| 摘要 |
PURPOSE:To prevent a battery from being consumed, by stopping inverter feed when the output current on a no-break power unit or an inverter section comes to a specified value or less. CONSTITUTION:At the time of commercial feed, commercial power is fed to a load (2) through an AC switch (3), and a battery section (5) is changed. When service interruption is generated, then from a service interruption detecting circuit section (6), the output of service interruption signal is generated, and an inverter feed state is set. When output current detected by a current transformer (9) is less than an initial value, then from a current detecting circuit section (7), via a control section (8), signal for stopping the inverter feed of a no-break power unit is transmitted to an inverter section (4). |
