| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent an uninterruptible power supply from being caused to malfunction by the input of the abnormal wave form of haired pulses from a commercial power supply into the ferro-fesonance power supply part of the uninterruptible power supply, when the uninterruptible power supply comprising the ferro-resonance power supply part that adjusts a voltage works as a power supply for a plurality of relay amplifiers installed in CATV transmission lines. SOLUTION: An uninterruptible power supply 6 comprises a ferro-resonance power supply part (a ferro-resonance transformer T1) that outputs the electric power whose voltage is adjusted and an inverter that feeds the power supply part from a battery if a failure of a commercial power supply is detected. In this device, a power source wave-form shaping device 7 that absorbs abnormal wave forms that come into the input terminals of the commercial power side of the ferro-resonance power supply part is inserted in the input terminal of the commercial power side.</p> |
