type no-load detection circuit, after power off at no load. In addition, by ensuring safety even in the standby time, the life of the igniter switching element can be extended and the life of the protection circuit element due to high voltage can be extended, and the breakdown of the ballast due to the continuous application of high voltage to the ballast winding can be prevented. Can be extended.

In case of no-load condition or igniter failure due to disconnection of discharge lamp or damage of discharge lamp, power is automatically cut off to secure safety and reduce power consumption. The installation cost can be reduced, and when overvoltage current is applied to the circuit through the fuse connected to the power supply, it can be cut off automatically to escape the danger of fire. Can be recovered.

In addition, it is equipped with a reset switch and when the power is turned off at no load, when the circuit of the ballast is converted to the normal mode, the light emitting diode (LED3) of the self-diagnosis display part is judged to determine whether any part is broken. It is easy to check and light because the ballast returns to the normal mode when the reset switch is pressed.

Claims (5)

In the high pressure discharge discharge lamp, A power supply unit configured to supply both ends of the power supply (v, v ') and supply power to turn on the high-voltage discharge lamp; A transformer (T) connected to the power supply terminal (v); and a capacitor (C12) connected to a tap (Tap) potential of the transformer; and a thyristor (Q3) having an anode terminal connected to the other side of the capacitor; and a gate terminal of the thyristor and an output terminal of the transformer It consists of Zener diode (ZD4), resistors (R22, R23), diode (D10) connected between, when the power is applied from the power supply unit, the thyristor switching operation to induce the back electromotive force of the transformer to generate a high voltage pulse to the secondary winding Generated igniter; It consists of a tertiary winding (T3) wound around the coil of the transformer and a resistor (R27), a light emitting diode (LED3), a diode (D12) connected to the output terminal of the tertiary winding, to prevent failure of the ballast and the discharge. A self-diagnosis display unit which is self-diagnosed so that a specific person visually identifies whether a ballast or a discharge is broken; Dual timer integrated circuit (U1) that performs the timer function; and thyristor (Q2) is connected to the ground pin and the anode terminal of the integrated circuit; and diode (D7) connected to the cathode terminal of the thyristors; and Zener diode connected to the gate terminal of the thyristor ( ZD2); and photocoupler PC2 connected to the output pin of the integrated circuit; and a resistor R18 connected to the anode end of the photocoupler; and a diode D8 connected between the voltage control pin of the integrated circuit and the input terminal of the transformer T. , Resistor R17, zener diode (ZD3), and capacitor (C11), which shut off the power supply when the discharge lamp is in a no-load state, but supplies power to the ballast for a predetermined shutdown delay time such that the discharge lamp becomes a temperature capable of re-lighting. A real timer type no-load detection unit for supplying and repeating on / off without continuously operating the igniter even in a cutoff delay time; And A photocoupler PC1 through which the output signal of the no-load detector is transmitted; and a thyristor Q1 through which the output signal of the photocoupler is transmitted through a gate terminal; and a relay RL connected to the anode terminal of the thyristor Q1; It is composed of relay switches (SW1, SW2) connected to both ends, when the no-load state corresponding to the output signal of the real-time type no-load detection unit cuts off the voltage supplied from the power supply unit and supplies the voltage when the state is not Real-time type no-load protection circuit and the self-diagnosis indicator of the magnetic ballast for high-voltage discharge lamp, characterized in that it comprises a power interrupter. The method of claim 1, wherein the power supply unit A fuse F for blocking the overcurrent; Real-time type no-load protection circuit and magnetic of the magnetic ballast for high-voltage discharge lamp, characterized in that it further comprises; a power detection display unit consisting of a resistor (R1) and a light emitting diode (LED1) that is turned on / off so that the power supply is discernable Diagnostic lights. The method of claim 1, wherein the power cut off portion The reset connected between the relay and the power supply (v ') and the emergency light connected between the contacts c and c' of the two switches SW1 and SW2 and the contact a 'of the relay switch SW1 and the c' contact of the relay switch SW2. Also provided with a light emitting diode (LED2) connected between, when the photocoupler (PC1) is operated when the discharge lamp is in a no-load state, the thyristor (Q1) is turned on to flow the current through the relay relay switch (SW1) is moved to the c contact And at the same time, the relay switch (SW2) is a real-time type no-load protection circuit of the magnetic ballast for high-voltage discharge lamp, characterized in that it further comprises a power cut-off display for moving the light emitting diode (LED2) and the emergency light to the c 'contact point; Self-diagnosis indicator. 4. The emergency light of claim 3 wherein the emergency light Real-time type no-load protection circuit and self-diagnosis indicator of magnetic ballast for high voltage discharge lamp, characterized by incandescent lamp or halogen lamp. The method of claim 1, wherein the power cut off portion A real-time type no-load protection circuit and a self-diagnosis indicator of a magnetic ballast for a high voltage discharge lamp, further comprising a circuit protection capacitor (C2) for absorbing back electromotive force due to the on / off of the relay (RL).

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