| 摘要 |
A multiple ballast of a high efficiency for an industry is provided to improve safety and exchange a device by performing self-diagnosis and reading delay time and state. A power unit(10) rectifies and provides AC power to a relay, and drops the AC power. A short circuit detection unit(20) detects leakage current generated in an image transformer. An auxiliary lighting unit(30) blocks a high voltage by inducing the high voltage to a secondary terminal of a winding type transformer of a ballast according to a phase of an AC wave through control of a microcomputer(60). A ballast(40) has the winding type transformer which connects AC power output to a lamp in series. A lamp lighting state detection unit(50) is connected to one side of the ballast and detects a voltage state of the lamp. The lamp lighting state detection unit(50) detects a high voltage and a short circuit of the ballast, and a normal state of the lamp. If a lamp error is detected through the lamp lighting state detection unit(50), the microcomputer(60) controls an operation state of the lamp by blocking a high voltage after the lamp tries to turn on for twenty minutes. A display lamp unit(70) is connected to one side of the microcomputer(60), and displays a power input state, a high voltage operation state, a safety interruption, a short circuit state, and a lamp error. |
