Protection circuit for stabilizer for discharge apparatus

A protection circuit compatible with an electronic stabilizer for a charge apparatus, wherein an anode of a diode is coupled to an output of a voltage detecting device in a lighting circuit connected to an HID lamp and a first capacitor and a gate of a thyristor are coupled in parallel from a cathode of said diode, an anode of said thyristor being connected to a power source, said thyristor having a cathode;

• said protection circuit comprising:
• a relay switch having three contact points, a first contact point of said relay switch being coupled to said thyristor cathode;
• a second capacitor and a gate of a first transistor connected in parallel to a second contact point of said relay switch;
• a relay coil connected in series with electrodes of said first transistor and said power source;
• a second transistor coupled to a third contact point of said relay switch and controlling operation of a third transistor connected in said lighting circuit to control said HID lamp.

A protection circuit, compatible with an electronic stabilizer for a discharge apparatus, wherein an anode of a diode is coupled to an output of a voltage detecting device in a lighting circuit connected to an HID lamp and a first capacitor and a gate of a thyristor are coupled in parallel from a cathode of said diode, an anode of said thyristor being connected to a power source, said thyristor having a cathode;

• said protection circuit comprising:
• a first transistor having a base and having a collector coupled to said thyristor anode;
• a diac coupled to said base of said first transistor;
• a resistor connected between said diac and said power source;
• and
• a second capacitor coupled to a node between said diac and resistor.